Change recursive error printing to just replace recursively

src/messages.js

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1015 matching lines @@
       return this.name + ": " + formatted;
     }
     var message = this.hasOwnProperty("message") ? (": " + this.message) : "";
     return this.name + message;
   } finally {
     visited_errors.pop();
   }
 }
 
 function errorToString() {
-  // These helper functions are needed because access to properties on
+  // This helper function is needed because access to properties on
   // the builtins object do not work inside of a catch clause.
   function isCyclicErrorMarker(o) { return o === cyclic_error_marker; }
-  function isVisitedErrorsEmpty() { return visited_errors.length === 0; }
 
   try {
     return %_CallFunction(this, errorToStringDetectCycle);
   } catch(e) {
-    // Propagate cyclic_error_marker exception until all error
-    // formatting is finished and then return the empty string. Safari
-    // and Firefox also returns the empty string when converting a
-    // cyclic error to a string.
-    if (isCyclicErrorMarker(e) && isVisitedErrorsEmpty()) return '';
+    // If this error message was encountered already return the empty
+    // string for it instead of recursively formatting it.
+    if (isCyclicErrorMarker(e)) return '';
     else throw e;
   }
 }
 
 %FunctionSetName(errorToString, 'toString');
 %SetProperty($Error.prototype, 'toString', errorToString, DONT_ENUM);
 
 // Boilerplate for exceptions for stack overflows. Used from
 // Top::StackOverflow().
 const kStackOverflowBoilerplate = MakeRangeError('stack_overflow', []);