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| author | Alec Theriault <alec.theriault@gmail.com> | 2018-10-02 14:48:00 +0200 |
|---|---|---|
| committer | Krzysztof Gogolewski <krz.gogolewski@gmail.com> | 2018-10-02 16:00:19 +0200 |
| commit | 21efbc7599e39ec93b8b13b7d7b84811226e6f6f (patch) | |
| tree | 89e8ce0e648799b0b5e27bd90c9b719484f9bfba /testsuite/tests/ghci/scripts/T12005.script | |
| parent | e3355b7c5955df8daab0f3fc75fe021f42d21dbb (diff) | |
| download | haskell-21efbc7599e39ec93b8b13b7d7b84811226e6f6f.tar.gz | |
GHCi should not filter instances involving cTuples
Summary: See the new T12005 test case for an example of this.
Test Plan: make TEST=T12005
Reviewers: bgamari, osa1
Reviewed By: osa1
Subscribers: osa1, rwbarton, carter
GHC Trac Issues: #12005
Differential Revision: https://phabricator.haskell.org/D5182
Diffstat (limited to 'testsuite/tests/ghci/scripts/T12005.script')
| -rw-r--r-- | testsuite/tests/ghci/scripts/T12005.script | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/testsuite/tests/ghci/scripts/T12005.script b/testsuite/tests/ghci/scripts/T12005.script new file mode 100644 index 0000000000..a86e7d5e8e --- /dev/null +++ b/testsuite/tests/ghci/scripts/T12005.script @@ -0,0 +1,8 @@ +:set -XKindSignatures -XRank2Types -XConstraintKinds -XAllowAmbiguousTypes -XInstanceSigs + +import Data.Kind + +class Defer (p :: Constraint) where defer :: (p => r) -> r +instance Defer () where defer :: r -> r; defer = id + +:i Defer |