Testcase (XFAILed) for fn item given as lval.

src/Makefile

@@ -319,6 +319,7 @@ TEST_XFAILS_X86 :=  test/run-pass/mlist-cycle.rs \
                     test/run-pass/obj-as.rs \
                     test/run-pass/rec-auto.rs \
                     test/run-pass/vec-slice.rs \
+                    test/run-pass/fn-lval.rs \
                     test/run-pass/generic-fn-infer.rs \
                     test/run-pass/generic-recursive-tag.rs \
                     test/run-pass/mutable-alias-vec.rs \
@@ -355,6 +356,7 @@ TEST_XFAILS_LLVM := $(addprefix test/run-pass/, \
                       else-if.rs \
                       export-non-interference.rs \
                       exterior.rs \
+                      fn-lval.rs \
                       foreach-put-structured.rs \
                       foreach-simple-outer-slot.rs \
                       foreach-simple.rs \

src/test/run-pass/fn-lval.rs

@@ -0,0 +1,8 @@
+// -*- rust -*-
+
+fn foo((fn(int) -> int) f) {}
+fn id(int x) -> int { ret x; }
+
+fn main() {
+  foo(id);
+}