workaround quirks from Node.js (#5631)

test/ufuzz/job.js

@@ -20,9 +20,13 @@ switch (process.argv.length) {
 var tasks = [ run(), run() ];
 if (iterations) return;
 var alive = setInterval(function() {
-    actions.should_stop(stop);
+    actions.should_stop(function() {
+        clearInterval(alive);
+        tasks.forEach(function(kill) {
+            kill();
+        });
+    });
 }, 8 * 60 * 1000);
-var deadline = setTimeout(stop, (5 * 60 + 55) * 60 * 1000);
 
 function run() {
     var child, stdout, stderr, log;
@@ -72,11 +76,3 @@ function run() {
         }
     }
 }
-
-function stop() {
-    clearInterval(alive);
-    clearInterval(deadline);
-    tasks.forEach(function(kill) {
-        kill();
-    });
-}