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-rw-r--r--compiler/rustc_builtin_macros/src/format.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/rustc_builtin_macros/src/format.rs b/compiler/rustc_builtin_macros/src/format.rs
index d70888205a5..bffc0407e81 100644
--- a/compiler/rustc_builtin_macros/src/format.rs
+++ b/compiler/rustc_builtin_macros/src/format.rs
@@ -768,7 +768,7 @@ fn report_missing_placeholders(
 
     if !found_foreign && invalid_refs.is_empty() {
         // Show example if user didn't use any format specifiers
-        let show_example = used.iter().all(|used| !used);
+        let show_example = !used.contains(&true);
 
         if !show_example {
             if unused.len() > 1 {