Update: Use pumpify to propagate errors/destroy

index.js

@@ -5,6 +5,7 @@ var Combine = require('ordered-read-streams');
 var unique = require('unique-stream');
 
 var glob = require('glob');
+var pumpify = require('pumpify');
 var resolveGlob = require('to-absolute-glob');
 var isNegatedGlob = require('is-negated-glob');
 var globParent = require('glob-parent');
@@ -124,13 +125,8 @@ var gs = {
     // Then just pipe them to a single unique stream and return it
     var aggregate = new Combine(streams);
     var uniqueStream = unique('path');
-    var returnStream = aggregate.pipe(uniqueStream);
 
-    aggregate.on('error', function(err) {
-      returnStream.emit('error', err);
-    });
-
-    return returnStream;
+    return pumpify.obj(aggregate, uniqueStream);
 
     function streamFromPositive(positive) {
       var negativeGlobs = negatives.filter(indexGreaterThan(positive.index))

package.json

@@ -26,6 +26,7 @@
     "glob-parent": "^3.0.0",
     "is-negated-glob": "^1.0.0",
     "ordered-read-streams": "^0.3.0",
+    "pumpify": "^1.3.5",
     "through2": "^0.6.0",
     "to-absolute-glob": "^0.1.1",
     "unique-stream": "^2.0.2"