[GHC] #9268: internal error: evacuate(static): strange closure type -385875968

[GHC]

#9268: internal error: evacuate(static): strange closure type -385875968
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              Reporter:  brbr        |            Owner:
                  Type:  bug         |           Status:  new
              Priority:  high        |        Milestone:  7.10.1
             Component:  Compiler    |          Version:  7.8.2
            Resolution:              |         Keywords:
      Operating System:  Linux       |     Architecture:  Unknown/Multiple
       Type of failure:  Building    |       Difficulty:  Unknown
  GHC failed                         |       Blocked By:
             Test Case:              |  Related Tickets:
              Blocking:              |
Differential Revisions:              |
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Comment (by rwbarton):

 Aaaaaaaaa.

 So whatever changes I made to `mk/build.mk` didn't have the expected
 effect, for some reason, and the stage1 compiler was still being built
 with `-fllvm`.

 And of course the bootstrapping compiler has an LLVM mangler too, which
 goes about replacing `@function` with `@object` in the assembly output
 from LLVM.

 But I was building the mangler for the stage1 compiler with `-fllvm`, and
 of course it contains the string constant `@function` so that it knows
 what to replace with `@object`. So when the bootstrapping mangler mangled
 the stage1 mangler it also replaced that ''string constant'' `@function`
 by `@object` meaning the stage1 mangler was actually replacing `@object`
 with `@object`!

 So various things such as `ghczmprim_GHCziTypes_Czh_static_info` still had
 type `@function` after being mangled by the stage1 compiler, which led to
 this crash.

 Maybe we can tell LLVM to output `@object`s in the first place somehow? Or
 be more selective about our mangling...

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9268#comment:7>
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