2 files changed, 17 insertions, 0 deletions
diff --git a/src/test/ui/typeck/issue-93486.rs b/src/test/ui/typeck/issue-93486.rs
new file mode 100644
index 00000000000..f8f98d5c1c7
--- /dev/null
+++ b/src/test/ui/typeck/issue-93486.rs
@@ -0,0 +1,6 @@
+fn main() {
+    while let 1 = 1 {
+        vec![].last_mut().unwrap() = 3_u8;
+        //~^ ERROR invalid left-hand side of assignment
+    }
+}
diff --git a/src/test/ui/typeck/issue-93486.stderr b/src/test/ui/typeck/issue-93486.stderr
new file mode 100644
index 00000000000..70b5b63f1cb
--- /dev/null
+++ b/src/test/ui/typeck/issue-93486.stderr
@@ -0,0 +1,11 @@
+error[E0070]: invalid left-hand side of assignment
+  --> $DIR/issue-93486.rs:3:36
+   |
+LL |         vec![].last_mut().unwrap() = 3_u8;
+   |         -------------------------- ^
+   |         |
+   |         cannot assign to this expression
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0070`.