Fixed 'cy bt' bug where backtraces wouldn't be printed if the name of a...

Fixed 'cy bt' bug where backtraces wouldn't be printed if the name of a function couldn't be looked up for some stack frame

Cython/Debugger/libcython.py

@@ -907,11 +907,14 @@ class CyBacktrace(CythonCommand):
         while frame:
             is_c = False
             
-            if print_all or self.is_relevant_function(frame):
+            is_relevant = False
             try:
+                is_relevant = self.is_relevant_function(frame)
+            except CyGDBError:
+                pass
+                
+            if print_all or is_relevant:
                 self.print_stackframe(frame, index)
-                except gdb.GdbError:
-                    print 'Unable to fsdk.fjkds'
             
             index += 1
             frame = frame.newer()