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Segfault on x86 with -O2

First reported by Kazu Yamamoto in http://www.haskell.org/pipermail/ghc-devs/2013-May/001346.html

On OSX x86 with 7.7.20130530:

$ ghc --make Main -O2 -Wall
[1 of 1] Compiling Main             ( Main.hs, Main.o )
Linking Main ...
$ ./Main
Winner (E {_key = 156, prio = 9.443531728518195e-3}) (LLoser [...]
Before atMost
[E {_key = 2, prio = 6.2447874501499356e-2},[...]prio = 0.35312841343485957}Segmentation fault: 11

It randomly fails with either "Segmentation fault: 11" or "Bus error: 10". Sometimes it succeeds.

With -O it apparently always succeeds.

Trac metadata
Trac field Value
Version 7.7
Type Bug
TypeOfFailure OtherFailure
Priority highest
Resolution Unresolved
Component Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture
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