[GHC] #9176: GHC not generating dyn_hi files

[GHC]

#9176: GHC not generating dyn_hi files
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       Reporter:  heatsink        |             Owner:
           Type:  bug             |            Status:  new
       Priority:  normal          |         Milestone:
      Component:  Compiler        |           Version:  7.9
       Keywords:  dynamic         |  Operating System:  MacOS X
   Architecture:  x86_64 (amd64)  |   Type of failure:  Other
     Difficulty:  Unknown         |         Test Case:
     Blocked By:                  |          Blocking:
Related Tickets:                  |
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 In some situations, GHC terminates successfully and generates a `dyn_o`
 file, but no `dyn_hi` file.  As a result, a package that contains a
 library seems to build successfully, but fails to install.  I narrowed the
 problem down to the following test case.  I compile it with `ghc --make
 -shared -dynamic-too Foo`.  It seems to be Parsec-related, but I don't
 know how to trace it further.

 {{{
 module Foo where
 import Text.ParserCombinators.Parsec
 }}}

 Parsec was installed with `cabal install --reinstall --user --enable-
 shared --disable-library-profiling parsec-3.1.5`.  Some Parsec modules do
 not cause the missing `dyn_hi` file.  For instance, all output files are
 created if Foo imports `Text.Parsec.Pos` instead of
 `Text.ParserCombinators.Parsec`.

 GHC was built from source, commit
 9e10963e394680dbb1b964c66cb428a2aa03df09, compiled by GHC 7.6.3 with XCode
 5.1.1 on OS X 10.9.3.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9176>
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