linux/powepc : ghc-stage1 segfaults when building unregisterised

Building unregisterised to test code paths that don't get tested in the registerised compile mode.

The segfault:

"inplace/bin/ghc-stage1" -static  -O -H64m -Wall -Iincludes -Iincludes/dist \
  -Iincludes/dist-derivedconstants/header -Iincludes/dist-ghcconstants/header \
  -Irts -Irts/dist/build -DCOMPILING_RTS -this-unit-id rts -optc-DNOSMP \
  -dcmm-lint -i -irts -irts/dist/build -irts/dist/build/autogen \
  -Irts/dist/build -Irts/dist/build/autogen -O2 -Wnoncanonical-monad-instances \
  -c rts/StgStartup.cmm -o rts/dist/build/StgStartup.o

seems to occur on powerpc, but not on x86_64 or armhf.

Trac metadata

Trac field	Value
Version	8.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
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