[Bug 1256246] Re: gccgo/arm64: using channels before main starts is unreliable

[Michael Hudson-Doyle]

Reported upstream as https://code.google.com/p/go/issues/detail?id=6861

** Bug watch added: Go Issue Tracker #6861
   http://code.google.com/p/go/issues/detail?id=6861

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Title:
  gccgo/arm64: using channels before main starts is unreliable

Status in “gcc-4.8” package in Ubuntu:
  New

Bug description:
  This is the distilled version of the problem that was causing the gcc
  testsuite to hang -- compile and run the attached.  It hangs for me,
  but only on real hardware: I suspect a race that only occurs on
  multiprocessors.

  For extra fun, it _does not_ hang when compiled with mainline /
  gcc-4.9 as of a few days ago.

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