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-rw-r--r--src/test/ui/coercion/retslot-cast.rs22
1 files changed, 22 insertions, 0 deletions
diff --git a/src/test/ui/coercion/retslot-cast.rs b/src/test/ui/coercion/retslot-cast.rs
new file mode 100644
index 000000000..ae500cb15
--- /dev/null
+++ b/src/test/ui/coercion/retslot-cast.rs
@@ -0,0 +1,22 @@
+#![allow(warnings)]
+
+pub fn fail(x: Option<&(Iterator<Item=()>+Send)>)
+ -> Option<&Iterator<Item=()>> {
+ // This call used to trigger an LLVM assertion because the return
+ // slot had type "Option<&Iterator>"* instead of
+ // "Option<&(Iterator+Send)>"* -- but this now yields a
+ // compilation error and I'm not sure how to create a comparable
+ // test. To ensure that this PARTICULAR failure doesn't occur
+ // again, though, I've left this test here, so if this ever starts
+ // to compile again, we can adjust the test appropriately (clearly
+ // it should never ICE...). -nmatsakis
+ inner(x) //~ ERROR mismatched types
+}
+
+pub fn inner(x: Option<&(Iterator<Item=()>+Send)>)
+ -> Option<&(Iterator<Item=()>+Send)> {
+ x
+}
+
+
+fn main() {}