Hello,
builders running on i386 building for this platform caught issue which
shows as a build breakage:
ghc-stage1: panic! (the 'impossible' happened)
(GHC version 7.9.20140624 for i386-unknown-linux):
RegAllocLinear.allocRegsAndSpill: no spill candidates
allocating vreg: VirtualRegI n1Q6
assignment: [(c1PV,InMem 2),(n1Q5,InBoth (RealRegSingle 3)
0),(n1Q6,InMem 1),(n1Q7,InMem 3),(n1Q9,InReg (RealRegSingle 2))]
freeRegs: FreeRegs 4282318848
initFreeRegs: FreeRegs 4282318861
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
make[1]: ***
[libraries/ghc-prim/dist-install/build/GHC/PrimopWrappers.o] Error 1
libraries/ghc-prim/ghc.mk:4: recipe for target
'libraries/ghc-prim/dist-install/build/GHC/PrimopWrappers.o' failed
Have a look for example on linux-i386 buildot log here:
http://haskell.inf.elte.hu/builders/validator1-linux-x86-head/18/7.html
Anyway, this happens on Linux, FreeBSD and Solaris buildbots on i386 so
it's OS independent and probably 32bit/i386 platform specific and it's
two days old breakage now. The last two night builds fail on all
mentioned buildbots. I'm not sure but perhaps:
commit d8abf85f8ca176854e9d5d0b12371c4bc402aac3
Author: Johan Tibell