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| author | Richard Eisenberg <rae@richarde.dev> | 2019-12-11 15:58:56 +0000 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2020-01-12 21:29:27 -0500 |
| commit | 350e2b78788d47255d27489dfc62d664498b5de4 (patch) | |
| tree | 50f2f1982c9f120e6b8aac1970579d34333cd16a /testsuite/tests/patsyn/should_fail/T14552.stderr | |
| parent | 9129210f7e9937c1065330295f06524661575839 (diff) | |
| download | haskell-350e2b78788d47255d27489dfc62d664498b5de4.tar.gz | |
Don't zap to Any; error instead
This changes GHC's treatment of so-called Naughty Quantification
Candidates to issue errors, instead of zapping to Any.
Close #16775.
No new test cases, because existing ones cover this well.
Diffstat (limited to 'testsuite/tests/patsyn/should_fail/T14552.stderr')
| -rw-r--r-- | testsuite/tests/patsyn/should_fail/T14552.stderr | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/testsuite/tests/patsyn/should_fail/T14552.stderr b/testsuite/tests/patsyn/should_fail/T14552.stderr new file mode 100644 index 0000000000..b9b6b8448b --- /dev/null +++ b/testsuite/tests/patsyn/should_fail/T14552.stderr @@ -0,0 +1,8 @@ + +T14552.hs:22:9: error: + • Cannot generalise type; skolem ‘k’ would escape its scope + if I tried to quantify (aa0 :: k) in this type: + forall k (w :: k --> *). Exp a0 (F @k @(*) w aa0) + (Indeed, I sometimes struggle even printing this correctly, + due to its ill-scoped nature.) + • In the declaration for pattern synonym ‘FOO’ |