#4345: Compiler crash building regex-posix version 0.94.1 using ghc 7.0.1-rc1
---------------------------------------------+------------------------------
Reporter: dsf | Owner: simonpj
Type: bug | Status: closed
Priority: highest | Milestone: 7.0.1
Component: Compiler | Version: 7.1
Resolution: fixed | Keywords:
Testcase: simplCore/should_compile/T4345 | Blockedby:
Difficulty: | Os: Linux
Blocking: | Architecture: x86
Failure: Compile-time crash |
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Changes (by simonpj):
* status: new => closed
* testcase: => simplCore/should_compile/T4345
* resolution: => fixed
Comment:
Done. Fixed by
{{{
Thu Oct 7 03:27:20 PDT 2010 [email protected]
* Fix Trac #4345: simplifier bug
This is another long-standing bug, in which there was a possibility
that a loop-breaker could lose its loop-breaker-hood OccInfo,
and then the simplifer re-simplified the expression. Result, either
non-termination or, in the case of #4345, an unbound identifier.
The fix is very simple, in Id.transferPolyIdInfo.
See Note [transferPolyIdInfo].
M ./compiler/basicTypes/Id.lhs -8 +25
}}}
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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4345#comment:11>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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