Move /src/test to /tests

tests/ui/for-loop-while/while-prelude-drop.rs

@@ -0,0 +1,24 @@
+// run-pass
+#![allow(non_camel_case_types)]
+
+use std::string::String;
+
+#[derive(PartialEq)]
+enum t { a, b(String), }
+
+fn make(i: isize) -> t {
+    if i > 10 { return t::a; }
+    let mut s = String::from("hello");
+    // Ensure s is non-const.
+
+    s.push_str("there");
+    return t::b(s);
+}
+
+pub fn main() {
+    let mut i = 0;
+
+
+    // The auto slot for the result of make(i) should not leak.
+    while make(i) != t::a { i += 1; }
+}