Comments of curly bracket form, which appear at the end of type deffinitions confuse GHC
$ cat HaskarrowHelloWorld.broken.hs
main :: IO (){-# LINE 8 "" #-}
main = print "Hi"
[timothy@timothy rewrite]$ ghc HaskarrowHelloWorld.broken.hs
[1 of 1] Compiling Main ( HaskarrowHelloWorld.broken.hs, HaskarrowHelloWorld.broken.o )
ghc: panic! (the 'impossible' happened)
(GHC version 7.4.2 for x86_64-unknown-linux):
Prelude.head: empty list
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
[timothy@timothy rewrite]$
$ ghc HaskarrowHelloWorld.working.hs
[1 of 1] Compiling Main ( HaskarrowHelloWorld.working.hs, HaskarrowHelloWorld.working.o )
Linking HaskarrowHelloWorld.working ...
[timothy@timothy rewrite]$ cat HaskarrowHelloWorld.working.hs
main :: IO ()--{-# LINE 8 "" #-}
main = print "Hi"
[timothy@timothy rewrite]$ ./HaskarrowHelloWorld.working
"Hi"
Trac metadata
Trac field |
Value |
Version |
7.4.2 |
Type |
Bug |
TypeOfFailure |
OtherFailure |
Priority |
normal |
Resolution |
Unresolved |
Component |
Compiler |
Test case |
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Differential revisions |
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BlockedBy |
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Related |
|
Blocking |
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CC |
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Operating system |
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Architecture |
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