[GHC] #11487: stg_ap_pp_fast doesn't pass the argument in the arity=1 case

[GHC]

#11487: stg_ap_pp_fast doesn't pass the argument in the arity=1 case
-------------------------------------+-------------------------------------
        Reporter:  rwbarton          |                Owner:  gmainland
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.0.1
       Component:  Runtime System    |              Version:  8.0.1-rc1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Runtime crash     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D1864
       Wiki Page:                    |
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Comment (by Geoffrey Mainland <mainland@…>):

 In [changeset:"6544f8de1ed575378f14b82a2eaa06cab58b2d65/ghc"
 6544f8de/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="6544f8de1ed575378f14b82a2eaa06cab58b2d65"
 Properly track live registers when saving the CCCS.

 Summary:
 When saving the CCCS, we now correctly track the set of live registers and
 pass
 them to the jump_SAVE_CCCS macro. This is now a variadic macro, but
 variadic
 macros are supported by GCC since 3.0 and by all versions of clang, so
 this
 should not be a problem.

 Test Plan:
 ./validate with the following build options:

 ```
 BuildFlavour = quick-llvm
 SRC_HC_OPTS_STAGE1 = -fllvm-fill-undef-with-garbage
 ```

 Reviewers: bgamari, simonmar, austin, rwbarton, simonpj

 Subscribers: thomie

 Differential Revision: https://phabricator.haskell.org/D1864

 GHC Trac Issues: #11487
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11487#comment:20>
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