[GHC] #15136: High CPU when asynchronous exception and unblocking retry on TVar raced

[GHC]

#15136: High CPU when asynchronous exception and unblocking retry on TVar raced
-------------------------------------+-------------------------------------
        Reporter:  nshimaza          |                Owner:  osa1
            Type:  bug               |               Status:  merge
        Priority:  highest           |            Milestone:  8.6.1
       Component:  Runtime System    |              Version:  8.4.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Runtime crash     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D4956
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by nshimaza):

 Let me report that my repro code no longer reproduces the issue with
 ghc-8.7.20180715 in my test environment!  (Platform is Docker for Mac
 Version 18.03.1-ce-mac65 (24312).)

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15136#comment:16>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler