fixup! error serdes uses Symbol.toStringTag to recreate errors

This is a workaround for errors recreated by error serdes.

Author: BridgeAR

lib/internal/util/comparisons.js

@@ -270,7 +270,7 @@ function hasUnequalTag(val1, val2) {
 }
 
 function slowHasUnequalTag(val1Tag, val1, val2) {
-  if (val1[SymbolToStringTag]) {
+  if (val1[SymbolToStringTag] !== undefined && val2[SymbolToStringTag] !== undefined) {
     return val1[SymbolToStringTag] !== val2[SymbolToStringTag];
   }
   return val1Tag !== ObjectPrototypeToString(val2);