From 9c2b2173ceecf178734da863751d213ffe5e494c Mon Sep 17 00:00:00 2001
From: ducky
Date: Tue, 15 Dec 2015 14:01:53 -0800
Subject: Meaningful error when resource copy fails

---
 src/main/scala/Chisel/testers/TesterDriver.scala | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'src/main')

diff --git a/src/main/scala/Chisel/testers/TesterDriver.scala b/src/main/scala/Chisel/testers/TesterDriver.scala
index 4da5d059..b25b160b 100644
--- a/src/main/scala/Chisel/testers/TesterDriver.scala
+++ b/src/main/scala/Chisel/testers/TesterDriver.scala
@@ -11,13 +11,16 @@ object TesterDriver extends BackendCompilationUtilities {
     */
   def copyResourceToFile(name: String, file: File) {
     val in = getClass().getResourceAsStream(name)
+    if (in == null) {
+      throw new FileNotFoundException(s"Resource '$name'")
+    }
     val out = new FileOutputStream(file)
     Iterator.continually(in.read).takeWhile(-1 !=).foreach(out.write)
     out.close()
   }
 
   /** For use with modules that should successfully be elaborated by the
-    * frontend, and which can be turned into executeables with assertions. */
+    * frontend, and which can be turned into executables with assertions. */
   def execute(t: () => BasicTester, additionalVResources: Seq[String] = Seq()): Boolean = {
     // Invoke the chisel compiler to get the circuit's IR
     val circuit = Driver.elaborate(t)
-- 
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