Add test for rust-lang#34721

Author: estebank

src/test/ui/issues/issue-34721.rs

@@ -0,0 +1,34 @@
+#![feature(nll)]
+
+pub trait Foo {
+    fn zero(self) -> Self;
+}
+
+impl Foo for u32 {
+    fn zero(self) -> u32 { 0u32 }
+}
+
+pub mod bar {
+    pub use Foo;
+    pub fn bar<T: Foo>(x: T) -> T {
+      x.zero()
+    }
+}
+
+mod baz {
+    use bar;
+    use Foo;
+    pub fn baz<T: Foo>(x: T) -> T {
+        if 0 == 1 {
+            bar::bar(x.zero())
+        } else {
+            x.zero()
+        };
+        x.zero()
+        //~^ ERROR use of moved value
+    }
+}
+
+fn main() {
+    let _ = baz::baz(0u32);
+}

src/test/ui/issues/issue-34721.stderr

@@ -0,0 +1,18 @@
+error[E0382]: use of moved value: `x`
+  --> $DIR/issue-34721.rs:27:9
+   |
+LL |     pub fn baz<T: Foo>(x: T) -> T {
+   |                        - move occurs because `x` has type `T`, which does not implement the `Copy` trait
+LL |         if 0 == 1 {
+LL |             bar::bar(x.zero())
+   |                      - value moved here
+LL |         } else {
+LL |             x.zero()
+   |             - value moved here
+LL |         };
+LL |         x.zero()
+   |         ^ value used here after move
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0382`.