Two days old build breakage on i386.

[Johan Tibell]

Just to make sure this is the same breakage, are you on an i386 Windows
machine? If so git revert d8abf85f8ca176854e9d5d0b12371c4bc402aac3
and 04dd7cb3423f1940242fdfe2ea2e3b8abd68a177 to get unstuck.


On Thu, Jun 26, 2014 at 2:13 PM, Simon Peyton Jones <simonpj at microsoft.com>
wrote:

> Aaaargh!  Once again the Windows build is broken.  I am utterly stalled.
>
> Moreover -fregs-graph and -fregs-iterative now *silently* do nothing.  At
> least they should elicit warnings saying that they are disabled pending the
> fix to X and Y.
>
> Please can someone bisect to find out which patch is the culprit?
>
> I wish we had a more systematic way to find this out. I hate being the
> main person who gets stuck because some unrelated change has broken the
> Windows build.  (Thanks for Karel, who got to it a day before me.)
>
> Thanks
>
> Simon
>
> | -----Original Message-----
> | From: ghc-devs [mailto:ghc-devs-bounces at haskell.org] On Behalf Of Karel
> | Gardas
> | Sent: 26 June 2014 09:56
> | To: ghc-devs; Johan Tibell
> | Subject: Two days old build breakage on i386.
> |
> |
> | 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 <johan.tibell at gmail.com>
> | Date:   Mon Jun 9 11:43:21 2014 +0200
> |
> | triggers that issue? I'm not claiming that the commit is actual culprit,
> | this may be just recently un-hidden issue in linear regs allocator on
> | i386!
> |
> | Thanks!
> | Karel
> | _______________________________________________
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> | ghc-devs at haskell.org
> | http://www.haskell.org/mailman/listinfo/ghc-devs
>
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