[GHC] #11978: running a profiled build of shake test suite with rts args +RTS -hb -N10 triggers SIGSEGV

[GHC]

#11978: running a profiled build of shake test suite with rts args  +RTS -hb -N10
triggers SIGSEGV
---------------------------------+----------------------------------------
        Reporter:  carter        |                Owner:  erikd
            Type:  bug           |               Status:  patch
        Priority:  highest       |            Milestone:  8.0.2
       Component:  Compiler      |              Version:  8.0.1
      Resolution:                |             Keywords:
Operating System:  MacOS X       |         Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown  |            Test Case:
      Blocked By:                |             Blocking:
 Related Tickets:  #4820         |  Differential Rev(s):  Phab:D2174
       Wiki Page:                |
---------------------------------+----------------------------------------

Comment (by erikd):

 Even with the `MSG_THROWTO` issue with `overwritingClosure()` fixed, I'm
 still getting a failure for the assertion I added. The back trace looks
 like:

 {{{
 T11978b: internal error: ASSERTION FAILED: file
 includes/rts/storage/ClosureMacros.h, line 551

     (GHC version 8.1.20160504 for x86_64_unknown_linux)
     Please report this as a GHC bug:
 http://www.haskell.org/ghc/reportabug

 Program received signal SIGABRT, Aborted.
 [Switching to Thread 0x7fffcaffd700 (LWP 30814)]
 0x00007ffff6ec0478 in __GI_raise (sig=sig at entry=6) at
 ../sysdeps/unix/sysv/linux/raise.c:55
 55      ../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
 (gdb) bt
 #0  0x00007ffff6ec0478 in __GI_raise (sig=sig at entry=6) at
 ../sysdeps/unix/sysv/linux/raise.c:55
 #1  0x00007ffff6ec18fa in __GI_abort () at abort.c:89
 #2  0x00000000004dc8bc in rtsFatalInternalErrorFn (s=0x550808 "ASSERTION
 FAILED: file %s, line %u\n", ap=0x7fffcaff8cb8) at rts/RtsMessages.c:182
 #3  0x00000000004dc4ee in barf (s=0x550808 "ASSERTION FAILED: file %s,
 line %u\n") at rts/RtsMessages.c:46
 #4  0x00000000004dc551 in _assertFail (filename=0x54c3c0
 "includes/rts/storage/ClosureMacros.h", linenum=551) at
 rts/RtsMessages.c:61
 #5  0x00000000004c7127 in overwritingClosure (p=0x200180748) at
 includes/rts/storage/ClosureMacros.h:551
 #6  0x00000000004e031d in threadPaused (cap=0x7b6340, tso=0x200087c00) at
 rts/ThreadPaused.c:310
 #7  0x00000000004f7d51 in stg_returnToSched ()
 #8  0x0000000000000000 in ?? ()
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11978#comment:22>
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