Do not reuse $line outside of foreach

system/Debug/Toolbar/Collectors/Database.php

@@ -134,6 +134,8 @@ public function display(): array
  $data['queries'] = array_map(static function (array $query) {
  $isDuplicate = $query['duplicate'] === true;
 
+ $firstNonSystemLine = '';
+
  foreach ($query['trace'] as $index => &$line) {
  // simplify file and line
  if (isset($line['file'])) {
@@ -143,6 +145,11 @@ public function display(): array
  $line['file'] = '[internal function]';
  }
 
+ // find the first trace line that does not originate from `system/`
+ if ($firstNonSystemLine === '' && strpos($line['file'], 'SYSTEMPATH') === false) {
+ $firstNonSystemLine = $line['file'];
+ }
+
  // simplify function call
  if (isset($line['class'])) {
  $line['function'] = $line['class'] . $line['type'] . $line['function'];
@@ -162,20 +169,6 @@ public function display(): array
  $line['index'] = $indexPadded . str_repeat(chr(0xC2) . chr(0xA0), 4);
  }
 
- // remove the caller trace which is duplicated as the last item
- array_pop($query['trace']);
-
- // Find the first line that doesn't include `system` in the backtrace
- $firstNonSystemLine = '';
-
- foreach ($query['trace'] as $line) {
- if (strpos($line['file'], 'SYSTEMPATH') === false) {
- $firstNonSystemLine = $line['file'];
-
- break;
- }
- }
-
  return [
  'hover' => $isDuplicate ? 'This query was called more than once.' : '',
  'class' => $isDuplicate ? 'duplicate' : '',