Isolate exceptions when evaluating javascript code from C++....

webkit/port/bindings/v8/v8_proxy.cpp

 // Copyright (c) 2008, Google Inc.
 // All rights reserved.
 // 
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 // 
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
@@ skipping 1354 matching lines @@
     // Compile the script.
     v8::Local<v8::String> code = v8ExternalString(str);
     ChromiumBridge::traceEventBegin("v8.compile", n, "");
     v8::Handle<v8::Script> script = CompileScript(code, fileName, baseLine);
     ChromiumBridge::traceEventEnd("v8.compile", n, "");
 
     // Set inlineCode to true for <a href="javascript:doSomething()">
     // and false for <script>doSomething</script>. For some reason, fileName
     // gives us this information.
     ChromiumBridge::traceEventBegin("v8.run", n, "");
-    v8::Local<v8::Value> result = RunScript(script, fileName.isNull());
+    v8::Local<v8::Value> result;
+    {
+      // Isolate exceptions that occur when executing the code.  These
+      // exceptions should not interfere with javascript code we might
+      // evaluate from C++ when returning from here
+      v8::TryCatch try_catch;
+      try_catch.SetVerbose(true);
+      result = RunScript(script, fileName.isNull());
+    }
     ChromiumBridge::traceEventEnd("v8.run", n, "");
     return result;
 }
 
 v8::Local<v8::Value> V8Proxy::RunScript(v8::Handle<v8::Script> script,
                                         bool inline_code)
 {
   if (script.IsEmpty())
     return v8::Local<v8::Value>();
 
@@ skipping 2144 matching lines @@
     }
     return ToWebCoreString(v8::Debug::Call(frame_source_name));
 }
 
 void V8Proxy::RegisterExtension(v8::Extension* extension) {
     v8::RegisterExtension(extension);
     m_extensions.push_back(extension);
 }
 
 }  // namespace WebCore