diff --git a/dev/lint/html-scripts.js b/dev/lint/html-scripts.js
index 5aef7599..ae518252 100644
--- a/dev/lint/html-scripts.js
+++ b/dev/lint/html-scripts.js
@@ -31,23 +31,28 @@ function lstatSyncSafe(fileName) {
}
}
+function validatePath(src, fileName, extDir) {
+ assert.ok(typeof src === 'string', `