numrun012 test fails on i686 works on x86_64

I have built ghc on both x86_64 and i686 for archlinux. make test has no unexpected results on x86_64. On i686, make test has only the following unexpected failure:

=====> numrun012(normal) 831 of 3160 [0, 0, 0]
cd ./numeric/should_run && '/build/src/ghc-7.4.1/inplace/bin/ghc-stage2' -fforce-recomp -dcore-lint -dcmm-lint -dno-debug-output -no-user-package-conf -rtsopts  -fno-ghci-history -o numrun012 numrun012.hs    >numrun012.comp.stderr 2>&1
cd ./numeric/should_run && ./numrun012    </dev/null >numrun012.run.stdout 2>numrun012.run.stderr
Actual stdout output differs from expected:
--- ./numeric/should_run/numrun012.stdout	2012-02-01 18:11:16.000000000 +0000
+++ ./numeric/should_run/numrun012.run.stdout	2012-02-07 23:06:57.413192194 +0000
@@ -1,4 +1,4 @@
-[0,1,5,9,10,14,31,31,32,32,32,32,33]
+[0,1,5,9,10,14,31,31,31,32,32,32,33]
 -2.147483648e9
 -2.1474836e9
 -2.147483648e9
*** unexpected failure for numrun012(normal)

I think I got the failure down to one line:

The following returns 31.000000000000004 on x86_64 and 31.0 on i686:

logBase 2 (fromIntegral 2^31) :: Double

Please let me know if you need anything else from me.

Trac metadata

Trac field	Value
Version	7.4.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Test Suite
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