Attempt to improve performance.

Author: peter17

src/Analyser/NodeScopeResolver.php

@@ -2288,6 +2288,11 @@ public function processStmtNode(
 
 				// emit error
 				foreach ($matchingCatchTypes as $catchTypeIndex => $matched) {
+					// Matched (non-dead) catches only need to be reported to the rule
+					// when in a trait, to detect disagreement between the classes using it.
+					if ($matched && !$scope->isInTrait()) {
+						continue;
+					}
 					$this->callNodeCallback($nodeCallback, new CatchWithUnthrownExceptionNode($catchNode, $catchTypes[$catchTypeIndex], $originalCatchTypes[$catchTypeIndex], $matched), $scope, $storage);
 				}