#2880: GHC panic when printing Unique
-----------------------------+----------------------------------------------
Reporter: sebf | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 6.10.1 | Severity: normal
Keywords: | Testcase:
Os: Unknown/Multiple | Architecture: Unknown/Multiple
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The following program causes panic:
{{{
import UniqSupply
main = mkSplitUniqSupply 'x' >>= print . uniqFromSupply
}}}
The error message is:
{{{
ghcbug: ghcbug: panic! (the 'impossible' happened)
(GHC version 6.10.1 for i386-apple-darwin):
Static flags have not been initialised!
Please call GHC.newSession or GHC.parseStaticFlags early
enough.
}}}
I have encountered this on an Apple !MacBook with GHC 6.10.1 and could
reproduce it on a Linux PC with the same GHC version.
The module !UniqSupply comes from the ghc package which is hidden by
default. So before compiling it (or running it in GHCi) type
{{{
ghc-pkg expose ghc
}}}
in a shell.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2880>
GHC <http://www.haskell.org/ghc/>
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