I have some problems with enabling debugging output. I have broken the compiler
in such a way that
for some programs I'm getting compiler panic when using some of the flags
(-ddump-simpl, -fhpc):
Main.h :: GHC.Types.Float -> GHC.Base.String
[GblId, Arity=1, Str=DmdType]
Main.h =ghc-stage2: panic! (the 'impossible' happened)
(GHC version 7.7.20130422 for x86_64-unknown-linux):
Impossible case alternative
I would like to get output from the assertions and warnings placed in the code,
for example in
this function in simplCore/Simplify.lhs (this is the source of my error
message):
missingAlt :: SimplEnv -> Id -> [InAlt] -> SimplCont -> SimplM (SimplEnv,
OutExpr)
missingAlt env case_bndr _ cont
= WARN( True, ptext (sLit "missingAlt") <+> ppr case_bndr )
return (env, mkImpossibleExpr (contResultType cont))
I recompiled GHC with the -DDEBUG option, but when I add -debug flag during
program compilation I
see no output from WARN directive. Are there any additional options I need to
enable?
Janek
P.S. My build.mk has these lines:
BuildFlavour = quick
ifeq "$(BuildFlavour)" "quick"
SRC_HC_OPTS = -H64m -O0 -fasm
GhcStage1HcOpts = -O -fasm -Werror -Rghc-timing -DDEBUG
GhcStage2HcOpts = -O0 -fasm -Werror -Rghc-timing -DDEBUG
GhcLibHcOpts = -O -fasm
SplitObjs = NO
HADDOCK_DOCS = NO
BUILD_DOCBOOK_HTML = NO
BUILD_DOCBOOK_PS = NO
BUILD_DOCBOOK_PDF = NO
endif
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