[GHC] #10375: arm: ghci hits an illegal instruction

[GHC]

#10375: arm: ghci hits an illegal instruction
-------------------------------------+---------------------------------
        Reporter:  erikd             |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:  7.10.2
       Component:  GHCi              |                 Version:  7.10.1
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:  arm
 Type of failure:  GHCi crash        |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
-------------------------------------+---------------------------------

Comment (by erikd):

 Turning the test case into a script:

 {{{
 data X = A | B deriving Eq
 A == A
 }}}

 and running as:

 {{{
 inplace/bin/ghc-stage2 +RTS -Ds -Di -RTS --interactive < ghci-
 segfault.script
 }}}

 results in:

 {{{
 evaluating unknown closure -- yielding to sched
 Object 0xb06446a4 = BLACKHOLE(0xb0619a6c)
     b14ff460: cap 0: thread 17 stopped (yielding)
     b14ff460: --<< thread 17 (ThreadRunGHC) stopped to switch evaluators
     b14ff460: cap 0: running thread 17 (ThreadRunGHC)
 Segmentation fault
 }}}

 The `x86_64/linux` version also has this stuff but doesn't segfault:

 {{{
 evaluating unknown closure -- yielding to sched
 Object 0x7fbea1548150 = BLACKHOLE(0x7fbea1858cb8)
 7fbea22fd700: cap 0: thread 19 stopped (yielding)
 7fbea22fd700: --<< thread 19 (ThreadRunGHC) stopped to switch evaluators
 7fbea22fd700: cap 0: running thread 19 (ThreadRunGHC)
 7fbea22fd700: cap 0: thread 19 stopped (yielding)
 7fbea22fd700: --<< thread 19 (ThreadInterpret) stopped to switch
 evaluators
 7fbea22fd700: cap 0: running thread 19 (ThreadInterpret)
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10375#comment:8>
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