[GHC] #15105: `typecheckModule` from GHC API crashes on MacOS for files with TH

[GHC]

#15105: `typecheckModule` from GHC API crashes on MacOS for files with TH
----------------------------------+----------------------------------------
        Reporter:  harpocrates    |                Owner:  (none)
            Type:  bug            |               Status:  new
        Priority:  high           |            Milestone:  8.6.3
       Component:  GHC API        |              Version:  8.4.2
      Resolution:                 |             Keywords:
Operating System:  MacOS X        |         Architecture:  Unknown/Multiple
 Type of failure:  Runtime crash  |            Test Case:
      Blocked By:                 |             Blocking:
 Related Tickets:                 |  Differential Rev(s):
       Wiki Page:                 |
----------------------------------+----------------------------------------

Comment (by Ben Gamari <ben@…>):

 In [changeset:"254890855ee04762cc0392da19e0c42fc039a718/ghc"
 25489085/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="254890855ee04762cc0392da19e0c42fc039a718"
 rts/MachO: Iterate through N (all) symbols, not M external symbols

 Fixes #15105
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15105#comment:14>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler