Show the traceback line numbers as well as the current line numbers if an exception is being debugged. Courtesy of pdb++ by Antonio Cuni. Also document -> and >> markers for "list".
diff --git a/Lib/test/test_pdb.py b/Lib/test/test_pdb.py
index 0861e1e..6010bf3 100644
--- a/Lib/test/test_pdb.py
+++ b/Lib/test/test_pdb.py
@@ -359,6 +359,68 @@
"""
+def test_post_mortem():
+ """Test post mortem traceback debugging.
+
+ >>> def test_function_2():
+ ... try:
+ ... 1/0
+ ... finally:
+ ... print('Exception!')
+
+ >>> def test_function():
+ ... import pdb; pdb.Pdb().set_trace()
+ ... test_function_2()
+ ... print('Not reached.')
+
+ >>> with PdbTestInput([ # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
+ ... 'next', # step over exception-raising call
+ ... 'bt', # get a backtrace
+ ... 'list', # list code of test_function()
+ ... 'down', # step into test_function_2()
+ ... 'list', # list code of test_function_2()
+ ... 'continue',
+ ... ]):
+ ... try:
+ ... test_function()
+ ... except ZeroDivisionError:
+ ... print('Correctly reraised.')
+ > <doctest test.test_pdb.test_post_mortem[1]>(3)test_function()
+ -> test_function_2()
+ (Pdb) next
+ Exception!
+ ZeroDivisionError: division by zero
+ > <doctest test.test_pdb.test_post_mortem[1]>(3)test_function()
+ -> test_function_2()
+ (Pdb) bt
+ ...
+ <doctest test.test_pdb.test_post_mortem[2]>(10)<module>()
+ -> test_function()
+ > <doctest test.test_pdb.test_post_mortem[1]>(3)test_function()
+ -> test_function_2()
+ <doctest test.test_pdb.test_post_mortem[0]>(3)test_function_2()
+ -> 1/0
+ (Pdb) list
+ 1 def test_function():
+ 2 import pdb; pdb.Pdb().set_trace()
+ 3 -> test_function_2()
+ 4 print('Not reached.')
+ [EOF]
+ (Pdb) down
+ > <doctest test.test_pdb.test_post_mortem[0]>(3)test_function_2()
+ -> 1/0
+ (Pdb) list
+ 1 def test_function_2():
+ 2 try:
+ 3 >> 1/0
+ 4 finally:
+ 5 -> print('Exception!')
+ [EOF]
+ (Pdb) continue
+ Correctly reraised.
+ """
+
+
def test_pdb_skip_modules():
"""This illustrates the simple case of module skipping.