1 files changed, 3 insertions, 3 deletions
diff --git a/compiler/rustc_lexer/src/unescape.rs b/compiler/rustc_lexer/src/unescape.rs
index 8507ca9d8..bb4d91247 100644
--- a/compiler/rustc_lexer/src/unescape.rs
+++ b/compiler/rustc_lexer/src/unescape.rs
@@ -298,10 +298,10 @@ where
         }
         let tail = &tail[first_non_space..];
         if let Some(c) = tail.chars().nth(0) {
-            // For error reporting, we would like the span to contain the character that was not
-            // skipped. The +1 is necessary to account for the leading \ that started the escape.
-            let end = start + first_non_space + c.len_utf8() + 1;
             if c.is_whitespace() {
+                // For error reporting, we would like the span to contain the character that was not
+                // skipped. The +1 is necessary to account for the leading \ that started the escape.
+                let end = start + first_non_space + c.len_utf8() + 1;
                 callback(start..end, Err(EscapeError::UnskippedWhitespaceWarning));
             }
         }