Move /src/test to /tests

tests/ui/object-lifetime/object-lifetime-default-from-box-error.rs

@@ -0,0 +1,37 @@
+// Test various cases where the defaults should lead to errors being
+// reported.
+
+#![allow(dead_code)]
+
+trait SomeTrait {
+    fn dummy(&self) { }
+}
+
+struct SomeStruct<'a> {
+    r: Box<dyn SomeTrait+'a>
+}
+
+fn load(ss: &mut SomeStruct) -> Box<dyn SomeTrait> {
+    // `Box<SomeTrait>` defaults to a `'static` bound, so this return
+    // is illegal.
+
+    ss.r
+    //~^ ERROR lifetime may not live long enough
+    //~| ERROR cannot move out of
+}
+
+fn store(ss: &mut SomeStruct, b: Box<dyn SomeTrait>) {
+    // No error: b is bounded by 'static which outlives the
+    // (anonymous) lifetime on the struct.
+
+    ss.r = b;
+}
+
+fn store1<'b>(ss: &mut SomeStruct, b: Box<dyn SomeTrait+'b>) {
+    // Here we override the lifetimes explicitly, and so naturally we get an error.
+
+    ss.r = b; //~ ERROR explicit lifetime required in the type of `ss` [E0621]
+}
+
+fn main() {
+}