pepper in some setImmediate for good measure. re #108

Author: ctalkington

lib/core.js

@@ -108,14 +108,14 @@ Archiver.prototype._moduleAppend = function(source, data, callback) {
 
     if (err) {
       this.emit('error', err);
-      callback();
+      setImmediate(callback);
       return;
     }
 
     this.emit('entry', data);
     this._entries.push(data);
 
-    callback();
+    setImmediate(callback);
   }.bind(this));
 };
 
@@ -226,24 +226,24 @@ Archiver.prototype._onStatQueueTask = function(task, callback) {
 
   fs.stat(task.filepath, function(err, stats) {
     if (this._state.aborted) {
-      callback();
+      setImmediate(callback);
       return;
     }
 
     if (err) {
       this.emit('error', err);
-      callback();
+      setImmediate(callback);
       return;
     }
 
     task = this._updateQueueTaskWithStats(task, stats);
 
     if (task.source !== null) {
       this._queue.push(task);
-      callback();
+      setImmediate(callback);
     } else {
       this.emit('error', new Error('unsupported entry: ' + task.filepath));
-      callback();
+      setImmediate(callback);
       return;
     }
   }.bind(this));