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threaded2 failures in HEAD

I've been trying to track down the cause of some failures in HEAD:

   concurrent/prog001             concprog001 [bad exit code] (threaded2)
   concurrent/should_run          conc023 [bad exit code] (threaded2)
   concurrent/should_run          throwto001 [bad exit code] (threaded2)
   concurrent/should_run          throwto002 [bad exit code] (threaded2)

these are non-deterministic crashes that only happen with -N2 or greater. They probably resulted from the recent rewrite of the RTS .cmm code, but after a day or so spent trying to track down the cause I haven't been able to identify it yet.

Trac metadata
Trac field Value
Version 7.7
Type Bug
TypeOfFailure OtherFailure
Priority highest
Resolution Unresolved
Component Runtime System
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture
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