[GHC] #15044: Option to output instance resolution process

[GHC]

#15044: Option to output instance resolution process
-------------------------------------+-------------------------------------
        Reporter:  lyxia             |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.2.2
      Resolution:                    |             Keywords:
                                     |  debug,typeclasses
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #12687            |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by simonpj):

 `-ddump-cs-trace` is really intended for people debugging the constraint
 solver, rather than programmers.  But something very like it should work
 just fine.  It just needs someone to have a go... feel free to ask
 questions.

 I think the tricky bit would be identifying the constraint being solved in
 a way that is meaningful to the programmer.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15044#comment:3>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler