[GHC] #12230: Non-deterministic ghc-iserv terminated error

[GHC]

#12230: Non-deterministic ghc-iserv terminated error
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        Reporter:  ezyang            |                Owner:  simonmar
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.2.1
       Component:  GHCi              |              Version:  8.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonmar):

 ugh.  `ghc-iserv terminated (-11)` means that the ghc-iserv process died
 with a segfault.

 I'm not seeing this here, even with a large number of threads.  But
 concurrency in the test suite shouldn't really affect it, because GHC
 itself and ghc-iserv are both still single-threaded.

 Is there anything unusual about your platform or setup that might give us
 a clue?

 You should have a core dump from `ghc-iserv`.  Can you load it up in gdb
 and see what the stack trace is?

 You can also try `-opti-v` to get debug output about the messages being
 exchanged by GHC and ghc-iserv, but this probably won't help much if the
 problem is non-deterministic.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12230#comment:1>
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