Abort the build when a Core plugin pass is specified in stage1 compiler

This also makes the behavior the same with frontend plugin errors --
frontend was failing with an exception (`CmdLineError`) while the
simplifier was just ignoring plugins. Now we abort with `CmdLineError`
in both cases with a slightly improved error message.

Test Plan:
- add tests (will add tests once #12197 is implemented)
- validate (done)

Reviewers: austin, bgamari

Subscribers: thomie

Differential Revision: https://phabricator.haskell.org/D2334

GHC Trac Issues: #11690

1 files changed, 3 insertions, 2 deletions

diff --git a/ghc/Main.hs b/ghc/Main.hs
index 5605438f63..1a6cbebe3c 100644
--- a/ghc/Main.hs
+++ b/ghc/Main.hs
@@ -32,6 +32,8 @@ import GHCi.UI          ( interactiveUI, ghciWelcomeMsg, defaultGhciSettings )
 #ifdef GHCI
 import DynamicLoading
 import Plugins
+#else
+import DynamicLoading   ( pluginError )
 #endif
 import Module           ( ModuleName )
 
@@ -841,8 +843,7 @@ dumpPackagesSimple dflags = putMsg dflags (pprPackagesSimple dflags)
 
 doFrontend :: ModuleName -> [(String, Maybe Phase)] -> Ghc ()
 #ifndef GHCI
-doFrontend _ _ =
-    throwGhcException (CmdLineError "not built for interactive use")
+doFrontend modname _ = pluginError [modname]
 #else
 doFrontend modname srcs = do
     hsc_env <- getSession