1 files changed, 24 insertions, 0 deletions
diff --git a/tests/ui/borrowck/issue-45199.rs b/tests/ui/borrowck/issue-45199.rs
new file mode 100644
index 000000000..ded46e56e
--- /dev/null
+++ b/tests/ui/borrowck/issue-45199.rs
@@ -0,0 +1,24 @@
+fn test_drop_replace() {
+    let b: Box<isize>;
+    //~^ HELP consider making this binding mutable
+    //~| SUGGESTION mut b
+    b = Box::new(1);    //~ NOTE first assignment
+    b = Box::new(2);    //~ ERROR cannot assign twice to immutable variable `b`
+                        //~| NOTE cannot assign twice to immutable
+}
+
+fn test_call() {
+    let b = Box::new(1);    //~ NOTE first assignment
+                            //~| HELP consider making this binding mutable
+                            //~| SUGGESTION mut b
+    b = Box::new(2);        //~ ERROR cannot assign twice to immutable variable `b`
+                            //~| NOTE cannot assign twice to immutable
+}
+
+fn test_args(b: Box<i32>) {  //~ HELP consider making this binding mutable
+                                //~| SUGGESTION mut b
+    b = Box::new(2);            //~ ERROR cannot assign to immutable argument `b`
+                                //~| NOTE cannot assign to immutable argument
+}
+
+fn main() {}