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The function was added to base with base-4.11 (GHC 8.4)
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There is no issue with nested splices as they do not require any compile
time code execution. All execution is delayed until the top-level
splice.
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This documentation-only patch fixes #17793
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Compl Yue noticed that the linker was dumping the link map on SmartOS. This is
because Smartos uses the Solaris linker, which uses the `-64` flag, not
`-m64` like Gnu ld, to indicate that it should link for 64-bits. Fix the
configure script to handle the Solaris linker correctly.
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Previously we would assert that threads which are sending a
`MSG_THROWTO` message must have their blocking status be blocked on the
message. In the usual case of a thread throwing to another thread this
is guaranteed by `stg_killThreadzh`. However, `throwToSelf`, used by
the GC to kill threads which ran out of heap, failed to guarantee this.
Noted while debugging #17785.
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usleep was removed in POSIX.1-2008.
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Previously, we would accidentally make constraints like
forall a. C a => forall b. D b => E a b c as we traversed
superclasses. No longer!
This patch also expands Note [Eagerly expand given superclasses]
to work over quantified constraints; necessary for T16502b.
Close #17202 and #16502.
test cases: typecheck/should_compile/T{17202,16502{,b}}
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For record updates where the `record_expr` is a variable, as in #17783:
```hs
data PartialRec = No
| Yes { a :: Int, b :: Bool }
update No = No
update r@(Yes {}) = r { b = False }
```
We should make use of long distance info in
`-Wincomplete-record-updates` checking. But the call to `matchWrapper`
in the `RecUpd` case didn't specify a scrutinee expression, which would
correspond to the `record_expr` `r` here. That is fixed now.
Fixes #17783.
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Closes #13142
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A little late to the game, but better late than never.
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Configure intree GMP with `--with-pic` instead of patching it. Moreover
the correct patching was only done for x86_64/darwin (see #17799).
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Once again make sure this dumps the STG used for codegen.
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This patch implements the [sugggestion from Simon (PJ)](https://gitlab.haskell.org/ghc/ghc/issues/14628#note_146559):
- Make `TcErrors.getSkolemInfo` return a `SkolemInfo` rather than an `Implication`.
- If `getSkolemInfo` gets `RuntimeUnk`s, just return a new data constructor in `SkolemInfo`, called `RuntimeUnkSkol`.
- In `TcErrors.pprSkols` print something sensible for a `RuntimeUnkSkol`.
The `getSkolemInfo` function paniced while formating suggestions to add type annotations (subfunction `suggestAddSig`)
to a *"Couldn't match type ‘x’ with ‘y’"* error message.
The `getSkolemInfo` function didn't find any Implication value and paniced.
With this patch the `getSkolemInfo` function does no longer panic, if it finds `RuntimeUnkSkol`s.
As the panic occured while processing an error message, we don't need to implement any new error message!
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This commit implements a few Windows-specific fixes which get us from a CI
job that can't even get as far as starting the testsuite driver, to a state
where we can run the entire testssuite (but have test failures to fix).
- Don't forget about a potential extension for the haddock program, when
preparing the bindist.
- Build the timeout program, used by the testsuite driver on Windows in place
of the Python script used elsewhere, using the boot compiler. We could
alternatively build it with the compiler that we're going to test but this
would be a lot more tedious to write.
- Implement a wrapper-script less installation procedure for Windows, in
`hadrian/bindist/Makefile.
- Make dependencies a bit more accurate in the aforementioned Makefile.
- Update Windows/Hadrian CI job accordingly.
This patch fixes #17486.
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This link appears to have been forgotten in
0dad81ca5fd1f63bf8a3b6ad09787559e8bd05c0 .
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This appears to be a cut-and-paste error.
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Allowing the test metric output to be captured to a file, a la
the METRIC_FILE environment variable of the make build system.
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When requesting more than BLOCKS_PER_MBLOCK blocks allocGroup can return a
different number of blocks than requested. Here we use the number of
requested blocks, however arenaFree will subtract the actual number of
blocks we got from arena_blocks (possibly) resulting in a negative value
and triggering ASSERT(arena_blocks >= 0).
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The comment in GHC.Base claimed that ($) couldn't be used in that module
as it was wired-in. However, this is no longer true; ($) is merely known
key and is defined in Haskell (with a RuntimeRep-polymorphic type) in
GHC.Base.
The one piece of magic that ($) retains is that it a special typing
rule to allow type inference with higher-rank types
(e.g. `runST $ blah`; see Note [Typing rule for ($)] in TcExpr).
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The bug seems to be fixed in the meantime, make sure it stays fixed.
Closes #12760
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This is in preparation of backwards-incompatible changes in happy.
See https://github.com/simonmar/happy/issues/166
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While single-line comments are supported by C99, dtrace on SmartOS
apparently doesn't support them yet.
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This fixes #17763
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cc/ @pepeiborra
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This alternative is redundant and triggers no warning when building with 8.6.5
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Closes #17094.
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This is the full testcase for T15316.
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This will hopefully fix #17631.
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This adopts a patch from NetBSD's packaging fixing the `GhcThreaded`
option of the make build system. In addition we introduce a `ghcThreaded`
option in hadrian's `Flavour` type.
Also fix Hadrian's treatment of the `Use Threaded` entry in `settings`.
Previously it would incorrectly claim `Use Threaded = True` if we were
building the `threaded` runtime way. However, this is inconsistent with
the `make` build system, which defines it to be whether the `ghc`
executable is linked against the threaded runtime.
Fixes #17692.
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unpackCString# is a recursive function which for each iteration
returns a Cons cell containing the current Char, and a thunk for
unpacking the rest of the string.
In this patch we change from storing addr + offset inside this thunk
to storing only the addr, simply incrementing the address on each
iteration.
This saves one word of allocation per unpacked character.
For a program like "main = print "<largishString>" this amounts
to 2-3% fewer % in bytes allocated.
I also removed the now redundant local unpack definitions.
This removes one call per unpack operation.
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Fixes #17612 by adding a `cabal.configure.opts` key for
`hadrian.settings`.
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This implements the warning proposed in option (B) of the
Data.List.singleton CLC [discussion][].
This warning, which is included in `-Wcompat` is intended to help users
identify imports of modules that will change incompatibly in future GHC
releases. This currently only includes `Data.List` due to the expected
specialisation and addition of `Data.List.singleton`.
Fixes #17244.
[discussion]: https://groups.google.com/d/msg/haskell-core-libraries/q3zHLmzBa5E/PmlAs_kYAQAJ
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If hs_try_putmvar was called through an unsafe import, it would lose track of the running cap causing a deadlock
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There are two main payloads of this patch:
1. This introduces IsPass, which allows e.g. printing
code to ask what pass it is running in (Renamed vs
Typechecked) and thus print extension fields. See
Note [IsPass] in Hs.Extension
2. This moves the HsWrap constructor into an extension
field, where it rightly belongs. This is done for
HsExpr and HsCmd, but not for HsPat, which is left
as an exercise for the reader.
There is also some refactoring around SyntaxExprs, but this
is really just incidental.
This patch subsumes !1721 (sorry @chreekat).
Along the way, there is a bit of refactoring in GHC.Hs.Extension,
including the removal of NameOrRdrName in favor of NoGhcTc.
This meant that we had no real need for GHC.Hs.PlaceHolder, so
I got rid of it.
Updates haddock submodule.
-------------------------
Metric Decrease:
haddock.compiler
-------------------------
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```
main = do
print $ g [1..100] a
where g xs x = map (`mod` x) xs
a :: Int = 324
```
The above program previously attributed the cost of computing 324 to a cost
centre named `(...)`, with this change the cost is attributed to `a` instead.
This change only affects simple pattern bindings (decorated variables: type
signatures, parens, ~ annotations and ! annotations).
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