[commit: ghc] ghc-8.2: Make IfaceAxiom typechecking lazier. (31c5c7c)

[git at git.haskell.org]

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

On branch  : ghc-8.2
Link       : http://ghc.haskell.org/trac/ghc/changeset/31c5c7c5ba8587d6e06782c260db1b3313a05df6/ghc

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commit 31c5c7c5ba8587d6e06782c260db1b3313a05df6
Author: Edward Z. Yang <ezyang at cs.stanford.edu>
Date:   Thu Jul 20 11:30:46 2017 -0400

    Make IfaceAxiom typechecking lazier.
    
    Fixes #13803, but adds a note about a yet to be fixed #13981.
    
    Signed-off-by: Edward Z. Yang <ezyang at cs.stanford.edu>
    
    Test Plan: validate
    
    Reviewers: bgamari, austin
    
    Reviewed By: bgamari
    
    Subscribers: simonpj, rwbarton, thomie
    
    GHC Trac Issues: #13803
    
    Differential Revision: https://phabricator.haskell.org/D3742
    
    (cherry picked from commit fdb6a5bfd545094782fb539951b561ac2467443d)


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31c5c7c5ba8587d6e06782c260db1b3313a05df6
 compiler/iface/TcIface.hs                          |  9 ++-
 compiler/typecheck/FamInst.hs                      | 69 ++++++++++++++++++----
 testsuite/tests/driver/T13803/D.hs                 |  5 ++
 testsuite/tests/driver/T13803/E.hs                 | 11 ++++
 testsuite/tests/driver/T13803/E.hs-boot            |  1 +
 .../tests/{cabal/pkg02 => driver/T13803}/Makefile  |  2 +
 testsuite/tests/driver/T13803/T13803.stdout        |  5 ++
 testsuite/tests/driver/T13803/Y.hs                 |  6 ++
 testsuite/tests/driver/T13803/Y.hs-boot            |  3 +
 testsuite/tests/driver/T13803/all.T                |  4 ++
 10 files changed, 103 insertions(+), 12 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 31c5c7c5ba8587d6e06782c260db1b3313a05df6