Add new test for closure in closure parsing

This new test highlight the fix of #2656.

gcc/testsuite/ChangeLog:

	* rust/compile/closure_in_closure.rs: New test.

Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/gcc/testsuite/rust/compile/closure_in_closure.rs b/gcc/testsuite/rust/compile/closure_in_closure.rs
new file mode 100644
index 0000000..1a00307
--- /dev/null
+++ b/gcc/testsuite/rust/compile/closure_in_closure.rs
@@ -0,0 +1,8 @@
+// { dg-additional-options "-frust-compile-until=ast" }
+//
+// Do not reformat this test! The default rust format settings will insert a
+// space between closure parameter lists.
+fn main() {
+    let f = |_||x, y| x+y;
+    assert_eq!(f(())(1, 2), 3);
+}