diff options
Diffstat (limited to 'testsuite/tests/typecheck/should_fail/tcfail208.stderr')
| -rw-r--r-- | testsuite/tests/typecheck/should_fail/tcfail208.stderr | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/testsuite/tests/typecheck/should_fail/tcfail208.stderr b/testsuite/tests/typecheck/should_fail/tcfail208.stderr new file mode 100644 index 0000000000..64200a696d --- /dev/null +++ b/testsuite/tests/typecheck/should_fail/tcfail208.stderr @@ -0,0 +1,13 @@ + +tcfail208.hs:4:19: + Could not deduce (Eq (m a)) arising from a use of `==' + from the context (Monad m, Eq a) + bound by the type signature for + f :: (Monad m, Eq a) => a -> m a -> Bool + at tcfail208.hs:4:1-23 + Possible fix: + add (Eq (m a)) to the context of + the type signature for f :: (Monad m, Eq a) => a -> m a -> Bool + or add an instance declaration for (Eq (m a)) + In the expression: (return x == y) + In an equation for `f': f x y = (return x == y) |