From 3d4e3c4dd901beb1c928b62648d301021866bd7b Mon Sep 17 00:00:00 2001
From: Stepan Koltsov <stepan.koltsov@jetbrains.com>
Date: Mon, 19 Mar 2012 14:57:01 +0400
Subject: [PATCH] better diagnostics

---
 .../jetbrains/jet/lang/types/lang/JetStandardLibrary.java  | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/types/lang/JetStandardLibrary.java b/compiler/frontend/src/org/jetbrains/jet/lang/types/lang/JetStandardLibrary.java
index d2ab90412da..92de70ba500 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/types/lang/JetStandardLibrary.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/types/lang/JetStandardLibrary.java
@@ -132,7 +132,12 @@ public class JetStandardLibrary {
         try {
             List<JetFile> files = new LinkedList<JetFile>();
             for(String fileName : libraryFiles) {
-                InputStream stream = JetStandardClasses.class.getClassLoader().getResourceAsStream("jet/" + fileName);
+                String path = "jet/" + fileName;
+                InputStream stream = JetStandardClasses.class.getClassLoader().getResourceAsStream(path);
+                
+                if (stream == null) {
+                    throw new IllegalStateException("resource not found in classpath: " + path);
+                }
 
                 //noinspection IOResourceOpenedButNotSafelyClosed
                 JetFile file = (JetFile) PsiFileFactory.getInstance(project).createFileFromText(fileName,