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-rw-r--r--testsuite/tests/linear/should_fail/T21278.hs7
1 files changed, 7 insertions, 0 deletions
diff --git a/testsuite/tests/linear/should_fail/T21278.hs b/testsuite/tests/linear/should_fail/T21278.hs
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index 0000000000..d256637b32
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+++ b/testsuite/tests/linear/should_fail/T21278.hs
@@ -0,0 +1,7 @@
+{-# LANGUAGE LinearTypes #-}
+module T21278 where
+
+data C a = forall p. C (a %p -> a)
+
+f :: C a -> C a
+f b = C (\x -> case b of C g -> g x)