[GHC] #13807: GHC 8.2 nondeterministic with foreign imports

[GHC]

#13807: GHC 8.2 nondeterministic with foreign imports
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        Reporter:  niteria           |                Owner:  niteria
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:
       Component:  Compiler          |              Version:  8.2.1-rc2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Ben Gamari <ben@…>):

 In [changeset:"dcdc391609d6ff902989d806266855901c051608/ghc"
 dcdc3916/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="dcdc391609d6ff902989d806266855901c051608"
 Fix #13807 - foreign import nondeterminism

 The problem was that the generated label included
 a freshly assigned Unique value.

 Test Plan:
 Added a new test and looked at the generated stub:

 ```
  #include "HsFFI.h"
  #ifdef __cplusplus
  extern "C" {
  #endif
  extern HsInt zdmainzdAzdAzuzzlzzgzzg(StgStablePtr the_stableptr);
  extern HsInt zdmainzdAzdAzumkStringWriter(StgStablePtr the_stableptr);
  #ifdef __cplusplus
  }
  #endif
 ```

 ./validate

 Reviewers: simonmar, austin, bgamari

 Reviewed By: simonmar

 Subscribers: rwbarton, thomie

 GHC Trac Issues: #13807

 Differential Revision: https://phabricator.haskell.org/D3633
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13807#comment:4>
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