[GHC] #14218: GHC.Stack.HasCallStack not compatible with constraint synonyms

[GHC]

#14218: GHC.Stack.HasCallStack not compatible with constraint synonyms
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        Reporter:  ntc2              |                Owner:  (none)
            Type:  bug               |               Status:  merge
        Priority:  normal            |            Milestone:  8.2.2
       Component:  Compiler          |              Version:  8.2.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
                                     |  typecheck/should_run/T14218
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Simon Peyton Jones <simonpj@…>):

 In [changeset:"c41ccbfa8aaeb99dd9a36cb3d99993f0fa039cdc/ghc"
 c41ccbfa/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="c41ccbfa8aaeb99dd9a36cb3d99993f0fa039cdc"
 Omit Typeable from the "naturally coherent" list

 In doing something else (Trac #14218) I tripped over the
 definition of "naturally coherent" classes.  This patch

 - Cocuments properly what that means

 - Removes Typeable from the list, because now we know what
   it meams, Typeable clearly doesn't belong.

 No regressions.

 (Actually the term "naturally coherent" seems a bit off.
 More like "invertible" or something.  But I left it.)
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14218#comment:9>
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