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authorMatthew Pickering <matthewtpickering@gmail.com>2021-07-15 17:16:49 +0100
committerMarge Bot <ben+marge-bot@smart-cactus.org>2021-08-18 17:57:42 -0400
commit5f0d2dab9be5b0f89d61e9957bb728538b162230 (patch)
tree46a725692e2cea227160a61266063cc4a5c2444a /testsuite
parent0ba21dbe28882d506c3536c40224ebff337a9f49 (diff)
downloadhaskell-5f0d2dab9be5b0f89d61e9957bb728538b162230.tar.gz
Driver rework pt3: the upsweep
This patch specifies and simplifies the module cycle compilation in upsweep. How things work are described in the Note [Upsweep] Note [Upsweep] ~~~~~~~~~~~~~~ Upsweep takes a 'ModuleGraph' as input, computes a build plan and then executes the plan in order to compile the project. The first step is computing the build plan from a 'ModuleGraph'. The output of this step is a `[BuildPlan]`, which is a topologically sorted plan for how to build all the modules. ``` data BuildPlan = SingleModule ModuleGraphNode -- A simple, single module all alone but *might* have an hs-boot file which isn't part of a cycle | ResolvedCycle [ModuleGraphNode] -- A resolved cycle, linearised by hs-boot files | UnresolvedCycle [ModuleGraphNode] -- An actual cycle, which wasn't resolved by hs-boot files ``` The plan is computed in two steps: Step 1: Topologically sort the module graph without hs-boot files. This returns a [SCC ModuleGraphNode] which contains cycles. Step 2: For each cycle, topologically sort the modules in the cycle *with* the relevant hs-boot files. This should result in an acyclic build plan if the hs-boot files are sufficient to resolve the cycle. The `[BuildPlan]` is then interpreted by the `interpretBuildPlan` function. * `SingleModule nodes` are compiled normally by either the upsweep_inst or upsweep_mod functions. * `ResolvedCycles` need to compiled "together" so that the information which ends up in the interface files at the end is accurate (and doesn't contain temporary information from the hs-boot files.) - During the initial compilation, a `KnotVars` is created which stores an IORef TypeEnv for each module of the loop. These IORefs are gradually updated as the loop completes and provide the required laziness to typecheck the module loop. - At the end of typechecking, all the interface files are typechecked again in the retypecheck loop. This time, the knot-tying is done by the normal laziness based tying, so the environment is run without the KnotVars. * UnresolvedCycles are indicative of a proper cycle, unresolved by hs-boot files and are reported as an error to the user. The main trickiness of `interpretBuildPlan` is deciding which version of a dependency is visible from each module. For modules which are not in a cycle, there is just one version of a module, so that is always used. For modules in a cycle, there are two versions of 'HomeModInfo'. 1. Internal to loop: The version created whilst compiling the loop by upsweep_mod. 2. External to loop: The knot-tied version created by typecheckLoop. Whilst compiling a module inside the loop, we need to use the (1). For a module which is outside of the loop which depends on something from in the loop, the (2) version is used. As the plan is interpreted, which version of a HomeModInfo is visible is updated by updating a map held in a state monad. So after a loop has finished being compiled, the visible module is the one created by typecheckLoop and the internal version is not used again. This plan also ensures the most important invariant to do with module loops: > If you depend on anything within a module loop, before you can use the dependency, the whole loop has to finish compiling. The end result of `interpretBuildPlan` is a `[MakeAction]`, which are pairs of `IO a` actions and a `MVar (Maybe a)`, somewhere to put the result of running the action. This list is topologically sorted, so can be run in order to compute the whole graph. As well as this `interpretBuildPlan` also outputs an `IO [Maybe (Maybe HomeModInfo)]` which can be queried at the end to get the result of all modules at the end, with their proper visibility. For example, if any module in a loop fails then all modules in that loop will report as failed because the visible node at the end will be the result of retypechecking those modules together. Along the way we also fix a number of other bugs in the driver: * Unify upsweep and parUpsweep. * Fix #19937 (static points, ghci and -j) * Adds lots of module loop tests due to Divam. Also related to #20030 Co-authored-by: Divam Narula <dfordivam@gmail.com> ------------------------- Metric Decrease: T10370 -------------------------
Diffstat (limited to 'testsuite')
-rw-r--r--testsuite/tests/backpack/reexport/Makefile11
-rw-r--r--testsuite/tests/backpack/reexport/all.T4
-rw-r--r--testsuite/tests/backpack/reexport/bkpreex03.bkp2
-rw-r--r--testsuite/tests/backpack/reexport/bkpreex03.stderr5
-rw-r--r--testsuite/tests/backpack/reexport/bkpreex03.stdout6
-rw-r--r--testsuite/tests/backpack/reexport/bkpreex04.bkp2
-rw-r--r--testsuite/tests/backpack/reexport/bkpreex04.stderr4
-rw-r--r--testsuite/tests/backpack/reexport/bkpreex04.stdout5
-rw-r--r--testsuite/tests/backpack/reexport/bkpreex04a.bkp6
-rw-r--r--testsuite/tests/backpack/should_compile/bkp58.stderr10
-rw-r--r--testsuite/tests/backpack/should_compile/bkp60.stderr10
-rw-r--r--testsuite/tests/backpack/should_fail/bkpfail28.stderr10
-rw-r--r--testsuite/tests/backpack/should_fail/bkpfail49.stderr7
-rw-r--r--testsuite/tests/count-deps/CountDepsAst.stdout3
-rw-r--r--testsuite/tests/count-deps/CountDepsParser.stdout3
-rw-r--r--testsuite/tests/driver/T14075/T14075.stdout3
-rw-r--r--testsuite/tests/driver/T20030/test1/A.hs3
-rw-r--r--testsuite/tests/driver/T20030/test1/A.hs-boot2
-rw-r--r--testsuite/tests/driver/T20030/test1/B.hs2
-rw-r--r--testsuite/tests/driver/T20030/test1/C.hs2
-rw-r--r--testsuite/tests/driver/T20030/test1/C.hs-boot1
-rw-r--r--testsuite/tests/driver/T20030/test1/D.hs2
-rw-r--r--testsuite/tests/driver/T20030/test1/E.hs2
-rw-r--r--testsuite/tests/driver/T20030/test1/E.hs-boot2
-rw-r--r--testsuite/tests/driver/T20030/test1/F.hs2
-rw-r--r--testsuite/tests/driver/T20030/test1/G.hs2
-rw-r--r--testsuite/tests/driver/T20030/test1/H.hs2
-rw-r--r--testsuite/tests/driver/T20030/test1/I.hs2
-rw-r--r--testsuite/tests/driver/T20030/test1/J.hs1
-rw-r--r--testsuite/tests/driver/T20030/test1/J.hs-boot1
-rw-r--r--testsuite/tests/driver/T20030/test1/K.hs2
-rw-r--r--testsuite/tests/driver/T20030/test1/T20030_test1.stderr13
-rw-r--r--testsuite/tests/driver/T20030/test1/all.T6
-rw-r--r--testsuite/tests/driver/T20030/test2/L.hs3
-rw-r--r--testsuite/tests/driver/T20030/test2/L.hs-boot1
-rw-r--r--testsuite/tests/driver/T20030/test2/M.hs2
-rw-r--r--testsuite/tests/driver/T20030/test2/M.hs-boot2
-rw-r--r--testsuite/tests/driver/T20030/test2/O.hs3
-rw-r--r--testsuite/tests/driver/T20030/test2/O.hs-boot1
-rw-r--r--testsuite/tests/driver/T20030/test2/T20030_test2.stderr6
-rw-r--r--testsuite/tests/driver/T20030/test2/all.T4
-rw-r--r--testsuite/tests/driver/T20030/test3/L.hs4
-rw-r--r--testsuite/tests/driver/T20030/test3/L.hs-boot1
-rw-r--r--testsuite/tests/driver/T20030/test3/M.hs2
-rw-r--r--testsuite/tests/driver/T20030/test3/M.hs-boot2
-rw-r--r--testsuite/tests/driver/T20030/test3/N.hs3
-rw-r--r--testsuite/tests/driver/T20030/test3/N.hs-boot1
-rw-r--r--testsuite/tests/driver/T20030/test3/O.hs3
-rw-r--r--testsuite/tests/driver/T20030/test3/O.hs-boot1
-rw-r--r--testsuite/tests/driver/T20030/test3/T20030_test3.stderr7
-rw-r--r--testsuite/tests/driver/T20030/test3/all.T4
-rw-r--r--testsuite/tests/driver/T20030/test4/L1.hs4
-rw-r--r--testsuite/tests/driver/T20030/test4/L1.hs-boot1
-rw-r--r--testsuite/tests/driver/T20030/test4/L1_1.hs2
-rw-r--r--testsuite/tests/driver/T20030/test4/L2.hs3
-rw-r--r--testsuite/tests/driver/T20030/test4/L2.hs-boot1
-rw-r--r--testsuite/tests/driver/T20030/test4/L2_1.hs2
-rw-r--r--testsuite/tests/driver/T20030/test4/M.hs3
-rw-r--r--testsuite/tests/driver/T20030/test4/T20030_test4.stderr10
-rw-r--r--testsuite/tests/driver/T20030/test4/UOL1.hs4
-rw-r--r--testsuite/tests/driver/T20030/test4/UOL1_2.hs4
-rw-r--r--testsuite/tests/driver/T20030/test4/UOL2.hs4
-rw-r--r--testsuite/tests/driver/T20030/test4/all.T6
-rw-r--r--testsuite/tests/driver/T20030/test5/L1.hs4
-rw-r--r--testsuite/tests/driver/T20030/test5/L1.hs-boot1
-rw-r--r--testsuite/tests/driver/T20030/test5/L1_1.hs2
-rw-r--r--testsuite/tests/driver/T20030/test5/L2.hs3
-rw-r--r--testsuite/tests/driver/T20030/test5/L2.hs-boot1
-rw-r--r--testsuite/tests/driver/T20030/test5/L2_1.hs2
-rw-r--r--testsuite/tests/driver/T20030/test5/T20030_test5.stderr9
-rw-r--r--testsuite/tests/driver/T20030/test5/UOL1.hs3
-rw-r--r--testsuite/tests/driver/T20030/test5/UOL1_2.hs4
-rw-r--r--testsuite/tests/driver/T20030/test5/UOL2.hs3
-rw-r--r--testsuite/tests/driver/T20030/test5/all.T6
-rw-r--r--testsuite/tests/driver/T20030/test6/L1.hs3
-rw-r--r--testsuite/tests/driver/T20030/test6/L1.hs-boot1
-rw-r--r--testsuite/tests/driver/T20030/test6/L1_1.hs2
-rw-r--r--testsuite/tests/driver/T20030/test6/L1_2.hs3
-rw-r--r--testsuite/tests/driver/T20030/test6/L2.hs2
-rw-r--r--testsuite/tests/driver/T20030/test6/L2.hs-boot1
-rw-r--r--testsuite/tests/driver/T20030/test6/L2_1.hs2
-rw-r--r--testsuite/tests/driver/T20030/test6/L2_2.hs3
-rw-r--r--testsuite/tests/driver/T20030/test6/T20030_test6.stderr12
-rw-r--r--testsuite/tests/driver/T20030/test6/UOL1.hs3
-rw-r--r--testsuite/tests/driver/T20030/test6/UOL1_1.hs3
-rw-r--r--testsuite/tests/driver/T20030/test6/UOL1_2.hs4
-rw-r--r--testsuite/tests/driver/T20030/test6/UOL2.hs3
-rw-r--r--testsuite/tests/driver/T20030/test6/all.T6
-rw-r--r--testsuite/tests/driver/recomp-boot/recomp-boot.stdout4
-rw-r--r--testsuite/tests/driver/recomp-boot2/recomp-boot2.stdout4
-rw-r--r--testsuite/tests/ghci/prog018/prog018.stdout4
-rw-r--r--testsuite/tests/plugins/T11244.stderr4
92 files changed, 292 insertions, 42 deletions
diff --git a/testsuite/tests/backpack/reexport/Makefile b/testsuite/tests/backpack/reexport/Makefile
index 9101fbd40a..eca0a161dd 100644
--- a/testsuite/tests/backpack/reexport/Makefile
+++ b/testsuite/tests/backpack/reexport/Makefile
@@ -1,3 +1,14 @@
TOP=../../..
include $(TOP)/mk/boilerplate.mk
include $(TOP)/mk/test.mk
+
+# Testing recompilation for backpack
+bkpreex03:
+ "$(TEST_HC)" $(TEST_HC_OPTS) -v1 --backpack bkpreex03.bkp -fhide-source-paths
+ sed -i 's/import M1/import M2/' bkpreex03.bkp
+ "$(TEST_HC)" $(TEST_HC_OPTS) -v1 --backpack bkpreex03.bkp -fhide-source-paths
+
+bkpreex04:
+ "$(TEST_HC)" $(TEST_HC_OPTS) -v1 --backpack bkpreex04.bkp -fhide-source-paths
+ cp bkpreex04a.bkp bkpreex04.bkp
+ "$(TEST_HC)" $(TEST_HC_OPTS) -v1 --backpack bkpreex04.bkp -fhide-source-paths
diff --git a/testsuite/tests/backpack/reexport/all.T b/testsuite/tests/backpack/reexport/all.T
index 5619707e5d..f677f01f2e 100644
--- a/testsuite/tests/backpack/reexport/all.T
+++ b/testsuite/tests/backpack/reexport/all.T
@@ -1,7 +1,7 @@
test('bkpreex01', normal, backpack_typecheck, [''])
test('bkpreex02', normal, backpack_typecheck, [''])
-test('bkpreex03', normal, backpack_typecheck, [''])
-test('bkpreex04', normal, backpack_typecheck, [''])
+test('bkpreex03', [copy_files], makefile_test, [])
+test('bkpreex04', [copy_files], makefile_test, [])
# These signatures are behaving badly and the renamer gets confused
test('bkpreex05', expect_broken(0), backpack_typecheck, [''])
test('bkpreex06', normal, backpack_typecheck, [''])
diff --git a/testsuite/tests/backpack/reexport/bkpreex03.bkp b/testsuite/tests/backpack/reexport/bkpreex03.bkp
index 69da4a4ddc..706047c243 100644
--- a/testsuite/tests/backpack/reexport/bkpreex03.bkp
+++ b/testsuite/tests/backpack/reexport/bkpreex03.bkp
@@ -5,5 +5,3 @@ unit p where
data M = M
signature A(module A, M) where
import M1
- signature A(module A, M) where
- import M2
diff --git a/testsuite/tests/backpack/reexport/bkpreex03.stderr b/testsuite/tests/backpack/reexport/bkpreex03.stderr
deleted file mode 100644
index 0fc295c018..0000000000
--- a/testsuite/tests/backpack/reexport/bkpreex03.stderr
+++ /dev/null
@@ -1,5 +0,0 @@
-[1 of 1] Processing p
- [1 of 4] Compiling M1 ( p/M1.hs, nothing )
- [2 of 4] Compiling M2 ( p/M2.hs, nothing )
- [3 of 4] Compiling A[sig] ( p/A.hsig, nothing )
- [4 of 4] Compiling A[sig] ( p/A.hsig, nothing ) [M2 added]
diff --git a/testsuite/tests/backpack/reexport/bkpreex03.stdout b/testsuite/tests/backpack/reexport/bkpreex03.stdout
new file mode 100644
index 0000000000..f35b52c198
--- /dev/null
+++ b/testsuite/tests/backpack/reexport/bkpreex03.stdout
@@ -0,0 +1,6 @@
+[1 of 1] Processing p
+[1 of 3] Compiling M1
+[2 of 3] Compiling M2
+[3 of 3] Compiling A[sig]
+[1 of 1] Processing p
+[3 of 3] Compiling A[sig] [M2 added]
diff --git a/testsuite/tests/backpack/reexport/bkpreex04.bkp b/testsuite/tests/backpack/reexport/bkpreex04.bkp
index 4788b4ab04..e504a7603e 100644
--- a/testsuite/tests/backpack/reexport/bkpreex04.bkp
+++ b/testsuite/tests/backpack/reexport/bkpreex04.bkp
@@ -3,5 +3,3 @@ unit p where
data T
signature B where
data T
- signature A(module A, T) where
- import B(T)
diff --git a/testsuite/tests/backpack/reexport/bkpreex04.stderr b/testsuite/tests/backpack/reexport/bkpreex04.stderr
deleted file mode 100644
index 83c42910d6..0000000000
--- a/testsuite/tests/backpack/reexport/bkpreex04.stderr
+++ /dev/null
@@ -1,4 +0,0 @@
-[1 of 1] Processing p
- [1 of 3] Compiling A[sig] ( p/A.hsig, nothing )
- [2 of 3] Compiling B[sig] ( p/B.hsig, nothing )
- [3 of 3] Compiling A[sig] ( p/A.hsig, nothing ) [B added]
diff --git a/testsuite/tests/backpack/reexport/bkpreex04.stdout b/testsuite/tests/backpack/reexport/bkpreex04.stdout
new file mode 100644
index 0000000000..376747c456
--- /dev/null
+++ b/testsuite/tests/backpack/reexport/bkpreex04.stdout
@@ -0,0 +1,5 @@
+[1 of 1] Processing p
+[1 of 2] Compiling A[sig]
+[2 of 2] Compiling B[sig]
+[1 of 1] Processing p
+[2 of 2] Compiling A[sig] [B added]
diff --git a/testsuite/tests/backpack/reexport/bkpreex04a.bkp b/testsuite/tests/backpack/reexport/bkpreex04a.bkp
new file mode 100644
index 0000000000..095e092a54
--- /dev/null
+++ b/testsuite/tests/backpack/reexport/bkpreex04a.bkp
@@ -0,0 +1,6 @@
+unit p where
+ signature B where
+ data T
+ signature A(module A, T) where
+ import B(T)
+
diff --git a/testsuite/tests/backpack/should_compile/bkp58.stderr b/testsuite/tests/backpack/should_compile/bkp58.stderr
index c5ce8bd55f..a33a9d66bc 100644
--- a/testsuite/tests/backpack/should_compile/bkp58.stderr
+++ b/testsuite/tests/backpack/should_compile/bkp58.stderr
@@ -1,13 +1,13 @@
[1 of 3] Processing common
Instantiating common
- [1 of 1] Compiling Class ( common/Class.hs, bkp58.out/common/Class.o )
+[1 of 1] Compiling Class ( common/Class.hs, bkp58.out/common/Class.o )
[2 of 3] Processing consumer-impl
Instantiating consumer-impl
[1 of 1] Including common
- [1 of 3] Compiling Impl[boot] ( consumer-impl/Impl.hs-boot, bkp58.out/consumer-impl/Impl.o-boot )
- [2 of 3] Compiling Downstream ( consumer-impl/Downstream.hs, bkp58.out/consumer-impl/Downstream.o )
- [3 of 3] Compiling Impl ( consumer-impl/Impl.hs, bkp58.out/consumer-impl/Impl.o )
+[1 of 3] Compiling Impl[boot] ( consumer-impl/Impl.hs-boot, bkp58.out/consumer-impl/Impl.o-boot )
+[2 of 3] Compiling Downstream ( consumer-impl/Downstream.hs, bkp58.out/consumer-impl/Downstream.o )
+[3 of 3] Compiling Impl ( consumer-impl/Impl.hs, bkp58.out/consumer-impl/Impl.o )
[3 of 3] Processing tie
Instantiating tie
[1 of 1] Including consumer-impl
- [1 of 1] Compiling Tie ( tie/Tie.hs, bkp58.out/tie/Tie.o )
+[1 of 1] Compiling Tie ( tie/Tie.hs, bkp58.out/tie/Tie.o )
diff --git a/testsuite/tests/backpack/should_compile/bkp60.stderr b/testsuite/tests/backpack/should_compile/bkp60.stderr
index 070a908b17..8e22b1058e 100644
--- a/testsuite/tests/backpack/should_compile/bkp60.stderr
+++ b/testsuite/tests/backpack/should_compile/bkp60.stderr
@@ -1,13 +1,13 @@
[1 of 3] Processing common
Instantiating common
- [1 of 1] Compiling Class ( common/Class.hs, bkp60.out/common/Class.o )
+[1 of 1] Compiling Class ( common/Class.hs, bkp60.out/common/Class.o )
[2 of 3] Processing consumer-impl
Instantiating consumer-impl
[1 of 1] Including common
- [1 of 3] Compiling Impl[boot] ( consumer-impl/Impl.hs-boot, bkp60.out/consumer-impl/Impl.o-boot )
- [2 of 3] Compiling Downstream ( consumer-impl/Downstream.hs, bkp60.out/consumer-impl/Downstream.o )
- [3 of 3] Compiling Impl ( consumer-impl/Impl.hs, bkp60.out/consumer-impl/Impl.o )
+[1 of 3] Compiling Impl[boot] ( consumer-impl/Impl.hs-boot, bkp60.out/consumer-impl/Impl.o-boot )
+[2 of 3] Compiling Downstream ( consumer-impl/Downstream.hs, bkp60.out/consumer-impl/Downstream.o )
+[3 of 3] Compiling Impl ( consumer-impl/Impl.hs, bkp60.out/consumer-impl/Impl.o )
[3 of 3] Processing tie
Instantiating tie
[1 of 1] Including consumer-impl
- [1 of 1] Compiling Tie ( tie/Tie.hs, bkp60.out/tie/Tie.o )
+[1 of 1] Compiling Tie ( tie/Tie.hs, bkp60.out/tie/Tie.o )
diff --git a/testsuite/tests/backpack/should_fail/bkpfail28.stderr b/testsuite/tests/backpack/should_fail/bkpfail28.stderr
index ef8d72cfe3..d6f267648c 100644
--- a/testsuite/tests/backpack/should_fail/bkpfail28.stderr
+++ b/testsuite/tests/backpack/should_fail/bkpfail28.stderr
@@ -1,10 +1,10 @@
[1 of 3] Processing p
- [1 of 1] Compiling A[sig] ( p/A.hsig, nothing )
+[1 of 1] Compiling A[sig] ( p/A.hsig, nothing )
[2 of 3] Processing q
- [1 of 1] Compiling A[sig] ( q/A.hsig, nothing )
+[1 of 1] Compiling A[sig] ( q/A.hsig, nothing )
[3 of 3] Processing r
- [1 of 4] Compiling A[sig] ( r/A.hsig, nothing )
- [2 of 4] Compiling R ( r/R.hs, nothing )
+[1 of 4] Compiling A[sig] ( r/A.hsig, nothing )
+[2 of 4] Compiling R ( r/R.hs, nothing )
bkpfail28.bkp:19:13: error:
• Overlapping instances for Show (K a) arising from a use of ‘show’
@@ -25,3 +25,5 @@ bkpfail28.bkp:21:13: error:
-- Defined at bkpfail28.bkp:12:18
• In the expression: show
In an equation for ‘g’: g = show
+[3 of 4] Instantiating p
+[4 of 4] Instantiating q
diff --git a/testsuite/tests/backpack/should_fail/bkpfail49.stderr b/testsuite/tests/backpack/should_fail/bkpfail49.stderr
index 27892ec8cf..a140bbfade 100644
--- a/testsuite/tests/backpack/should_fail/bkpfail49.stderr
+++ b/testsuite/tests/backpack/should_fail/bkpfail49.stderr
@@ -1,9 +1,10 @@
[1 of 2] Processing p
- [1 of 1] Compiling A[sig] ( p/A.hsig, nothing )
+[1 of 1] Compiling A[sig] ( p/A.hsig, nothing )
[2 of 2] Processing q
- [1 of 3] Compiling A[sig] ( q/A.hsig, nothing )
- [2 of 3] Compiling M ( q/M.hs, nothing )
+[1 of 3] Compiling A[sig] ( q/A.hsig, nothing )
+[2 of 3] Compiling M ( q/M.hs, nothing )
bkpfail49.bkp:11:13: error:
Not in scope: data constructor ‘A.True’
Module ‘A’ does not export ‘True’.
+[3 of 3] Instantiating p
diff --git a/testsuite/tests/count-deps/CountDepsAst.stdout b/testsuite/tests/count-deps/CountDepsAst.stdout
index bde8fc08da..54887612bd 100644
--- a/testsuite/tests/count-deps/CountDepsAst.stdout
+++ b/testsuite/tests/count-deps/CountDepsAst.stdout
@@ -1,4 +1,4 @@
-Found 275 Language.Haskell.Syntax module dependencies
+Found 276 Language.Haskell.Syntax module dependencies
GHC.Builtin.Names
GHC.Builtin.PrimOps
GHC.Builtin.Types
@@ -88,6 +88,7 @@ GHC.Driver.Config.Diagnostic
GHC.Driver.Config.Finder
GHC.Driver.Config.Logger
GHC.Driver.Env
+GHC.Driver.Env.KnotVars
GHC.Driver.Env.Types
GHC.Driver.Errors
GHC.Driver.Errors.Ppr
diff --git a/testsuite/tests/count-deps/CountDepsParser.stdout b/testsuite/tests/count-deps/CountDepsParser.stdout
index 48c1791fed..7718ba68b9 100644
--- a/testsuite/tests/count-deps/CountDepsParser.stdout
+++ b/testsuite/tests/count-deps/CountDepsParser.stdout
@@ -1,4 +1,4 @@
-Found 281 GHC.Parser module dependencies
+Found 282 GHC.Parser module dependencies
GHC.Builtin.Names
GHC.Builtin.PrimOps
GHC.Builtin.Types
@@ -89,6 +89,7 @@ GHC.Driver.Config.Diagnostic
GHC.Driver.Config.Finder
GHC.Driver.Config.Logger
GHC.Driver.Env
+GHC.Driver.Env.KnotVars
GHC.Driver.Env.Types
GHC.Driver.Errors
GHC.Driver.Errors.Ppr
diff --git a/testsuite/tests/driver/T14075/T14075.stdout b/testsuite/tests/driver/T14075/T14075.stdout
index 18f17be1ee..f5fac2d604 100644
--- a/testsuite/tests/driver/T14075/T14075.stdout
+++ b/testsuite/tests/driver/T14075/T14075.stdout
@@ -1,3 +1,4 @@
[1 of 4] Compiling O ( O.hs, O.o )
[2 of 4] Compiling F[boot] ( F.hs-boot, F.o-boot )
-[3 of 4] Compiling F ( F.hs, F.o )
+[3 of 4] Compiling V ( V.hs, V.o )
+[4 of 4] Compiling F ( F.hs, F.o )
diff --git a/testsuite/tests/driver/T20030/test1/A.hs b/testsuite/tests/driver/T20030/test1/A.hs
new file mode 100644
index 0000000000..0939b424b6
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test1/A.hs
@@ -0,0 +1,3 @@
+module A where
+import B
+import {-# SOURCE #-} C
diff --git a/testsuite/tests/driver/T20030/test1/A.hs-boot b/testsuite/tests/driver/T20030/test1/A.hs-boot
new file mode 100644
index 0000000000..7a3fe29d8e
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test1/A.hs-boot
@@ -0,0 +1,2 @@
+module A where
+
diff --git a/testsuite/tests/driver/T20030/test1/B.hs b/testsuite/tests/driver/T20030/test1/B.hs
new file mode 100644
index 0000000000..f547edd059
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test1/B.hs
@@ -0,0 +1,2 @@
+module B where
+import {-# SOURCE #-} A
diff --git a/testsuite/tests/driver/T20030/test1/C.hs b/testsuite/tests/driver/T20030/test1/C.hs
new file mode 100644
index 0000000000..e1ec081d7d
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test1/C.hs
@@ -0,0 +1,2 @@
+module C where
+import A
diff --git a/testsuite/tests/driver/T20030/test1/C.hs-boot b/testsuite/tests/driver/T20030/test1/C.hs-boot
new file mode 100644
index 0000000000..5831959653
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test1/C.hs-boot
@@ -0,0 +1 @@
+module C where
diff --git a/testsuite/tests/driver/T20030/test1/D.hs b/testsuite/tests/driver/T20030/test1/D.hs
new file mode 100644
index 0000000000..2a69831ec3
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test1/D.hs
@@ -0,0 +1,2 @@
+module D where
+import {-# SOURCE #-} A
diff --git a/testsuite/tests/driver/T20030/test1/E.hs b/testsuite/tests/driver/T20030/test1/E.hs
new file mode 100644
index 0000000000..0861ef3a17
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test1/E.hs
@@ -0,0 +1,2 @@
+module E where
+import H
diff --git a/testsuite/tests/driver/T20030/test1/E.hs-boot b/testsuite/tests/driver/T20030/test1/E.hs-boot
new file mode 100644
index 0000000000..b5e8daaa2e
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test1/E.hs-boot
@@ -0,0 +1,2 @@
+module E where
+import B
diff --git a/testsuite/tests/driver/T20030/test1/F.hs b/testsuite/tests/driver/T20030/test1/F.hs
new file mode 100644
index 0000000000..6fd57e32e1
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test1/F.hs
@@ -0,0 +1,2 @@
+module F where
+import A
diff --git a/testsuite/tests/driver/T20030/test1/G.hs b/testsuite/tests/driver/T20030/test1/G.hs
new file mode 100644
index 0000000000..7287622ff1
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test1/G.hs
@@ -0,0 +1,2 @@
+module G where
+import {-# SOURCE #-} E
diff --git a/testsuite/tests/driver/T20030/test1/H.hs b/testsuite/tests/driver/T20030/test1/H.hs
new file mode 100644
index 0000000000..26a5e7d9ec
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test1/H.hs
@@ -0,0 +1,2 @@
+module H where
+import G
diff --git a/testsuite/tests/driver/T20030/test1/I.hs b/testsuite/tests/driver/T20030/test1/I.hs
new file mode 100644
index 0000000000..c99f7b4a79
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test1/I.hs
@@ -0,0 +1,2 @@
+module I where
+import G
diff --git a/testsuite/tests/driver/T20030/test1/J.hs b/testsuite/tests/driver/T20030/test1/J.hs
new file mode 100644
index 0000000000..4d669568c9
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test1/J.hs
@@ -0,0 +1 @@
+module J where
diff --git a/testsuite/tests/driver/T20030/test1/J.hs-boot b/testsuite/tests/driver/T20030/test1/J.hs-boot
new file mode 100644
index 0000000000..4d669568c9
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test1/J.hs-boot
@@ -0,0 +1 @@
+module J where
diff --git a/testsuite/tests/driver/T20030/test1/K.hs b/testsuite/tests/driver/T20030/test1/K.hs
new file mode 100644
index 0000000000..ac0b673e12
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test1/K.hs
@@ -0,0 +1,2 @@
+module K where
+import {-# SOURCE #-} J
diff --git a/testsuite/tests/driver/T20030/test1/T20030_test1.stderr b/testsuite/tests/driver/T20030/test1/T20030_test1.stderr
new file mode 100644
index 0000000000..81b29def80
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test1/T20030_test1.stderr
@@ -0,0 +1,13 @@
+[ 1 of 13] Compiling A[boot] ( A.hs-boot, A.o-boot )
+[ 2 of 13] Compiling B ( B.hs, B.o )
+[ 3 of 13] Compiling C[boot] ( C.hs-boot, C.o-boot )
+[ 4 of 13] Compiling A ( A.hs, A.o )
+[ 5 of 13] Compiling C ( C.hs, C.o )
+[ 6 of 13] Compiling E[boot] ( E.hs-boot, E.o-boot )
+[ 7 of 13] Compiling G ( G.hs, G.o )
+[ 8 of 13] Compiling H ( H.hs, H.o )
+[ 9 of 13] Compiling E ( E.hs, E.o )
+[10 of 13] Compiling I ( I.hs, I.o )
+[11 of 13] Compiling J[boot] ( J.hs-boot, J.o-boot )
+[12 of 13] Compiling K ( K.hs, K.o )
+[13 of 13] Compiling J ( J.hs, J.o )
diff --git a/testsuite/tests/driver/T20030/test1/all.T b/testsuite/tests/driver/T20030/test1/all.T
new file mode 100644
index 0000000000..43aa5f424c
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test1/all.T
@@ -0,0 +1,6 @@
+test('T20030_test1',
+ [ extra_files([ 'A.hs-boot' , 'A.hs' , 'B.hs' , 'C.hs-boot' , 'C.hs'
+ , 'D.hs' , 'E.hs-boot' , 'E.hs' , 'F.hs' , 'G.hs' , 'H.hs'
+ , 'I.hs', 'J.hs-boot', 'J.hs', 'K.hs' ])
+ ],
+ multimod_compile, ['I.hs K.hs', '-v1'])
diff --git a/testsuite/tests/driver/T20030/test2/L.hs b/testsuite/tests/driver/T20030/test2/L.hs
new file mode 100644
index 0000000000..30a8919778
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test2/L.hs
@@ -0,0 +1,3 @@
+module L where
+import {-# SOURCE #-} M
+import {-# SOURCE #-} O
diff --git a/testsuite/tests/driver/T20030/test2/L.hs-boot b/testsuite/tests/driver/T20030/test2/L.hs-boot
new file mode 100644
index 0000000000..cae1f2e2c5
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test2/L.hs-boot
@@ -0,0 +1 @@
+module L where
diff --git a/testsuite/tests/driver/T20030/test2/M.hs b/testsuite/tests/driver/T20030/test2/M.hs
new file mode 100644
index 0000000000..d2236c1ecd
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test2/M.hs
@@ -0,0 +1,2 @@
+module M where
+import L
diff --git a/testsuite/tests/driver/T20030/test2/M.hs-boot b/testsuite/tests/driver/T20030/test2/M.hs-boot
new file mode 100644
index 0000000000..de9a6f0784
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test2/M.hs-boot
@@ -0,0 +1,2 @@
+module M where
+import {-# SOURCE #-} L
diff --git a/testsuite/tests/driver/T20030/test2/O.hs b/testsuite/tests/driver/T20030/test2/O.hs
new file mode 100644
index 0000000000..429e1ac50b
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test2/O.hs
@@ -0,0 +1,3 @@
+module O where
+import {-# SOURCE #-} L
+import {-# SOURCE #-} M
diff --git a/testsuite/tests/driver/T20030/test2/O.hs-boot b/testsuite/tests/driver/T20030/test2/O.hs-boot
new file mode 100644
index 0000000000..230b9e3014
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test2/O.hs-boot
@@ -0,0 +1 @@
+module O where
diff --git a/testsuite/tests/driver/T20030/test2/T20030_test2.stderr b/testsuite/tests/driver/T20030/test2/T20030_test2.stderr
new file mode 100644
index 0000000000..1597ec42a5
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test2/T20030_test2.stderr
@@ -0,0 +1,6 @@
+[1 of 6] Compiling L[boot] ( L.hs-boot, L.o-boot )
+[2 of 6] Compiling M[boot] ( M.hs-boot, M.o-boot )
+[3 of 6] Compiling O[boot] ( O.hs-boot, O.o-boot )
+[4 of 6] Compiling O ( O.hs, O.o )
+[5 of 6] Compiling L ( L.hs, L.o )
+[6 of 6] Compiling M ( M.hs, M.o )
diff --git a/testsuite/tests/driver/T20030/test2/all.T b/testsuite/tests/driver/T20030/test2/all.T
new file mode 100644
index 0000000000..7b0ae0ec4d
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test2/all.T
@@ -0,0 +1,4 @@
+test('T20030_test2',
+ [ extra_files([ 'L.hs', 'L.hs-boot', 'M.hs', 'M.hs-boot', 'O.hs', 'O.hs-boot' ])
+ ],
+ multimod_compile, ['O.hs', '-v1'])
diff --git a/testsuite/tests/driver/T20030/test3/L.hs b/testsuite/tests/driver/T20030/test3/L.hs
new file mode 100644
index 0000000000..2188d6e9d4
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test3/L.hs
@@ -0,0 +1,4 @@
+module L where
+import {-# SOURCE #-} M
+import {-# SOURCE #-} O
+-- import N
diff --git a/testsuite/tests/driver/T20030/test3/L.hs-boot b/testsuite/tests/driver/T20030/test3/L.hs-boot
new file mode 100644
index 0000000000..cae1f2e2c5
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test3/L.hs-boot
@@ -0,0 +1 @@
+module L where
diff --git a/testsuite/tests/driver/T20030/test3/M.hs b/testsuite/tests/driver/T20030/test3/M.hs
new file mode 100644
index 0000000000..d2236c1ecd
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test3/M.hs
@@ -0,0 +1,2 @@
+module M where
+import L
diff --git a/testsuite/tests/driver/T20030/test3/M.hs-boot b/testsuite/tests/driver/T20030/test3/M.hs-boot
new file mode 100644
index 0000000000..de9a6f0784
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test3/M.hs-boot
@@ -0,0 +1,2 @@
+module M where
+import {-# SOURCE #-} L
diff --git a/testsuite/tests/driver/T20030/test3/N.hs b/testsuite/tests/driver/T20030/test3/N.hs
new file mode 100644
index 0000000000..3fe640c1e6
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test3/N.hs
@@ -0,0 +1,3 @@
+module N where
+-- import {-# SOURCE #-} M
+import O
diff --git a/testsuite/tests/driver/T20030/test3/N.hs-boot b/testsuite/tests/driver/T20030/test3/N.hs-boot
new file mode 100644
index 0000000000..197e2eea70
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test3/N.hs-boot
@@ -0,0 +1 @@
+module N where
diff --git a/testsuite/tests/driver/T20030/test3/O.hs b/testsuite/tests/driver/T20030/test3/O.hs
new file mode 100644
index 0000000000..429e1ac50b
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test3/O.hs
@@ -0,0 +1,3 @@
+module O where
+import {-# SOURCE #-} L
+import {-# SOURCE #-} M
diff --git a/testsuite/tests/driver/T20030/test3/O.hs-boot b/testsuite/tests/driver/T20030/test3/O.hs-boot
new file mode 100644
index 0000000000..230b9e3014
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test3/O.hs-boot
@@ -0,0 +1 @@
+module O where
diff --git a/testsuite/tests/driver/T20030/test3/T20030_test3.stderr b/testsuite/tests/driver/T20030/test3/T20030_test3.stderr
new file mode 100644
index 0000000000..91c3869e70
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test3/T20030_test3.stderr
@@ -0,0 +1,7 @@
+[1 of 7] Compiling L[boot] ( L.hs-boot, L.o-boot )
+[2 of 7] Compiling M[boot] ( M.hs-boot, M.o-boot )
+[3 of 7] Compiling O[boot] ( O.hs-boot, O.o-boot )
+[4 of 7] Compiling O ( O.hs, O.o )
+[5 of 7] Compiling L ( L.hs, L.o )
+[6 of 7] Compiling M ( M.hs, M.o )
+[7 of 7] Compiling N ( N.hs, N.o )
diff --git a/testsuite/tests/driver/T20030/test3/all.T b/testsuite/tests/driver/T20030/test3/all.T
new file mode 100644
index 0000000000..7cbb410a3d
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test3/all.T
@@ -0,0 +1,4 @@
+test('T20030_test3',
+ [ extra_files([ 'L.hs', 'L.hs-boot', 'M.hs', 'M.hs-boot', 'N.hs', 'N.hs-boot', 'O.hs', 'O.hs-boot' ])
+ ],
+ multimod_compile, ['O.hs N.hs', '-v1'])
diff --git a/testsuite/tests/driver/T20030/test4/L1.hs b/testsuite/tests/driver/T20030/test4/L1.hs
new file mode 100644
index 0000000000..bbf0f06b62
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test4/L1.hs
@@ -0,0 +1,4 @@
+module L1 where
+
+import L1_1
+import L2_1
diff --git a/testsuite/tests/driver/T20030/test4/L1.hs-boot b/testsuite/tests/driver/T20030/test4/L1.hs-boot
new file mode 100644
index 0000000000..8a9eaee92d
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test4/L1.hs-boot
@@ -0,0 +1 @@
+module L1 where
diff --git a/testsuite/tests/driver/T20030/test4/L1_1.hs b/testsuite/tests/driver/T20030/test4/L1_1.hs
new file mode 100644
index 0000000000..ac31c988ee
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test4/L1_1.hs
@@ -0,0 +1,2 @@
+module L1_1 where
+import {-# SOURCE #-} L1
diff --git a/testsuite/tests/driver/T20030/test4/L2.hs b/testsuite/tests/driver/T20030/test4/L2.hs
new file mode 100644
index 0000000000..46ac69643a
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test4/L2.hs
@@ -0,0 +1,3 @@
+module L2 where
+import L2_1
+import M
diff --git a/testsuite/tests/driver/T20030/test4/L2.hs-boot b/testsuite/tests/driver/T20030/test4/L2.hs-boot
new file mode 100644
index 0000000000..160fae71ae
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test4/L2.hs-boot
@@ -0,0 +1 @@
+module L2 where
diff --git a/testsuite/tests/driver/T20030/test4/L2_1.hs b/testsuite/tests/driver/T20030/test4/L2_1.hs
new file mode 100644
index 0000000000..95875e7382
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test4/L2_1.hs
@@ -0,0 +1,2 @@
+module L2_1 where
+import {-# SOURCE #-} L2
diff --git a/testsuite/tests/driver/T20030/test4/M.hs b/testsuite/tests/driver/T20030/test4/M.hs
new file mode 100644
index 0000000000..480b67011a
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test4/M.hs
@@ -0,0 +1,3 @@
+module M where
+
+import L1_1
diff --git a/testsuite/tests/driver/T20030/test4/T20030_test4.stderr b/testsuite/tests/driver/T20030/test4/T20030_test4.stderr
new file mode 100644
index 0000000000..a477847202
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test4/T20030_test4.stderr
@@ -0,0 +1,10 @@
+[ 1 of 10] Compiling L2[boot] ( L2.hs-boot, L2.o-boot )
+[ 2 of 10] Compiling L2_1 ( L2_1.hs, L2_1.o )
+[ 3 of 10] Compiling L1[boot] ( L1.hs-boot, L1.o-boot )
+[ 4 of 10] Compiling L1_1 ( L1_1.hs, L1_1.o )
+[ 5 of 10] Compiling M ( M.hs, M.o )
+[ 6 of 10] Compiling L2 ( L2.hs, L2.o )
+[ 7 of 10] Compiling L1 ( L1.hs, L1.o )
+[ 8 of 10] Compiling UOL1 ( UOL1.hs, UOL1.o )
+[ 9 of 10] Compiling UOL1_2 ( UOL1_2.hs, UOL1_2.o )
+[10 of 10] Compiling UOL2 ( UOL2.hs, UOL2.o )
diff --git a/testsuite/tests/driver/T20030/test4/UOL1.hs b/testsuite/tests/driver/T20030/test4/UOL1.hs
new file mode 100644
index 0000000000..41ca42ef9a
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test4/UOL1.hs
@@ -0,0 +1,4 @@
+module UOL1 where
+
+import L1
+import M
diff --git a/testsuite/tests/driver/T20030/test4/UOL1_2.hs b/testsuite/tests/driver/T20030/test4/UOL1_2.hs
new file mode 100644
index 0000000000..246a9b76e0
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test4/UOL1_2.hs
@@ -0,0 +1,4 @@
+module UOL1_2 where
+
+import L1
+import L2
diff --git a/testsuite/tests/driver/T20030/test4/UOL2.hs b/testsuite/tests/driver/T20030/test4/UOL2.hs
new file mode 100644
index 0000000000..eb747ad8e8
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test4/UOL2.hs
@@ -0,0 +1,4 @@
+module UOL2 where
+
+import L2
+import M
diff --git a/testsuite/tests/driver/T20030/test4/all.T b/testsuite/tests/driver/T20030/test4/all.T
new file mode 100644
index 0000000000..96d83bbd94
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test4/all.T
@@ -0,0 +1,6 @@
+test('T20030_test4',
+ [ extra_files([ 'L1_1.hs', 'L1.hs', 'L1.hs-boot', 'L2_1.hs', 'L2.hs',
+ 'L2.hs-boot', 'M.hs', 'UOL1_2.hs', 'UOL1.hs', 'UOL2.hs' ])
+ ],
+ multimod_compile, ['UOL1_2.hs UOL1.hs UOL2.hs', '-v1'])
+
diff --git a/testsuite/tests/driver/T20030/test5/L1.hs b/testsuite/tests/driver/T20030/test5/L1.hs
new file mode 100644
index 0000000000..bbf0f06b62
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test5/L1.hs
@@ -0,0 +1,4 @@
+module L1 where
+
+import L1_1
+import L2_1
diff --git a/testsuite/tests/driver/T20030/test5/L1.hs-boot b/testsuite/tests/driver/T20030/test5/L1.hs-boot
new file mode 100644
index 0000000000..8a9eaee92d
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test5/L1.hs-boot
@@ -0,0 +1 @@
+module L1 where
diff --git a/testsuite/tests/driver/T20030/test5/L1_1.hs b/testsuite/tests/driver/T20030/test5/L1_1.hs
new file mode 100644
index 0000000000..ac31c988ee
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test5/L1_1.hs
@@ -0,0 +1,2 @@
+module L1_1 where
+import {-# SOURCE #-} L1
diff --git a/testsuite/tests/driver/T20030/test5/L2.hs b/testsuite/tests/driver/T20030/test5/L2.hs
new file mode 100644
index 0000000000..fc703e5c85
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test5/L2.hs
@@ -0,0 +1,3 @@
+module L2 where
+import L2_1
+import L1_1
diff --git a/testsuite/tests/driver/T20030/test5/L2.hs-boot b/testsuite/tests/driver/T20030/test5/L2.hs-boot
new file mode 100644
index 0000000000..160fae71ae
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test5/L2.hs-boot
@@ -0,0 +1 @@
+module L2 where
diff --git a/testsuite/tests/driver/T20030/test5/L2_1.hs b/testsuite/tests/driver/T20030/test5/L2_1.hs
new file mode 100644
index 0000000000..95875e7382
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test5/L2_1.hs
@@ -0,0 +1,2 @@
+module L2_1 where
+import {-# SOURCE #-} L2
diff --git a/testsuite/tests/driver/T20030/test5/T20030_test5.stderr b/testsuite/tests/driver/T20030/test5/T20030_test5.stderr
new file mode 100644
index 0000000000..89cdd8afb4
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test5/T20030_test5.stderr
@@ -0,0 +1,9 @@
+[1 of 9] Compiling L1[boot] ( L1.hs-boot, L1.o-boot )
+[2 of 9] Compiling L1_1 ( L1_1.hs, L1_1.o )
+[3 of 9] Compiling L2[boot] ( L2.hs-boot, L2.o-boot )
+[4 of 9] Compiling L2_1 ( L2_1.hs, L2_1.o )
+[5 of 9] Compiling L1 ( L1.hs, L1.o )
+[6 of 9] Compiling L2 ( L2.hs, L2.o )
+[7 of 9] Compiling UOL1 ( UOL1.hs, UOL1.o )
+[8 of 9] Compiling UOL1_2 ( UOL1_2.hs, UOL1_2.o )
+[9 of 9] Compiling UOL2 ( UOL2.hs, UOL2.o )
diff --git a/testsuite/tests/driver/T20030/test5/UOL1.hs b/testsuite/tests/driver/T20030/test5/UOL1.hs
new file mode 100644
index 0000000000..e9a1d9ccce
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test5/UOL1.hs
@@ -0,0 +1,3 @@
+module UOL1 where
+
+import L1
diff --git a/testsuite/tests/driver/T20030/test5/UOL1_2.hs b/testsuite/tests/driver/T20030/test5/UOL1_2.hs
new file mode 100644
index 0000000000..246a9b76e0
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test5/UOL1_2.hs
@@ -0,0 +1,4 @@
+module UOL1_2 where
+
+import L1
+import L2
diff --git a/testsuite/tests/driver/T20030/test5/UOL2.hs b/testsuite/tests/driver/T20030/test5/UOL2.hs
new file mode 100644
index 0000000000..139961ae50
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test5/UOL2.hs
@@ -0,0 +1,3 @@
+module UOL2 where
+
+import L2
diff --git a/testsuite/tests/driver/T20030/test5/all.T b/testsuite/tests/driver/T20030/test5/all.T
new file mode 100644
index 0000000000..98aa41366d
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test5/all.T
@@ -0,0 +1,6 @@
+test('T20030_test5',
+ [ extra_files([ 'L1_1.hs', 'L1.hs', 'L1.hs-boot', 'L2_1.hs', 'L2.hs',
+ 'L2.hs-boot', 'UOL1_2.hs', 'UOL1.hs', 'UOL2.hs' ])
+ ],
+ multimod_compile, ['UOL1_2.hs UOL1.hs UOL2.hs', '-v1'])
+
diff --git a/testsuite/tests/driver/T20030/test6/L1.hs b/testsuite/tests/driver/T20030/test6/L1.hs
new file mode 100644
index 0000000000..8fa4b8a839
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test6/L1.hs
@@ -0,0 +1,3 @@
+module L1 where
+
+import L1_2
diff --git a/testsuite/tests/driver/T20030/test6/L1.hs-boot b/testsuite/tests/driver/T20030/test6/L1.hs-boot
new file mode 100644
index 0000000000..8a9eaee92d
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test6/L1.hs-boot
@@ -0,0 +1 @@
+module L1 where
diff --git a/testsuite/tests/driver/T20030/test6/L1_1.hs b/testsuite/tests/driver/T20030/test6/L1_1.hs
new file mode 100644
index 0000000000..ac31c988ee
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test6/L1_1.hs
@@ -0,0 +1,2 @@
+module L1_1 where
+import {-# SOURCE #-} L1
diff --git a/testsuite/tests/driver/T20030/test6/L1_2.hs b/testsuite/tests/driver/T20030/test6/L1_2.hs
new file mode 100644
index 0000000000..ed17d62900
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test6/L1_2.hs
@@ -0,0 +1,3 @@
+module L1_2 where
+import L1_1
+import L2_1
diff --git a/testsuite/tests/driver/T20030/test6/L2.hs b/testsuite/tests/driver/T20030/test6/L2.hs
new file mode 100644
index 0000000000..49eae64d9b
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test6/L2.hs
@@ -0,0 +1,2 @@
+module L2 where
+import L2_2
diff --git a/testsuite/tests/driver/T20030/test6/L2.hs-boot b/testsuite/tests/driver/T20030/test6/L2.hs-boot
new file mode 100644
index 0000000000..160fae71ae
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test6/L2.hs-boot
@@ -0,0 +1 @@
+module L2 where
diff --git a/testsuite/tests/driver/T20030/test6/L2_1.hs b/testsuite/tests/driver/T20030/test6/L2_1.hs
new file mode 100644
index 0000000000..95875e7382
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test6/L2_1.hs
@@ -0,0 +1,2 @@
+module L2_1 where
+import {-# SOURCE #-} L2
diff --git a/testsuite/tests/driver/T20030/test6/L2_2.hs b/testsuite/tests/driver/T20030/test6/L2_2.hs
new file mode 100644
index 0000000000..f88c5c3dee
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test6/L2_2.hs
@@ -0,0 +1,3 @@
+module L2_2 where
+import L2_1
+import L1_1
diff --git a/testsuite/tests/driver/T20030/test6/T20030_test6.stderr b/testsuite/tests/driver/T20030/test6/T20030_test6.stderr
new file mode 100644
index 0000000000..bb1f53dc67
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test6/T20030_test6.stderr
@@ -0,0 +1,12 @@
+[ 1 of 12] Compiling L1[boot] ( L1.hs-boot, L1.o-boot )
+[ 2 of 12] Compiling L1_1 ( L1_1.hs, L1_1.o )
+[ 3 of 12] Compiling L2[boot] ( L2.hs-boot, L2.o-boot )
+[ 4 of 12] Compiling L2_1 ( L2_1.hs, L2_1.o )
+[ 5 of 12] Compiling L2_2 ( L2_2.hs, L2_2.o )
+[ 6 of 12] Compiling L1_2 ( L1_2.hs, L1_2.o )
+[ 7 of 12] Compiling L1 ( L1.hs, L1.o )
+[ 8 of 12] Compiling L2 ( L2.hs, L2.o )
+[ 9 of 12] Compiling UOL1 ( UOL1.hs, UOL1.o )
+[10 of 12] Compiling UOL1_1 ( UOL1_1.hs, UOL1_1.o )
+[11 of 12] Compiling UOL1_2 ( UOL1_2.hs, UOL1_2.o )
+[12 of 12] Compiling UOL2 ( UOL2.hs, UOL2.o )
diff --git a/testsuite/tests/driver/T20030/test6/UOL1.hs b/testsuite/tests/driver/T20030/test6/UOL1.hs
new file mode 100644
index 0000000000..e9a1d9ccce
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test6/UOL1.hs
@@ -0,0 +1,3 @@
+module UOL1 where
+
+import L1
diff --git a/testsuite/tests/driver/T20030/test6/UOL1_1.hs b/testsuite/tests/driver/T20030/test6/UOL1_1.hs
new file mode 100644
index 0000000000..684b0f5e71
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test6/UOL1_1.hs
@@ -0,0 +1,3 @@
+module UOL1_1 where
+
+import L1_2
diff --git a/testsuite/tests/driver/T20030/test6/UOL1_2.hs b/testsuite/tests/driver/T20030/test6/UOL1_2.hs
new file mode 100644
index 0000000000..246a9b76e0
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test6/UOL1_2.hs
@@ -0,0 +1,4 @@
+module UOL1_2 where
+
+import L1
+import L2
diff --git a/testsuite/tests/driver/T20030/test6/UOL2.hs b/testsuite/tests/driver/T20030/test6/UOL2.hs
new file mode 100644
index 0000000000..139961ae50
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test6/UOL2.hs
@@ -0,0 +1,3 @@
+module UOL2 where
+
+import L2
diff --git a/testsuite/tests/driver/T20030/test6/all.T b/testsuite/tests/driver/T20030/test6/all.T
new file mode 100644
index 0000000000..a1df9d9b0a
--- /dev/null
+++ b/testsuite/tests/driver/T20030/test6/all.T
@@ -0,0 +1,6 @@
+test('T20030_test6',
+ [ extra_files([ 'L1_1.hs', 'L1_2.hs', 'L1.hs', 'L1.hs-boot', 'L2_1.hs', 'L2_2.hs', 'L2.hs',
+ 'L2.hs-boot', 'UOL1_2.hs', 'UOL1.hs', 'UOL1_1.hs', 'UOL2.hs' ])
+ ],
+ multimod_compile, ['UOL1_1.hs UOL1_2.hs UOL1.hs UOL2.hs', '-v1'])
+
diff --git a/testsuite/tests/driver/recomp-boot/recomp-boot.stdout b/testsuite/tests/driver/recomp-boot/recomp-boot.stdout
index 5c122e2e34..5aa4618bfc 100644
--- a/testsuite/tests/driver/recomp-boot/recomp-boot.stdout
+++ b/testsuite/tests/driver/recomp-boot/recomp-boot.stdout
@@ -2,5 +2,5 @@
[2 of 3] Compiling B ( B.hs, B.o )
[3 of 3] Compiling A ( A.hs, A.o )
[1 of 4] Compiling C[boot] ( C.hs-boot, C.o-boot )
-[3 of 4] Compiling B ( B.hs, B.o ) [Source file changed]
-[4 of 4] Compiling A ( A.hs, A.o ) [B changed]
+[2 of 4] Compiling B ( B.hs, B.o ) [Source file changed]
+[3 of 4] Compiling A ( A.hs, A.o ) [B changed]
diff --git a/testsuite/tests/driver/recomp-boot2/recomp-boot2.stdout b/testsuite/tests/driver/recomp-boot2/recomp-boot2.stdout
index cac737564c..0ad0041e30 100644
--- a/testsuite/tests/driver/recomp-boot2/recomp-boot2.stdout
+++ b/testsuite/tests/driver/recomp-boot2/recomp-boot2.stdout
@@ -4,7 +4,7 @@
[4 of 5] Compiling M ( M.hs, M.o )
[5 of 5] Compiling Top ( Top.hs, Top.o )
[1 of 6] Compiling C[boot] ( C.hs-boot, C.o-boot )
-[3 of 6] Compiling B ( B.hs, B.o ) [Source file changed]
-[4 of 6] Compiling A ( A.hs, A.o ) [B changed]
+[2 of 6] Compiling B ( B.hs, B.o ) [Source file changed]
+[3 of 6] Compiling A ( A.hs, A.o ) [B changed]
[5 of 6] Compiling M ( M.hs, M.o ) [A changed]
[6 of 6] Compiling Top ( Top.hs, Top.o ) [M changed]
diff --git a/testsuite/tests/ghci/prog018/prog018.stdout b/testsuite/tests/ghci/prog018/prog018.stdout
index 544ef8e671..23323ebb4b 100644
--- a/testsuite/tests/ghci/prog018/prog018.stdout
+++ b/testsuite/tests/ghci/prog018/prog018.stdout
@@ -1,6 +1,4 @@
[1 of 3] Compiling A ( A.hs, interpreted )
-[2 of 3] Compiling B ( B.hs, interpreted )
-[3 of 3] Compiling C ( C.hs, interpreted )
A.hs:5:1: warning: [-Wincomplete-patterns (in -Wextra)]
Pattern match(es) are non-exhaustive
@@ -9,11 +7,13 @@ A.hs:5:1: warning: [-Wincomplete-patterns (in -Wextra)]
A.hs:8:15: warning: [-Wunused-matches (in -Wextra)]
Defined but not used: ‘x’
+[2 of 3] Compiling B ( B.hs, interpreted )
B.hs:7:1: warning: [-Wunused-imports (in -Wextra)]
The import of ‘Data.Tuple’ is redundant
except perhaps to import instances from ‘Data.Tuple’
To import instances alone, use: import Data.Tuple()
+[3 of 3] Compiling C ( C.hs, interpreted )
C.hs:6:7: error: Variable not in scope: variableNotInScope :: ()
Failed, two modules loaded.
diff --git a/testsuite/tests/plugins/T11244.stderr b/testsuite/tests/plugins/T11244.stderr
index 72f01060db..65245b7f80 100644
--- a/testsuite/tests/plugins/T11244.stderr
+++ b/testsuite/tests/plugins/T11244.stderr
@@ -1,4 +1,6 @@
-<command line>: Could not load module ‘RuleDefiningPlugin’
+
+<no location info>: error:
+ Could not load module ‘RuleDefiningPlugin’
It is a member of the hidden package ‘rule-defining-plugin-0.1’.
You can run ‘:set -package rule-defining-plugin’ to expose it.
(Note: this unloads all the modules in the current scope.)