[GHC] #14264: unregisterised GHC fails buid as: ghc-stage1: panic! (the 'impossible' happened): pprCLbl AsmTempLabel

[GHC]

#14264: unregisterised GHC fails buid as: ghc-stage1: panic! (the 'impossible'
happened): pprCLbl AsmTempLabel
-------------------------------------+-------------------------------------
           Reporter:  slyfox         |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  8.3
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
-------------------------------------+-------------------------------------
 How to repdoruce on amd64:

 {{{
 $ ./configure --enable-unregisterised
 $ make
 }}}

 Build failure:
 {{{
   rts_dist_HC rts/dist/build/PrimOps.o
 ghc-stage1: panic! (the 'impossible' happened)
   (GHC version 8.3.20170920 for x86_64-unknown-linux):
 ghc-stage1: panic! (the 'impossible' happened)
   (GHC version 8.3.20170920 for x86_64-unknown-linux):
         ghc-stage1: panic! (the 'impossible' happened)
   (GHC version 8.3.20170920 for x86_64-unknown-linux):
         pprCLbl AsmTempLabel
 }}}

 Normally UNREG backend has no asm labels.

 changeset:8b007abbeb3045900a11529d907a835080129176 looks vaguely relevant
 as it adds AsmTempLabel in one place. But I did not look in detail yet.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14264>
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