[GHC] #15508: concprog001 fails with various errors

[GHC]

#15508: concprog001 fails with various errors
-------------------------------------+-------------------------------------
        Reporter:  osa1              |                Owner:  osa1
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.8.1
       Component:  Compiler          |              Version:  8.5
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Runtime crash     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #15571            |  Differential Rev(s):  Phab:D5051
       Wiki Page:                    |  (reverted), Phab:D5165, Phab:D5178
-------------------------------------+-------------------------------------

Comment (by osa1):

 Found another bug. In RaiseAsync.c:

 {{{
             -- RaiseAsync.c:924
             SET_HDR(ap,&stg_AP_STACK_NOUPD_info,
                     ((StgClosure *)frame)->header.prof.ccs /* ToDo */);
 }}}

 We're reading CCS of an underflow frame, but underflow frames do not have
 profiling headers:

 {{{
 typedef struct {
     const StgInfoTable* info;
     struct StgStack_ *next_chunk;
 } StgUnderflowFrame;
 }}}

 I also checked other stack frame definitions in `Closures.h`. Most of them
 have
 a proper header (`StgHeader`), except `StgUnderflowFrame` and `StgRetFun`.
 Simon, should we add proper headers to these frames or is the bug in
 somewhere
 else? I'm not sure when should a stack frame has a proper header (that
 includes
 profiling stuff in profiling builds) vs. just a info ptr.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15508#comment:32>
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