1 files changed, 29 insertions, 0 deletions
diff --git a/testsuite/tests/typecheck/should_compile/tc081.hs b/testsuite/tests/typecheck/should_compile/tc081.hs
new file mode 100644
index 0000000000..03be25659e
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+++ b/testsuite/tests/typecheck/should_compile/tc081.hs
@@ -0,0 +1,29 @@
+-- !!! an example Simon made up
+--
+module ShouldSucceed where
+
+f x = (x+1, x<3, g True, g 'c')
+	where
+	g y = if x>2 then [] else [y]
+{-
+Here the type-check of g will yield an LIE with an Ord dict
+for x.  g still has type forall a. a -> [a].  The dictionary is
+free, bound by the x.
+
+It should be ok to add the signature:
+-}
+
+f2 x = (x+1, x<3, g2 True, g2 'c')
+	where
+	-- NB: this sig:
+	g2 :: a -> [a]
+	g2 y = if x>2 then [] else [y]
+{-
+or to write:
+-}
+
+f3 x = (x+1, x<3, g3 True, g3 'c')
+	where
+	-- NB: this line:
+        g3 :: a -> [a]
+	g3 = (\ y -> if x>2 then [] else [y])::(a -> [a])