[commit: ghc] wip/ghc-8.8-merges: Reject oversaturated VKAs in type family equations (3d923ee)

[git at git.haskell.org]

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

On branch  : wip/ghc-8.8-merges
Link       : http://ghc.haskell.org/trac/ghc/changeset/3d923ee52a7f56f9c4b6ad9cf314a21142b97c49/ghc

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commit 3d923ee52a7f56f9c4b6ad9cf314a21142b97c49
Author: Ryan Scott <ryan.gl.scott at gmail.com>
Date:   Fri Feb 1 19:10:55 2019 -0500

    Reject oversaturated VKAs in type family equations
    
    (cherry picked from commit f0cd728fde9bb582930a616cff8d0c5a178c5e14)


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3d923ee52a7f56f9c4b6ad9cf314a21142b97c49
 compiler/typecheck/TcTyClsDecls.hs                 |  3 +
 compiler/typecheck/TcValidity.hs                   | 68 +++++++++++++++++++++-
 testsuite/tests/typecheck/should_compile/all.T     |  1 -
 .../{should_compile => should_fail}/T15793.hs      |  0
 .../tests/typecheck/should_fail/T15793.stderr      |  5 ++
 testsuite/tests/typecheck/should_fail/T16255.hs    | 21 +++++++
 .../tests/typecheck/should_fail/T16255.stderr      | 10 ++++
 testsuite/tests/typecheck/should_fail/all.T        |  2 +
 8 files changed, 108 insertions(+), 2 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 3d923ee52a7f56f9c4b6ad9cf314a21142b97c49