[GHC] #14708: GHC panics when linking with an archive and using an annotation

23 Jan 2018

      #14708: GHC panics when linking with an archive and using an annotation
-------------------------------------+-------------------------------------
           Reporter:  tchajed        |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  8.2.2
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:  x86_64         |   Type of failure:  Compile-time
  (amd64)                            |  crash or panic
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
-------------------------------------+-------------------------------------
 GHC panics when compiling code with an annotation and linking with an
 archive (a `.a` file). I think this is the same as #9438, but I have a
 really simple test case consisting of the following two files:

 {{{#!c
 // add.c
 int add2(int x, int y) { return x + y; }
 }}}

 {{{#!hs
 -- app.hs
 {-# ANN module () #-}

 main :: IO ()
 main = return ()
 }}}

 First I make an archive:
 {{{
 $ gcc -c add.c -o add.o
 $ ar libadd.a add.o
 }}}

 And then the following fails:
 {{{
 $ ghc -ladd -L. app.hs
 [1 of 1] Compiling Main             ( app.hs, app.o )
 ghc: panic! (the 'impossible' happened)
   (GHC version 8.2.2 for x86_64-apple-darwin):
         Loading archives not supported

 Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug

 make: *** [app] Error 1
 }}}

 The attached tar.gz has these source files and a Makefile to run the
 above. I've tested it on OS X 10.11 and Linux, both with GHC 8.2.2, and
 the behavior is the same.

-- 
Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14708
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