[LLVMbugs] [Bug 21995] Infrequent deadlocks with std::future

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=21995

David Majnemer <david.majnemer at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |INVALID

--- Comment #2 from David Majnemer <david.majnemer at gmail.com> ---
Upon greater reflection, it's been made aware to me that you are not permitted
to race promise::set_value with its destructor.  The only thing that
promise::set_value needs to do atomically is to atomically *update* the promise
object.

see http://stackoverflow.com/a/11448290 and http://stackoverflow.com/a/12527892
for more details.

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