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Diffstat (limited to 'testsuite/tests/typecheck/should_fail/tcfail073.hs')
| -rw-r--r-- | testsuite/tests/typecheck/should_fail/tcfail073.hs | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/testsuite/tests/typecheck/should_fail/tcfail073.hs b/testsuite/tests/typecheck/should_fail/tcfail073.hs new file mode 100644 index 0000000000..c52d39ae08 --- /dev/null +++ b/testsuite/tests/typecheck/should_fail/tcfail073.hs @@ -0,0 +1,10 @@ +-- what error do you get if you redefined Prelude instances? + +module ShouldFail where + +f :: (Eq a) => (a,a) -> (a,a) -> Bool +f x y = x == y + +instance Eq a => Eq (a,b) where + (m,n) == (o,p) = m == o + |