Add tests for #2190 (xfailed)

Author: catamorphism

src/test/run-pass/issue-2190-1.rs

@@ -0,0 +1,14 @@
+// xfail-test
+const generations: uint = 1024+256+128+49;
+
+fn child_no(x: uint) -> fn~() {
+     || {
+        if x < generations {
+            task::spawn(child_no(x+1));
+        }
+    }
+}
+
+fn main() {
+    task::spawn(child_no(0));
+}

src/test/run-pass/issue-2190-2.rs

@@ -0,0 +1,21 @@
+// xfail-test
+mod a {
+fn foo(f: fn&()) { f() }
+fn bar() {}
+fn main() { foo(||bar()); }
+}
+
+mod b {
+fn foo(f: Option<fn&()>) { f.iter(|x|x()) }
+fn bar() {}
+fn main() { foo(Some(bar)); }
+}
+
+mod c {
+fn foo(f: Option<fn&()>) { f.iter(|x|x()) }
+fn bar() {}
+fn main() { foo(Some(||bar())); }
+}
+
+fn main() {
+}

src/test/run-pass/issue-2190.rs

@@ -0,0 +1,8 @@
+// xfail-test
+type t = {
+    f: fn~()
+};
+
+fn main() {
+    let _t: t = { f: {||()} };
+}