[GHC] #15022: Stackage HEAD detected a suspicious change

[GHC]

#15022: Stackage HEAD detected a suspicious change
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        Reporter:  mrkkrp            |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.2.2
      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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Comment (by RyanGlScott):

 Indeed, this ticket is incredibly vague. What exactly is going on here? Is
 this using GHC HEAD? GHC 8.4.1? Something else? The use of the phrase
 "nightly" does not tell me much. Also, you give commit hashes, which I
 can't tell are from GHC or `stm-delay`.

 Are these build logs hosted online somewhere? Is there a list of which
 packages are supposed to build and supposed to fail? (If this really
 //is// GHC HEAD, it would seem likely that you'd run into spurious
 failures more often.) How is it determined that this build failure is
 GHC's fault and not the fault of say, Stackage or a downstream dependency.

 In short, I'm totally lost. Some context here would be desperately
 appreciated.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15022#comment:3>
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