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| author | Richard Eisenberg <rae@richarde.dev> | 2021-01-14 21:36:43 -0500 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2021-01-27 17:41:44 -0500 |
| commit | 189efc39e0cf111bcb6d2ad5d474fcd01a706eb8 (patch) | |
| tree | 420e4ecfc6ddb644c3321a36b95f444933363943 /testsuite/tests/typecheck/should_fail/T19187.hs | |
| parent | 2f689a8bdf0bb6342794e0d8243e86e6cc4f4962 (diff) | |
| download | haskell-189efc39e0cf111bcb6d2ad5d474fcd01a706eb8.tar.gz | |
Remove some redundant validity checks.
This commit also consolidates documentation in the user
manual around UndecidableSuperClasses, UndecidableInstances,
and FlexibleContexts.
Close #19186.
Close #19187.
Test case: typecheck/should_compile/T19186,
typecheck/should_fail/T19187{,a}
Diffstat (limited to 'testsuite/tests/typecheck/should_fail/T19187.hs')
| -rw-r--r-- | testsuite/tests/typecheck/should_fail/T19187.hs | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/testsuite/tests/typecheck/should_fail/T19187.hs b/testsuite/tests/typecheck/should_fail/T19187.hs new file mode 100644 index 0000000000..52f0e11c69 --- /dev/null +++ b/testsuite/tests/typecheck/should_fail/T19187.hs @@ -0,0 +1,7 @@ +{-# LANGUAGE UndecidableInstances #-} + +module T19187 where + +data T + +instance Eq Int => Eq T |