[GHC] #12466: Typechecker regression: Inaccessible code in a type expected by the context

[GHC]

#12466: Typechecker regression: Inaccessible code in a type expected by the context
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        Reporter:  RyanGlScott       |                Owner:
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.2.1
       Component:  Compiler (Type    |              Version:  8.1
  checker)                           |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  GHC rejects       |  Unknown/Multiple
  valid program                      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonpj):

 Plus this
 {{{
 commit 5eeabe250a1de456f70af07bd3f507a32cb8e10e
 Author: Simon Peyton Jones <simonpj at microsoft.com>
 Date:   Mon Sep 12 22:21:15 2016 +0100

     Test wibbles for commit 03541cba

     I must have failed to validate properly, sorry.
     These testsuite wibbles belong with

       commit 03541cbae50f0d1cdf99120ab88698f29a278159
       Author: Simon Peyton Jones <simonpj at microsoft.com>
       Date:   Fri Sep 9 17:42:42 2016 +0100

           Be less picky about reporing inaccessible code

  testsuite/tests/typecheck/should_fail/FDsFromGivens.hs     | 5 ++++-
  testsuite/tests/typecheck/should_fail/FDsFromGivens.stderr | 4 ++++
  testsuite/tests/typecheck/should_fail/T10715.hs            | 4 +++-
  testsuite/tests/typecheck/should_fail/T10715.stderr        | 4 ++++
  testsuite/tests/typecheck/should_fail/T8392a.hs            | 2 ++
  testsuite/tests/typecheck/should_fail/T8392a.stderr        | 4 ++++
  6 files changed, 21 insertions(+), 2 deletions(-)
 }}}
 This should, I hope, unglue the log-jam of #12220 and #12533.

 Simon

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12466#comment:38>
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