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test_pdb fails with an --forever argument #121651

Description

@Eclips4

Bug report

Bug description:

./python -m test -v test_pdb --forever
== CPython 3.14.0a0 (heads/main:dc03ce797a, Jul 12 2024, 21:10:05) [Clang 15.0.0 (clang-1500.3.9.4)]
== macOS-14.5-arm64-arm-64bit-Mach-O little-endian
== Python build: debug
== cwd: /Users/admin/Projects/cpython/build/test_python_worker_92101æ
== CPU count: 8
== encodings: locale=UTF-8 FS=utf-8
== resources: all test resources are disabled, use -u option to unskip tests

Using random seed: 265477390
0:00:00 load avg: 1.70 Run tests sequentially in a single process
0:00:00 load avg: 1.70 [  1] test_pdb
test_checkline_after_reset (test.test_pdb.ChecklineTests.test_checkline_after_reset) ... ok
test_checkline_before_debugging (test.test_pdb.ChecklineTests.test_checkline_before_debugging) ... ok
test_checkline_is_not_executable (test.test_pdb.ChecklineTests.test_checkline_is_not_executable) ... ok
test_blocks_at_first_code_line (test.test_pdb.PdbTestCase.test_blocks_at_first_code_line) ... ok
test_breakpoint (test.test_pdb.PdbTestCase.test_breakpoint) ... ok
test_dir_as_script (test.test_pdb.PdbTestCase.test_dir_as_script) ... ok
test_errors_in_command (test.test_pdb.PdbTestCase.test_errors_in_command) ... ok
test_file_modified_after_execution (test.test_pdb.PdbTestCase.test_file_modified_after_execution) ... ok
test_file_modified_after_execution_with_multiple_instances (test.test_pdb.PdbTestCase.test_file_modified_after_execution_with_multiple_instances) ... ok
test_file_modified_after_execution_with_restart (test.test_pdb.PdbTestCase.test_file_modified_after_execution_with_restart) ... ok
test_find_function_empty_file (test.test_pdb.PdbTestCase.test_find_function_empty_file) ... ok
test_find_function_first_executable_line (test.test_pdb.PdbTestCase.test_find_function_first_executable_line) ... ok
test_find_function_found (test.test_pdb.PdbTestCase.test_find_function_found) ... ok
test_find_function_found_with_bom (test.test_pdb.PdbTestCase.test_find_function_found_with_bom) ... ok
test_find_function_found_with_encoding_cookie (test.test_pdb.PdbTestCase.test_find_function_found_with_encoding_cookie) ... ok
test_gh_93696_frozen_list (test.test_pdb.PdbTestCase.test_gh_93696_frozen_list) ... ok
test_gh_94215_crash (test.test_pdb.PdbTestCase.test_gh_94215_crash) ... ok
test_header (test.test_pdb.PdbTestCase.test_header) ... ok
test_invalid_cmd_line_options (test.test_pdb.PdbTestCase.test_invalid_cmd_line_options) ... ok
test_issue13120 (test.test_pdb.PdbTestCase.test_issue13120) ... ok
test_issue13183 (test.test_pdb.PdbTestCase.test_issue13183) ... ok
test_issue16180 (test.test_pdb.PdbTestCase.test_issue16180) ... ok
test_issue26053 (test.test_pdb.PdbTestCase.test_issue26053) ... ok
test_issue34266 (test.test_pdb.PdbTestCase.test_issue34266)
do_run handles exceptions from parsing its arg ... ok
test_issue36250 (test.test_pdb.PdbTestCase.test_issue36250) ... ok
test_issue42383 (test.test_pdb.PdbTestCase.test_issue42383) ... ok
test_issue42384 (test.test_pdb.PdbTestCase.test_issue42384)
When running `python foo.py` sys.path[0] is an absolute path. `python -m pdb foo.py` should behave the same ... ok
test_issue42384_symlink (test.test_pdb.PdbTestCase.test_issue42384_symlink)
When running `python foo.py` sys.path[0] resolves symlinks. `python -m pdb foo.py` should behave the same ... ok
test_issue46434 (test.test_pdb.PdbTestCase.test_issue46434) ... ok
test_issue7964 (test.test_pdb.PdbTestCase.test_issue7964) ... ok
test_issue84583 (test.test_pdb.PdbTestCase.test_issue84583) ... ok
test_module_is_run_as_main (test.test_pdb.PdbTestCase.test_module_is_run_as_main) ... ok
test_module_without_a_main (test.test_pdb.PdbTestCase.test_module_without_a_main) ... ok
test_non_utf8_encoding (test.test_pdb.PdbTestCase.test_non_utf8_encoding) ... ok
test_nonexistent_module (test.test_pdb.PdbTestCase.test_nonexistent_module) ... ok
test_package_without_a_main (test.test_pdb.PdbTestCase.test_package_without_a_main) ... ok
test_pdbrc_alias (test.test_pdb.PdbTestCase.test_pdbrc_alias) ... ok
test_pdbrc_basic (test.test_pdb.PdbTestCase.test_pdbrc_basic) ... ok
test_pdbrc_commands (test.test_pdb.PdbTestCase.test_pdbrc_commands) ... ok
test_pdbrc_empty_line (test.test_pdb.PdbTestCase.test_pdbrc_empty_line)
Test that empty lines in .pdbrc are ignored. ... ok
test_pdbrc_semicolon (test.test_pdb.PdbTestCase.test_pdbrc_semicolon) ... ok
test_post_mortem_restart (test.test_pdb.PdbTestCase.test_post_mortem_restart) ... ok
test_readrc_homedir (test.test_pdb.PdbTestCase.test_readrc_homedir) ... ok
test_readrc_kwarg (test.test_pdb.PdbTestCase.test_readrc_kwarg) ... ok
test_relative_imports (test.test_pdb.PdbTestCase.test_relative_imports) ... ok
test_relative_imports_on_plain_module (test.test_pdb.PdbTestCase.test_relative_imports_on_plain_module) ... ok
test_run_module (test.test_pdb.PdbTestCase.test_run_module) ... ok
test_run_module_with_args (test.test_pdb.PdbTestCase.test_run_module_with_args) ... ok
test_run_pdb_with_pdb (test.test_pdb.PdbTestCase.test_run_pdb_with_pdb) ... ok
test_safe_path (test.test_pdb.PdbTestCase.test_safe_path)
With safe_path set, pdb should not mangle sys.path[0] ... ok
test_spec (test.test_pdb.PdbTestCase.test_spec) ... ok
test_zipapp (test.test_pdb.PdbTestCase.test_zipapp) ... ok
setUpClass (test.test_pdb.PdbTestReadline) ... skipped 'libedit readline is not supported for pdb'
test_convenience_variables (test.test_pdb)
Doctest: test.test_pdb.test_convenience_variables ... ok
test_list_commands (test.test_pdb)
Doctest: test.test_pdb.test_list_commands ... ok
test_next_until_return_at_return_event (test.test_pdb)
Doctest: test.test_pdb.test_next_until_return_at_return_event ... ok
test_pdb_alias_command (test.test_pdb)
Doctest: test.test_pdb.test_pdb_alias_command ... ok
test_pdb_ambiguous_statements (test.test_pdb)
Doctest: test.test_pdb.test_pdb_ambiguous_statements ... ok
test_pdb_basic_commands (test.test_pdb)
Doctest: test.test_pdb.test_pdb_basic_commands ... ok
test_pdb_breakpoint_commands (test.test_pdb)
Doctest: test.test_pdb.test_pdb_breakpoint_commands ... ok
test_pdb_breakpoint_with_filename (test.test_pdb)
Doctest: test.test_pdb.test_pdb_breakpoint_with_filename ... ok
test_pdb_breakpoints_preserved_across_interactive_sessions (test.test_pdb)
Doctest: test.test_pdb.test_pdb_breakpoints_preserved_across_interactive_sessions ... ok
test_pdb_closure (test.test_pdb)
Doctest: test.test_pdb.test_pdb_closure ... ok
test_pdb_continue_in_bottomframe (test.test_pdb)
Doctest: test.test_pdb.test_pdb_continue_in_bottomframe ... ok
test_pdb_display_command (test.test_pdb)
Doctest: test.test_pdb.test_pdb_display_command ... ok
test_pdb_displayhook (test.test_pdb)
Doctest: test.test_pdb.test_pdb_displayhook ... ok
test_pdb_empty_line (test.test_pdb)
Doctest: test.test_pdb.test_pdb_empty_line ... ok
test_pdb_f_trace_lines (test.test_pdb)
Doctest: test.test_pdb.test_pdb_f_trace_lines ... ok
test_pdb_function_break (test.test_pdb)
Doctest: test.test_pdb.test_pdb_function_break ... ok
test_pdb_interact_command (test.test_pdb)
Doctest: test.test_pdb.test_pdb_interact_command ... ok
test_pdb_invalid_arg (test.test_pdb)
Doctest: test.test_pdb.test_pdb_invalid_arg ... ok
test_pdb_issue_20766 (test.test_pdb)
Doctest: test.test_pdb.test_pdb_issue_20766 ... ok
test_pdb_issue_43318 (test.test_pdb)
Doctest: test.test_pdb.test_pdb_issue_43318 ... ok
test_pdb_issue_gh_101517 (test.test_pdb)
Doctest: test.test_pdb.test_pdb_issue_gh_101517 ... ok
test_pdb_issue_gh_101673 (test.test_pdb)
Doctest: test.test_pdb.test_pdb_issue_gh_101673 ... ok
test_pdb_issue_gh_103225 (test.test_pdb)
Doctest: test.test_pdb.test_pdb_issue_gh_103225 ... ok
test_pdb_issue_gh_108976 (test.test_pdb)
Doctest: test.test_pdb.test_pdb_issue_gh_108976 ... ok
test_pdb_issue_gh_65052 (test.test_pdb)
Doctest: test.test_pdb.test_pdb_issue_gh_65052 ... ok
test_pdb_issue_gh_80731 (test.test_pdb)
Doctest: test.test_pdb.test_pdb_issue_gh_80731 ... ok
test_pdb_issue_gh_91742 (test.test_pdb)
Doctest: test.test_pdb.test_pdb_issue_gh_91742 ... ok
test_pdb_issue_gh_94215 (test.test_pdb)
Doctest: test.test_pdb.test_pdb_issue_gh_94215 ... ok
test_pdb_multiline_statement (test.test_pdb)
Doctest: test.test_pdb.test_pdb_multiline_statement ... ok
test_pdb_next_command_for_asyncgen (test.test_pdb)
Doctest: test.test_pdb.test_pdb_next_command_for_asyncgen ... ok
test_pdb_next_command_for_coroutine (test.test_pdb)
Doctest: test.test_pdb.test_pdb_next_command_for_coroutine ... ok
test_pdb_next_command_for_generator (test.test_pdb)
Doctest: test.test_pdb.test_pdb_next_command_for_generator ... ok
test_pdb_next_command_in_generator_for_loop (test.test_pdb)
Doctest: test.test_pdb.test_pdb_next_command_in_generator_for_loop ... ok
test_pdb_next_command_subiterator (test.test_pdb)
Doctest: test.test_pdb.test_pdb_next_command_subiterator ... ok
test_pdb_pp_repr_exc (test.test_pdb)
Doctest: test.test_pdb.test_pdb_pp_repr_exc ... ok
test_pdb_return_command_for_coroutine (test.test_pdb)
Doctest: test.test_pdb.test_pdb_return_command_for_coroutine ... ok
test_pdb_return_command_for_generator (test.test_pdb)
Doctest: test.test_pdb.test_pdb_return_command_for_generator ... ok
test_pdb_return_to_different_file (test.test_pdb)
Doctest: test.test_pdb.test_pdb_return_to_different_file ... ok
test_pdb_run_with_code_object (test.test_pdb)
Doctest: test.test_pdb.test_pdb_run_with_code_object ... ok
test_pdb_run_with_incorrect_argument (test.test_pdb)
Doctest: test.test_pdb.test_pdb_run_with_incorrect_argument ... ok
test_pdb_show_attribute_and_item (test.test_pdb)
Doctest: test.test_pdb.test_pdb_show_attribute_and_item ... ok
test_pdb_skip_modules (test.test_pdb)
Doctest: test.test_pdb.test_pdb_skip_modules ... ok
test_pdb_skip_modules_with_callback (test.test_pdb)
Doctest: test.test_pdb.test_pdb_skip_modules_with_callback ... ok
test_pdb_until_command_for_coroutine (test.test_pdb)
Doctest: test.test_pdb.test_pdb_until_command_for_coroutine ... ok
test_pdb_until_command_for_generator (test.test_pdb)
Doctest: test.test_pdb.test_pdb_until_command_for_generator ... ok
test_pdb_whatis_command (test.test_pdb)
Doctest: test.test_pdb.test_pdb_whatis_command ... ok
test_pdb_where_command (test.test_pdb)
Doctest: test.test_pdb.test_pdb_where_command ... ok
test_pdb_with_inline_breakpoint (test.test_pdb)
Doctest: test.test_pdb.test_pdb_with_inline_breakpoint ... ok
test_post_mortem (test.test_pdb)
Doctest: test.test_pdb.test_post_mortem ... ok
test_post_mortem_cause_no_context (test.test_pdb)
Doctest: test.test_pdb.test_post_mortem_cause_no_context ... ok
test_post_mortem_chained (test.test_pdb)
Doctest: test.test_pdb.test_post_mortem_chained ... ok
test_post_mortem_complex (test.test_pdb)
Doctest: test.test_pdb.test_post_mortem_complex ... ok
test_post_mortem_context_of_the_cause (test.test_pdb)
Doctest: test.test_pdb.test_post_mortem_context_of_the_cause ... ok
test_post_mortem_from_no_stack (test.test_pdb)
Doctest: test.test_pdb.test_post_mortem_from_no_stack ... ok
test_post_mortem_from_none (test.test_pdb)
Doctest: test.test_pdb.test_post_mortem_from_none ... ok
test_post_mortem_single_no_stack (test.test_pdb)
Doctest: test.test_pdb.test_post_mortem_single_no_stack ... ok

----------------------------------------------------------------------
Ran 108 tests in 4.367s

OK (skipped=1)
0:00:04 load avg: 1.80 [  2] test_pdb
test_checkline_after_reset (test.test_pdb.ChecklineTests.test_checkline_after_reset) ... ok
test_checkline_before_debugging (test.test_pdb.ChecklineTests.test_checkline_before_debugging) ... ok
test_checkline_is_not_executable (test.test_pdb.ChecklineTests.test_checkline_is_not_executable) ... ok
test_blocks_at_first_code_line (test.test_pdb.PdbTestCase.test_blocks_at_first_code_line) ... ok
test_breakpoint (test.test_pdb.PdbTestCase.test_breakpoint) ... ok
test_dir_as_script (test.test_pdb.PdbTestCase.test_dir_as_script) ... ok
test_errors_in_command (test.test_pdb.PdbTestCase.test_errors_in_command) ... ok
test_file_modified_after_execution (test.test_pdb.PdbTestCase.test_file_modified_after_execution) ... ok
test_file_modified_after_execution_with_multiple_instances (test.test_pdb.PdbTestCase.test_file_modified_after_execution_with_multiple_instances) ... ok
test_file_modified_after_execution_with_restart (test.test_pdb.PdbTestCase.test_file_modified_after_execution_with_restart) ... ok
test_find_function_empty_file (test.test_pdb.PdbTestCase.test_find_function_empty_file) ... ok
test_find_function_first_executable_line (test.test_pdb.PdbTestCase.test_find_function_first_executable_line) ... ok
test_find_function_found (test.test_pdb.PdbTestCase.test_find_function_found) ... ok
test_find_function_found_with_bom (test.test_pdb.PdbTestCase.test_find_function_found_with_bom) ... ok
test_find_function_found_with_encoding_cookie (test.test_pdb.PdbTestCase.test_find_function_found_with_encoding_cookie) ... ok
test_gh_93696_frozen_list (test.test_pdb.PdbTestCase.test_gh_93696_frozen_list) ... ok
test_gh_94215_crash (test.test_pdb.PdbTestCase.test_gh_94215_crash) ... ok
test_header (test.test_pdb.PdbTestCase.test_header) ... FAIL

======================================================================
FAIL: test_header (test.test_pdb.PdbTestCase.test_header)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/admin/Projects/cpython/Lib/test/test_pdb.py", line 3394, in test_header
    self.assertEqual(stdout.getvalue(), header + '\n')
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: '' != 'Nobody expects... blah, blah, blah\n'
+ Nobody expects... blah, blah, blah


----------------------------------------------------------------------
Ran 18 tests in 0.812s

FAILED (failures=1)
test test_pdb failed

== Tests result: FAILURE ==

1 test failed:
    test_pdb

1 test OK.

Total duration: 5.4 sec
Total tests: run=126 failures=1 skipped=1
Total test files: run=2 failed=1
Result: FAILURE

CPython versions tested on:

CPython main branch

Operating systems tested on:

macOS

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