id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc,os,architecture,failure,difficulty,testcase,blockedby,blocking,related
3170,-fregs-graph: GraphOps.coalesceNodes: can't coalesce the same node.,igloo,benl,"If `-fregs-graph` is used then the build fails when compiling `PrimOps.cmm`:
{{{
$ /home/ian/ghc/darcs/ghc/ghc/stage1-inplace/ghc  -Werror -H64m -O0 -fasm -optc-O2 -I../includes -I. -Iparallel -Ism -Ieventlog -DCOMPILING_RTS -package-name rts -static  -I../gmp/gmpbuild -I../libffi/build/include -I. -dcmm-lint     -c PrimOps.cmm -o PrimOps.o -fregs-graph
ghc: panic! (the 'impossible' happened)
  (GHC version 6.11.20090409 for x86_64-unknown-linux):
        GraphOps.coalesceNodes: can't coalesce the same node.

Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
}}}

This blocks #2790.
",bug,closed,high,6.12.1,Compiler,6.10.2,fixed,,,Unknown/Multiple,Unknown/Multiple,,Unknown,,,,