Handle error in lookup of 'ob_base' (in case the memory can't be read)

diff --git a/Cython/Debugger/libpython.py b/Cython/Debugger/libpython.py
index c582e62cede10c5b508ef6963063efaece4b001d..45e1fde257d40851923ef1c609bb162b63f0dd9a 100644 (file)
--- a/Cython/Debugger/libpython.py
+++ b/Cython/Debugger/libpython.py
@@ -165,8 +165,11 @@ class PyObjectPtr(object):
                 return self._gdbval.dereference()[name]
             except RuntimeError:
                 # Python 3:
-                return self._gdbval.dereference()['ob_base'][name]
-
+                try:
+                    return self._gdbval.dereference()['ob_base'][name]
+                except RuntimeError:
+                    return 0
+                
         # General case: look it up inside the object:
         return self._gdbval.dereference()[name]