diff -r 56cd8111b7f7 -r 41300fa6a67c src/script/api/qscriptengineagent.cpp
--- a/src/script/api/qscriptengineagent.cpp	Tue Jan 26 12:42:25 2010 +0200
+++ b/src/script/api/qscriptengineagent.cpp	Tue Feb 02 00:43:10 2010 +0200
@@ -6,35 +6,17 @@
 **
 ** This file is part of the QtScript module of the Qt Toolkit.
 **
-** $QT_BEGIN_LICENSE:LGPL$
-** No Commercial Usage
-** This file contains pre-release code and may not be distributed.
-** You may use this file in accordance with the terms and conditions
-** contained in the Technology Preview License Agreement accompanying
-** this package.
-**
+** $QT_BEGIN_LICENSE:LGPL-ONLY$
 ** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
+** This file may be used under the terms of the GNU Lesser
 ** General Public License version 2.1 as published by the Free Software
 ** Foundation and appearing in the file LICENSE.LGPL included in the
 ** packaging of this file.  Please review the following information to
 ** ensure the GNU Lesser General Public License version 2.1 requirements
 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
 **
-** In addition, as a special exception, Nokia gives you certain additional
-** rights.  These rights are described in the Nokia Qt LGPL Exception
-** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
-**
 ** If you have questions regarding the use of this file, please contact
 ** Nokia at qt-info@nokia.com.
-**
-**
-**
-**
-**
-**
-**
-**
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
@@ -172,7 +154,10 @@
 void QScriptEngineAgentPrivate::atStatement(const JSC::DebuggerCallFrame& frame, intptr_t sourceID, int lineno, int column)
 {
     QScript::UStringSourceProviderWithFeedback *source = engine->loadedScripts.value(sourceID);
-    Q_ASSERT(source != 0);
+    if (!source) {
+        // QTBUG-6108: We don't have the source for this script, so ignore.
+        return;
+    }
     column = source->columnNumberFromOffset(column);
     JSC::CallFrame *oldFrame = engine->currentFrame;
     int oldAgentLineNumber = engine->agentLineNumber;
@@ -201,7 +186,10 @@
 {
     if (q_ptr->supportsExtension(QScriptEngineAgent::DebuggerInvocationRequest)) {
         QScript::UStringSourceProviderWithFeedback *source = engine->loadedScripts.value(sourceID);
-        Q_ASSERT(source != 0);
+        if (!source) {
+            // QTBUG-6108: We don't have the source for this script, so ignore.
+            return;
+        }
         column = source->columnNumberFromOffset(column);
         JSC::CallFrame *oldFrame = engine->currentFrame;
         int oldAgentLineNumber = engine->agentLineNumber;