[GHC] #15393: Regression: Detection of unused imports is imprecise (since GHC 8.0.1)

[GHC]

#15393: Regression: Detection of unused imports is imprecise (since GHC 8.0.1)
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        Reporter:  SimonHengel       |                Owner:  (none)
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.4.1
      Resolution:  duplicate         |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Incorrect         |  Unknown/Multiple
  error/warning at compile-time      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #15393            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by SimonHengel):

 I'm not too excited about this step for the reason that #13064 is not
 "very to the point" and was deprioritize.

 As I see it:

  - This is a regression
  - I gave very clear instructions how to reproduce that regression

 At the very least can somebody with appropriate permissions edit the
 description of #13064 to make it more to the point?  (e.g. the cabal file
 is not at all necessary for a minimal example + even more importantly it
 also misses the point that previously rejected programs are accepted now).

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15393#comment:4>
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