1 files changed, 25 insertions, 0 deletions
diff --git a/src/test/ui/generator/yield-while-iterating.stderr b/src/test/ui/generator/yield-while-iterating.stderr
new file mode 100644
index 000000000..b65634752
--- /dev/null
+++ b/src/test/ui/generator/yield-while-iterating.stderr
@@ -0,0 +1,25 @@
+error[E0626]: borrow may still be in use when generator yields
+  --> $DIR/yield-while-iterating.rs:13:18
+   |
+LL |         for p in &x {
+   |                  ^^
+LL |             yield();
+   |             ------- possible yield occurs here
+
+error[E0502]: cannot borrow `x` as immutable because it is also borrowed as mutable
+  --> $DIR/yield-while-iterating.rs:58:20
+   |
+LL |     let mut b = || {
+   |                 -- mutable borrow occurs here
+LL |         for p in &mut x {
+   |                       - first borrow occurs due to use of `x` in generator
+...
+LL |     println!("{}", x[0]);
+   |                    ^ immutable borrow occurs here
+LL |     Pin::new(&mut b).resume(());
+   |              ------ mutable borrow later used here
+
+error: aborting due to 2 previous errors
+
+Some errors have detailed explanations: E0502, E0626.
+For more information about an error, try `rustc --explain E0502`.