[GHC] #15702: "-main-is" flag is broken for recent ghc-head

[GHC]

#15702: "-main-is" flag is broken for recent ghc-head
-------------------------------------+-------------------------------------
        Reporter:  terrorjack        |                Owner:  (none)
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:  8.8.1
       Component:  Compiler          |              Version:  8.7
      Resolution:                    |             Keywords:
Operating System:  Linux             |         Architecture:  x86_64
 Type of failure:  Incorrect         |  (amd64)
  error/warning at compile-time      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D5322
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by Krzysztof Gogolewski <krz.gogolewski@…>):

 In [changeset:"0e7790abf7d19d19f84c86dc95e50beb65462d12/ghc" 0e7790a/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="0e7790abf7d19d19f84c86dc95e50beb65462d12"
 Fix trac #15702, as a followon to fix for #13704.

 Summary:
 The effect of this change is that -main-is changes the default
 export list for the main module, but does not apply the same
 change to non-main modules.  This fixes some cases where -main-is
 was used to wrap a module that expected that default behavior
 (exporting `main`, even when that wasn't the main entry point
 name).

 Reviewers: mpickering, monoidal, bgamari

 Subscribers: rwbarton, carter

 GHC Trac Issues: #13704, #15702

 Differential Revision: https://phabricator.haskell.org/D5322
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15702#comment:6>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler