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-rw-r--r--testsuite/tests/typecheck/should_fail/tcfail037.hs11
1 files changed, 11 insertions, 0 deletions
diff --git a/testsuite/tests/typecheck/should_fail/tcfail037.hs b/testsuite/tests/typecheck/should_fail/tcfail037.hs
new file mode 100644
index 0000000000..d2110c755a
--- /dev/null
+++ b/testsuite/tests/typecheck/should_fail/tcfail037.hs
@@ -0,0 +1,11 @@
+-- !!! PreludeCore entities cannot be redefined at the top-level
+--
+module ShouldFail where
+
+data NUM = ONE | TWO
+
+f a b = a + b
+f :: NUM -> NUM -> NUM
+
+ONE + ONE = TWO
+