add recursion guard for GC marking

To achieve behavior of the old back-end. There, the recursion guard
was automatic because a mark flag was set on the object as soon as
marking begun, but in JSC it appears to only be set _after_ the
marking is completed.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/script/bridge/qscriptobject_p.h b/src/script/bridge/qscriptobject_p.h
index a905234..d499c61 100644
--- a/src/script/bridge/qscriptobject_p.h
+++ b/src/script/bridge/qscriptobject_p.h
@@ -69,8 +69,9 @@ public:
     {
         JSC::JSValue data; // QScriptValue::data
         QScriptObjectDelegate *delegate;
+        bool isMarking; // recursion guard
 
-        Data() : delegate(0) {}
+        Data() : delegate(0), isMarking(false) {}
         ~Data();
     };