[commit: ghc] wip/rae-new-coercible: Better error messages, now unwraps data instances. (f2e585b)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : wip/rae-new-coercible
Link       : http://ghc.haskell.org/trac/ghc/changeset/f2e585b3dace1757a83d9a6a1d1ab1fa20a8d21a/ghc

>---------------------------------------------------------------

commit f2e585b3dace1757a83d9a6a1d1ab1fa20a8d21a
Author: Richard Eisenberg <eir at cis.upenn.edu>
Date:   Mon Dec 1 22:03:04 2014 -0500

    Better error messages, now unwraps data instances.


>---------------------------------------------------------------

f2e585b3dace1757a83d9a6a1d1ab1fa20a8d21a
 compiler/coreSyn/CoreArity.lhs                     |   2 +-
 compiler/deSugar/DsCCall.lhs                       |   4 +-
 compiler/stranal/WwLib.hs                          |   2 +-
 compiler/typecheck/Inst.lhs                        |   8 +-
 compiler/typecheck/TcCanonical.lhs                 |  43 ++++---
 compiler/typecheck/TcErrors.lhs                    |  36 +++++-
 compiler/typecheck/TcEvidence.lhs                  |  27 ++--
 compiler/typecheck/TcMType.lhs                     |   4 +
 compiler/typecheck/TcRnTypes.lhs                   |   9 ++
 compiler/types/Coercion.hs                         |  80 ++++++------
 compiler/types/FamInstEnv.hs                       | 143 ++++++++++++---------
 .../tests/indexed-types/should_fail/T9580.stderr   |   6 +-
 .../typecheck/should_fail/TcCoercibleFail.stderr   |  47 +++----
 .../tests/typecheck/should_run/TcCoercible.hs      |  13 +-
 14 files changed, 244 insertions(+), 180 deletions(-)

Diff suppressed because of size. To see it, use:

    git diff-tree --root --patch-with-stat --no-color --find-copies-harder --ignore-space-at-eol --cc f2e585b3dace1757a83d9a6a1d1ab1fa20a8d21a