diff --git a/src/lib.rs b/src/lib.rs
index 35448a087a349..c3bf8efb64e73 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -516,7 +516,6 @@ fn format_lines(
     config: &Config,
     report: &FormatReport,
 ) {
-    let mut trims = vec![];
     let mut last_was_space = false;
     let mut line_len = 0;
     let mut cur_line = 1;
@@ -565,8 +564,15 @@ fn format_lines(
                 // Check for (and record) trailing whitespace.
                 if last_was_space {
                     if should_report_error(config, kind, is_string, &ErrorKind::TrailingWhitespace)
+                        && !is_skipped_line(cur_line, skipped_range)
                     {
-                        trims.push((cur_line, kind, line_buffer.clone()));
+                        errors.push(FormattingError {
+                            line: cur_line,
+                            kind: ErrorKind::TrailingWhitespace,
+                            is_comment: kind.is_comment(),
+                            is_string: kind.is_string(),
+                            line_buffer: line_buffer.clone(),
+                        });
                     }
                     line_len -= 1;
                 }
@@ -611,18 +617,6 @@ fn format_lines(
         text.truncate(line);
     }
 
-    for &(l, kind, ref b) in &trims {
-        if !is_skipped_line(l, skipped_range) {
-            errors.push(FormattingError {
-                line: l,
-                kind: ErrorKind::TrailingWhitespace,
-                is_comment: kind.is_comment(),
-                is_string: kind.is_string(),
-                line_buffer: b.clone(),
-            });
-        }
-    }
-
     report.append(name.clone(), errors);
 }