polymer-cli-issue-701.patch

--- node_modules/polymer-cli/lib/build/optimize-streams.js.orig	2017-10-10 00:13:37.391996062 +0900
+++ node_modules/polymer-cli/lib/build/optimize-streams.js	2017-10-10 00:13:47.206996049 +0900
@@ -49,6 +49,12 @@
             callback(null, file);
             return;
         }
+        if(/firebase\/firebase-auth\.js$/.test(file.path) &&
+            this.optimizerOptions.presets[0].minified == true){
+            logger.warn(`skip minify ${file.path} ...`);
+            callback(null, file);
+            return;
+        }
         if (file.contents) {
             try {
                 let contents = file.contents.toString();