Potential patch for Issues like #3013 and #3017

lib/core/decorators.py

@@ -7,6 +7,8 @@ See the file 'LICENSE' for copying permission
 
 import hashlib
 
+from lib.core.threads import getCurrentThreadData
+
 def cachedmethod(f, cache={}):
     """
     Method with a cached content
@@ -22,3 +24,18 @@ def cachedmethod(f, cache={}):
         return cache[key]
 
     return _
+
+def stackedmethod(f):
+    def _(*args, **kwargs):
+        threadData = getCurrentThreadData()
+        originalLevel = len(threadData.valueStack)
+
+        try:
+            result = f(*args, **kwargs)
+        finally:
+            if len(threadData.valueStack) > originalLevel:
+                threadData.valueStack = threadData.valueStack[:originalLevel]
+
+        return result
+
+    return _