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-rw-r--r--tests/ui/parser/mut-patterns.rs4
1 files changed, 4 insertions, 0 deletions
diff --git a/tests/ui/parser/mut-patterns.rs b/tests/ui/parser/mut-patterns.rs
index b8610c4e190..45968a516e3 100644
--- a/tests/ui/parser/mut-patterns.rs
+++ b/tests/ui/parser/mut-patterns.rs
@@ -15,6 +15,10 @@ pub fn main() {
     //~^ ERROR `mut` on a binding may not be repeated
     //~| remove the additional `mut`s
 
+    let mut mut mut mut mut x = 0;
+    //~^ ERROR `mut` on a binding may not be repeated
+    //~| remove the additional `mut`s
+
     struct Foo { x: isize }
     let mut Foo { x: x } = Foo { x: 3 };
     //~^ ERROR `mut` must be attached to each individual binding