guard walk() against not having a cb

k-matsuzaki · k-matsuzaki · commit c4b3527b7391 · 2015-10-16T13:15:17.000+09:00
diff --git a/index.js b/index.js
@@ -324,7 +324,7 @@ Deps.prototype.walk = function (id, parent, cb) {
         if (opts.postFilter && !opts.postFilter(id, file, pkg)) {
             if (--self.pending === 0) self.push(null);
             if (input) --self.inputPending;
-            return cb(null, undefined);
+            return cb && cb(null, undefined);
         }
         if (err && rec.source) {
             file = rec.file;

Original file line number	Diff line number	Diff line change
`@@ -324,7 +324,7 @@ Deps.prototype.walk = function (id, parent, cb) {`
`324`	`324`	`if (opts.postFilter && !opts.postFilter(id, file, pkg)) {`
`325`	`325`	`if (--self.pending === 0) self.push(null);`
`326`	`326`	`if (input) --self.inputPending;`
`327`		`- return cb(null, undefined);`
	`327`	`+ return cb && cb(null, undefined);`
`328`	`328`	`}`
`329`	`329`	`if (err && rec.source) {`
`330`	`330`	`file = rec.file;`