From 8cda01ca7a4cede10513b590ba993efe2fd98f13 Mon Sep 17 00:00:00 2001
From: Daniil Ovchinnikov <daniil.ovchinnikov@jetbrains.com>
Date: Wed, 26 Oct 2016 18:11:15 +0300
Subject: [PATCH] [grails] fix UnsupportedOperationException (IDEA-163162)

---
 .../src/org/jetbrains/plugins/groovy/mvc/MvcFramework.java     | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/plugins/groovy/src/org/jetbrains/plugins/groovy/mvc/MvcFramework.java b/plugins/groovy/src/org/jetbrains/plugins/groovy/mvc/MvcFramework.java
index 60d774a76f4c..0990ad551ad9 100644
--- a/plugins/groovy/src/org/jetbrains/plugins/groovy/mvc/MvcFramework.java
+++ b/plugins/groovy/src/org/jetbrains/plugins/groovy/mvc/MvcFramework.java
@@ -286,7 +286,8 @@ public abstract class MvcFramework {
   }
 
   public PathsList getApplicationClassPath(Module module) {
-    final List<VirtualFile> classPath = OrderEnumerator.orderEntries(module).recursively().withoutSdk().getPathsList().getVirtualFiles();
+    final List<VirtualFile> classPath = ContainerUtil.newArrayList();
+    classPath.addAll(OrderEnumerator.orderEntries(module).recursively().withoutSdk().getPathsList().getVirtualFiles());
 
     retainOnlyJarsAndDirectories(classPath);