1 files changed, 2 insertions, 0 deletions
diff --git a/Source/WebCore/inspector/front-end/DebuggerPresentationModel.js b/Source/WebCore/inspector/front-end/DebuggerPresentationModel.js
index 8d83b137a..27b045758 100644
--- a/Source/WebCore/inspector/front-end/DebuggerPresentationModel.js
+++ b/Source/WebCore/inspector/front-end/DebuggerPresentationModel.js
@@ -183,6 +183,8 @@ WebInspector.DebuggerPresentationModel.prototype = {
     {
         var result = [];
         for (var i = 0; i < this._rawSourceCodes.length; ++i) {
+            if (!this._rawSourceCodes[i].sourceMapping)
+                continue;
             var uiSourceCodeList = this._rawSourceCodes[i].sourceMapping.uiSourceCodeList();
             for (var j = 0; j < uiSourceCodeList.length; ++j)
                 result.push(uiSourceCodeList[j]);