[GHC] #14106: Out of scope errors appear after type errors caused by them

[GHC]

#14106: Out of scope errors appear after type errors caused by them
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        Reporter:  EyalLotem         |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Poor/confusing    |  Unknown/Multiple
  error message                      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonpj):

 I do rather agree.

 Currently, GHC

 * Suppresses warnings if there are any errors
 * Sorts errors/warnings by line number

 Better, I think, would be

 * Sort all messages by severity, most severe first
 * Then, within severity, by line number
 * Ensure that out-of-scope errors are somehow more severe

 There are hooks for all this: all messages have a line number and a
 severity.  But it's not terribly well structured or described, so it might
 take a bit of careful work to implement this ideas.  Nothing actually
 difficult, though.

 Volunteers?

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14106#comment:2>
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