From d8af9b3680de5340a1e8c5adb8c79d0a53fc5b41 Mon Sep 17 00:00:00 2001
From: Kohsuke Kawaguchi <kk@kohsuke.org>
Date: Tue, 22 Apr 2014 11:28:30 -0700
Subject: [PATCH] adding assertion

---
 core/src/main/java/jenkins/util/AtmostOneTaskExecutor.java | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/core/src/main/java/jenkins/util/AtmostOneTaskExecutor.java b/core/src/main/java/jenkins/util/AtmostOneTaskExecutor.java
index 9e6e82b33b..183f63931a 100644
--- a/core/src/main/java/jenkins/util/AtmostOneTaskExecutor.java
+++ b/core/src/main/java/jenkins/util/AtmostOneTaskExecutor.java
@@ -69,6 +69,10 @@ public class AtmostOneTaskExecutor<V> {
     }
 
     private synchronized void run() {
+        // the only situation where we can submit the task for execution
+        assert inprogress==null;
+        assert pending!=null;
+
         base.submit(new Callable<Void>() {
             @Override
             public Void call() throws Exception {
-- 
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