Add run-fail test for #2061

Author: catamorphism

src/test/run-fail/issue-2061.rs

@@ -0,0 +1,11 @@
+// error-pattern: ran out of stack
+struct R {
+    b: int,
+    drop {
+        let _y = R { b: self.b };
+    }
+}
+
+fn main() {
+    let _x = R { b: 0 };
+}