Check for nil environment before accessing it (#453)

bundle/config/root.go

@@ -78,6 +78,9 @@ func (r *Root) SetConfigFilePath(path string) {
 	r.Resources.SetConfigFilePath(path)
 	if r.Environments != nil {
 		for _, env := range r.Environments {
+			if env == nil {
+				continue
+			}
 			if env.Resources != nil {
 				env.Resources.SetConfigFilePath(path)
 			}

bundle/tests/environment_empty/bundle.yml

@@ -0,0 +1,5 @@
+bundle:
+  name: environment_empty
+
+environments:
+  development:

bundle/tests/environment_empty_test.go

@@ -0,0 +1,12 @@
+package config_tests
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestEnvironmentEmpty(t *testing.T) {
+	b := loadEnvironment(t, "./environment_empty", "development")
+	assert.Equal(t, "development", b.Config.Bundle.Environment)
+}