assert: improve error check

Minor performance improvement. PR-URL: #17574 Reviewed-By: Anatoli Papirovski <[email protected]> Reviewed-By: Jon Moss <[email protected]> Reviewed-By: Tiancheng "Timothy" Gu <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Luigi Pinca <[email protected]>

Author: BridgeAR

lib/internal/errors.js

@@ -219,10 +219,14 @@ class AssertionError extends Error{
 red='\u001b[31m';
 }
 constutil=lazyUtil();
-if(actual&&actual.stack&&actualinstanceofError)
+if(typeofactual==='object'&&actual!==null&&
+'stack'inactual&&actualinstanceofError){
 actual=`${actual.name}: ${actual.message}`;
-if(expected&&expected.stack&&expectedinstanceofError)
+}
+if(typeofexpected==='object'&&expected!==null&&
+'stack'inexpected&&expectedinstanceofError){
 expected=`${expected.name}: ${expected.message}`;
+}
 
 if(errorDiff===0){
 letres=util.inspect(actual);