1 files changed, 19 insertions, 0 deletions
diff --git a/tests/ui/unboxed-closures/issue-18661.rs b/tests/ui/unboxed-closures/issue-18661.rs
new file mode 100644
index 000000000..e24272432
--- /dev/null
+++ b/tests/ui/unboxed-closures/issue-18661.rs
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+// run-pass
+// Test that param substitutions from the correct environment are
+// used when codegenning unboxed closure calls.
+
+// pretty-expanded FIXME #23616
+
+pub fn inside<F: Fn()>(c: F) {
+    c();
+}
+
+// Use different number of type parameters and closure type to trigger
+// an obvious ICE when param environments are mixed up
+pub fn outside<A,B>() {
+    inside(|| {});
+}
+
+fn main() {
+    outside::<(),()>();
+}