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diff --git a/tests/ui/async-await/no-non-guaranteed-initialization.stderr b/tests/ui/async-await/no-non-guaranteed-initialization.stderr
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+error[E0381]: used binding `y` is possibly-uninitialized
+ --> $DIR/no-non-guaranteed-initialization.rs:9:5
+ |
+LL | let y;
+ | - binding declared here but left uninitialized
+LL | if x > 5 {
+ | ----- if this `if` condition is `false`, `y` is not initialized
+LL | y = echo(10).await;
+LL | }
+ | - an `else` arm might be missing here, initializing `y`
+LL | y
+ | ^ `y` used here but it is possibly-uninitialized
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0381`.