Check that function being patched has no activations on any thread stack

src/liveedit.cc

Index: src/liveedit.cc
diff --git a/src/liveedit.cc b/src/liveedit.cc
index 2c27e9f0dd7c9d81fb31b94a1bfea936aa57c071..513cc0233f18de5464080317b4a80027d1c6bdbd 100644
--- a/src/liveedit.cc
+++ b/src/liveedit.cc
@@ -320,9 +320,9 @@ JSArray* LiveEdit::GatherCompileInfo(Handle<Script> script,
   CompilationZoneScope zone_scope(DELETE_ON_EXIT);
 
   FunctionInfoListener listener;
+  Handle<Object> original_source = Handle<Object>(script->source());
   script->set_source(*source);
   active_function_info_listener = &listener;
-  Handle<Object> original_source = Handle<Object>(script->source());
   CompileScriptForTracker(script);
   active_function_info_listener = NULL;
   script->set_source(*original_source);