fix: fix builds without gatsby-config #8917 (#9256)

gatsbyjs · Oct 19, 2018 · 27fcc4d · 27fcc4d
1 parent 875b19c
commit 27fcc4d
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/packages/gatsby/src/bootstrap/index.js b/packages/gatsby/src/bootstrap/index.js
@@ -73,7 +73,7 @@ module.exports = async (args: BootstrapArgs) => {
   )
 
   // theme gatsby configs can be functions or objects
-  if (config.__experimentalThemes) {
+  if (config && config.__experimentalThemes) {
     const themesConfig = await Promise.mapSeries(
       config.__experimentalThemes,
       async ([themeName, themeConfig]) => {