diff --git a/src/librustc_resolve/late.rs b/src/librustc_resolve/late.rs
index 3b49b3b6ff7..2e37f666b39 100644
--- a/src/librustc_resolve/late.rs
+++ b/src/librustc_resolve/late.rs
@@ -1323,7 +1323,8 @@ impl<'a, 'b, 'ast> LateResolutionVisitor<'a, 'b, 'ast> {
 
         // 3) Report all missing variables we found.
         let mut missing_vars = missing_vars.iter_mut().collect::<Vec<_>>();
-        missing_vars.sort();
+        missing_vars.sort_by_key(|(sym, _err)| sym.as_str());
+
         for (name, mut v) in missing_vars {
             if inconsistent_vars.contains_key(name) {
                 v.could_be_path = false;
diff --git a/src/test/ui/or-patterns/mismatched-bindings-async-fn.stderr b/src/test/ui/or-patterns/mismatched-bindings-async-fn.stderr
index b9c74266411..998577cf4b5 100644
--- a/src/test/ui/or-patterns/mismatched-bindings-async-fn.stderr
+++ b/src/test/ui/or-patterns/mismatched-bindings-async-fn.stderr
@@ -1,11 +1,3 @@
-error[E0408]: variable `x` is not bound in all patterns
-  --> $DIR/mismatched-bindings-async-fn.rs:6:17
-   |
-LL | async fn a((x | s): String) {}
-   |             -   ^ pattern doesn't bind `x`
-   |             |
-   |             variable not in all patterns
-
 error[E0408]: variable `s` is not bound in all patterns
   --> $DIR/mismatched-bindings-async-fn.rs:6:13
    |
@@ -15,12 +7,12 @@ LL | async fn a((x | s): String) {}
    |             pattern doesn't bind `s`
 
 error[E0408]: variable `x` is not bound in all patterns
-  --> $DIR/mismatched-bindings-async-fn.rs:11:13
+  --> $DIR/mismatched-bindings-async-fn.rs:6:17
    |
-LL |     let x | s = String::new();
-   |         -   ^ pattern doesn't bind `x`
-   |         |
-   |         variable not in all patterns
+LL | async fn a((x | s): String) {}
+   |             -   ^ pattern doesn't bind `x`
+   |             |
+   |             variable not in all patterns
 
 error[E0408]: variable `s` is not bound in all patterns
   --> $DIR/mismatched-bindings-async-fn.rs:11:9
@@ -30,6 +22,14 @@ LL |     let x | s = String::new();
    |         |
    |         pattern doesn't bind `s`
 
+error[E0408]: variable `x` is not bound in all patterns
+  --> $DIR/mismatched-bindings-async-fn.rs:11:13
+   |
+LL |     let x | s = String::new();
+   |         -   ^ pattern doesn't bind `x`
+   |         |
+   |         variable not in all patterns
+
 error: aborting due to 4 previous errors
 
 For more information about this error, try `rustc --explain E0408`.
diff --git a/src/test/ui/span/issue-39698.stderr b/src/test/ui/span/issue-39698.stderr
index 7fa5d24c41b..445df90d395 100644
--- a/src/test/ui/span/issue-39698.stderr
+++ b/src/test/ui/span/issue-39698.stderr
@@ -8,16 +8,6 @@ LL |         T::T1(a, d) | T::T2(d, b) | T::T3(c) | T::T4(a) => { println!("{:?}
    |               |       pattern doesn't bind `a`
    |               variable not in all patterns
 
-error[E0408]: variable `d` is not bound in all patterns
-  --> $DIR/issue-39698.rs:10:37
-   |
-LL |         T::T1(a, d) | T::T2(d, b) | T::T3(c) | T::T4(a) => { println!("{:?}", a); }
-   |                  -          -       ^^^^^^^^   ^^^^^^^^ pattern doesn't bind `d`
-   |                  |          |       |
-   |                  |          |       pattern doesn't bind `d`
-   |                  |          variable not in all patterns
-   |                  variable not in all patterns
-
 error[E0408]: variable `b` is not bound in all patterns
   --> $DIR/issue-39698.rs:10:9
    |
@@ -38,6 +28,16 @@ LL |         T::T1(a, d) | T::T2(d, b) | T::T3(c) | T::T4(a) => { println!("{:?}
    |         |             pattern doesn't bind `c`
    |         pattern doesn't bind `c`
 
+error[E0408]: variable `d` is not bound in all patterns
+  --> $DIR/issue-39698.rs:10:37
+   |
+LL |         T::T1(a, d) | T::T2(d, b) | T::T3(c) | T::T4(a) => { println!("{:?}", a); }
+   |                  -          -       ^^^^^^^^   ^^^^^^^^ pattern doesn't bind `d`
+   |                  |          |       |
+   |                  |          |       pattern doesn't bind `d`
+   |                  |          variable not in all patterns
+   |                  variable not in all patterns
+
 error: aborting due to 4 previous errors
 
 For more information about this error, try `rustc --explain E0408`.