[GHC] #15832: returnIO/bindIO destroys runtime explicit stack information in some cases

[GHC]

#15832: returnIO/bindIO destroys runtime explicit stack information in some cases
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        Reporter:  infinity0         |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:
       Component:  Compiler          |              Version:  8.6.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by bgamari):

 * priority:  normal => high


Comment:

 I agree that this is a serious debugging impediment; stack traces are very
 important for the usability of the language in an applied setting. Bumping
 the priority.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15832#comment:8>
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