abort failing 'pending tests'

lib/runner.js

@@ -791,9 +791,15 @@ Runner.prototype.runSuite = function(suite, fn) {
  * @private
  */
 Runner.prototype.uncaught = function(err) {
+  // ignore async 'this.skip()' exception
   if (err instanceof Pending) {
     return;
   }
+  // allow uncaught exceptions to propagate
+  if (this.allowUncaught) {
+    throw err;
+  }
+
   if (err) {
     debug('uncaught exception %O', err);
   } else {
@@ -829,11 +835,18 @@ Runner.prototype.uncaught = function(err) {
 
   runnable.clearTimeout();
 
-  // Ignore errors if already failed or pending
-  // See #3226
-  if (runnable.isFailed() || runnable.isPending()) {
+  if (runnable.isFailed()) {
+    // Ignore error if already failed
+    return;
+  } else if (runnable.isPending()) {
+    // we can't recover from a failing 'pending test'
+    runnable.isPending = alwaysFalse;
+    this.fail(runnable, err);
+    delete runnable.isPending;
+    this.abort();
     return;
   }
+
   // we cannot recover gracefully if a Runnable has already passed
   // then fails asynchronously
   var alreadyPassed = runnable.isPassed();