#1565525: Add traceback.clear_frames() helper function to clear locals ref'd by a traceback
diff --git a/Lib/traceback.py b/Lib/traceback.py
index 3aa1578..d5b3752 100644
--- a/Lib/traceback.py
+++ b/Lib/traceback.py
@@ -7,7 +7,8 @@
__all__ = ['extract_stack', 'extract_tb', 'format_exception',
'format_exception_only', 'format_list', 'format_stack',
'format_tb', 'print_exc', 'format_exc', 'print_exception',
- 'print_last', 'print_stack', 'print_tb']
+ 'print_last', 'print_stack', 'print_tb',
+ 'clear_frames']
#
# Formatting and printing lists of traceback lines.
@@ -299,3 +300,13 @@
stack = list(_extract_stack_iter(_get_stack(f), limit=limit))
stack.reverse()
return stack
+
+def clear_frames(tb):
+ "Clear all references to local variables in the frames of a traceback."
+ while tb is not None:
+ try:
+ tb.tb_frame.clear()
+ except RuntimeError:
+ # Ignore the exception raised if the frame is still executing.
+ pass
+ tb = tb.tb_next