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test_embed fails if --exec-prefix and --prefix differ #151096

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test_embed fails if --exec-prefix and --prefix differ#151096
Labels
testsTests in the Lib/test dirtype-bugAn unexpected behavior, bug, or error

Description

@djerius
djerius
opened on Jun 8, 2026

Bug report

Bug description:

I've configured the Python build with separate --exec and --exec-prefix arguments as follows

./config.status --config:
--prefix=/proj/axaf/ots/python-3.14.5 --exec-prefix=/proj/axaf/ots/python-3.14.5/x86_64-linux_RHEL-8 --enable-optimizations PKG_CONFIG_PATH=/proj/axaf/ots/lib/pkgconfig:/proj/axaf/ots/x86_64-linux_RHEL-8/lib/pkgconfig:/proj/axaf/simul/lib/pkgconfig:/proj/axaf/simul/x86_64-linux_RHEL-8/lib/pkgconfig:/proj/axaf/lib/pkgconfig:/usr/lib64/pkgconfig:/usr/share/pkgconfig CC=/usr/bin/gcc

The build succeeds, and all tests pass except for test_embed. The full output of ./python -m test test_embed -v is at the end of this report (uploading the file failed). Partial output showing the specific error is:

======================================================================
FAIL: test_init_is_python_build_with_home (test.test_embed.InitConfigTests.test_init_is_python_build_with_home)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/pool/dj/python/Python-3.14.5/Lib/test/test_embed.py", line 1560, in test_init_is_python_build_with_home
    self.check_all_configs("test_init_is_python_build", config,
    ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                           api=API_COMPAT, env=env)
                           ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/pool/dj/python/Python-3.14.5/Lib/test/test_embed.py", line 991, in check_all_configs
    self.check_config(configs, expected_config)
    ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/pool/dj/python/Python-3.14.5/Lib/test/test_embed.py", line 917, in check_config
    self.assertEqual(config, expected)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^
AssertionError: {'argv': [''], 'base_exec_prefix': '/proj/a[2170 chars]None} != {'_config_init': 1, 'isolated': False, 'use[2130 chars]True}
  {'_config_init': 1,
   '_init_main': True,
   '_install_importlib': True,
   '_is_python_build': True,
   'argv': [''],
-  'base_exec_prefix': '/proj/axaf/ots/python-3.14.5/x86_64-linux_RHEL-8',
?                                                   --------------------

+  'base_exec_prefix': '/proj/axaf/ots/python-3.14.5',
[...]
-  'exec_prefix': '/proj/axaf/ots/python-3.14.5/x86_64-linux_RHEL-8',
?                                              --------------------

+  'exec_prefix': '/proj/axaf/ots/python-3.14.5',

Full log:

== CPython 3.14.5 (main, Jun 8 2026, 12:36:01) [GCC 8.5.0 20210514 (Red Hat 8.5.0-28)]
== Linux-4.18.0-553.123.1.el8_10.x86_64-x86_64-with-glibc2.28 little-endian
== Python build: release PGO
== cwd: /pool/dj/python/Python-3.14.5/build/test_python_worker_1942477æ
== CPU count: 256
== encodings: locale=UTF-8 FS=utf-8
== resources: all test resources are disabled, use -u option to unskip tests

Using random seed: 3488175452
0:00:00 load avg: 1.58 Run 1 test sequentially in a single process
0:00:00 load avg: 1.58 [1/1] test_embed
test_audit (test.test_embed.AuditingTests.test_audit) ... ok
test_audit_run_command (test.test_embed.AuditingTests.test_audit_run_command) ... ok
test_audit_run_file (test.test_embed.AuditingTests.test_audit_run_file) ... ok
test_audit_run_interactivehook (test.test_embed.AuditingTests.test_audit_run_interactivehook) ... ok
test_audit_run_startup (test.test_embed.AuditingTests.test_audit_run_startup) ... ok
test_audit_run_stdin (test.test_embed.AuditingTests.test_audit_run_stdin) ... ok
test_audit_subinterpreter (test.test_embed.AuditingTests.test_audit_subinterpreter) ... ok
test_audit_tuple (test.test_embed.AuditingTests.test_audit_tuple) ... ok
test_get_incomplete_frame (test.test_embed.AuditingTests.test_get_incomplete_frame) ... ok
test_open_code_hook (test.test_embed.AuditingTests.test_open_code_hook) ... ok
test_bpo20891 (test.test_embed.EmbeddingTests.test_bpo20891)
bpo-20891: Calling PyGILState_Ensure in a non-Python thread must not ... ok
test_datetime_reset_strptime (test.test_embed.EmbeddingTests.test_datetime_reset_strptime) ... ok
test_finalize_structseq (test.test_embed.EmbeddingTests.test_finalize_structseq) ... ok
test_forced_io_encoding (test.test_embed.EmbeddingTests.test_forced_io_encoding) ... ok
test_getargs_reset_static_parser (test.test_embed.EmbeddingTests.test_getargs_reset_static_parser) ... ok
test_initialize_pymain (test.test_embed.EmbeddingTests.test_initialize_pymain)
bpo-34008: Calling Py_Main() after Py_Initialize() must not fail. ... ok
test_initialize_twice (test.test_embed.EmbeddingTests.test_initialize_twice)
bpo-33932: Calling Py_Initialize() twice should do nothing (and not ... ok
test_inittab_submodule_multiphase (test.test_embed.EmbeddingTests.test_inittab_submodule_multiphase) ... ok
test_inittab_submodule_singlephase (test.test_embed.EmbeddingTests.test_inittab_submodule_singlephase) ... ok
test_pre_initialization_api (test.test_embed.EmbeddingTests.test_pre_initialization_api)
Checks some key parts of the C-API that need to work before the runtime ... ok
test_pre_initialization_sys_options (test.test_embed.EmbeddingTests.test_pre_initialization_sys_options)
Checks that sys.warnoptions and sys._xoptions can be set before the ... ok
test_repeated_init_and_inittab (test.test_embed.EmbeddingTests.test_repeated_init_and_inittab) ... ok
test_run_main (test.test_embed.EmbeddingTests.test_run_main) ... ok
test_run_main_loop (test.test_embed.EmbeddingTests.test_run_main_loop) ... ok
test_simple_initialization_api (test.test_embed.EmbeddingTests.test_simple_initialization_api) ... ok
test_specialized_static_code_gets_unspecialized_at_Py_FINALIZE (test.test_embed.EmbeddingTests.test_specialized_static_code_gets_unspecialized_at_Py_FINALIZE) ... ok
test_static_types_inherited_slots (test.test_embed.EmbeddingTests.test_static_types_inherited_slots) ... ok
test_subinterps_different_ids (test.test_embed.EmbeddingTests.test_subinterps_different_ids) ... ok
test_subinterps_distinct_state (test.test_embed.EmbeddingTests.test_subinterps_distinct_state) ... ok
test_subinterps_main (test.test_embed.EmbeddingTests.test_subinterps_main) ... ok
test_ucnhash_capi_reset (test.test_embed.EmbeddingTests.test_ucnhash_capi_reset) ... ok
test_get_argc_argv (test.test_embed.InitConfigTests.test_get_argc_argv) ... ok
test_getpath_abspath_win32 (test.test_embed.InitConfigTests.test_getpath_abspath_win32) ... skipped 'specific to Windows'
test_global_pathconfig (test.test_embed.InitConfigTests.test_global_pathconfig) ... ok
test_init_compat_config (test.test_embed.InitConfigTests.test_init_compat_config) ... ok
test_init_compat_env (test.test_embed.InitConfigTests.test_init_compat_env) ... skipped 'segfaults on BOLT instrumented binaries'
test_init_default_config (test.test_embed.InitConfigTests.test_init_default_config) ... skipped 'segfaults on BOLT instrumented binaries'
test_init_dev_mode (test.test_embed.InitConfigTests.test_init_dev_mode) ... ok
test_init_dont_configure_locale (test.test_embed.InitConfigTests.test_init_dont_configure_locale) ... ok
test_init_dont_parse_argv (test.test_embed.InitConfigTests.test_init_dont_parse_argv) ... ok
test_init_env_dev_mode (test.test_embed.InitConfigTests.test_init_env_dev_mode) ... ok
test_init_env_dev_mode_alloc (test.test_embed.InitConfigTests.test_init_env_dev_mode_alloc) ... ok
test_init_from_config (test.test_embed.InitConfigTests.test_init_from_config) ... ok
test_init_global_config (test.test_embed.InitConfigTests.test_init_global_config) ... ok
test_init_in_background_thread (test.test_embed.InitConfigTests.test_init_in_background_thread) ... ok
test_init_is_python_build_with_home (test.test_embed.InitConfigTests.test_init_is_python_build_with_home) ... FAIL
test_init_isolated_config (test.test_embed.InitConfigTests.test_init_isolated_config) ... ok
test_init_isolated_flag (test.test_embed.InitConfigTests.test_init_isolated_flag) ... ok
test_init_main_interpreter_settings (test.test_embed.InitConfigTests.test_init_main_interpreter_settings) ... ok
test_init_parse_argv (test.test_embed.InitConfigTests.test_init_parse_argv) ... ok
test_init_pybuilddir (test.test_embed.InitConfigTests.test_init_pybuilddir) ... ok
test_init_pybuilddir_win32 (test.test_embed.InitConfigTests.test_init_pybuilddir_win32) ... skipped 'See test_init_pybuilddir'
test_init_python_config (test.test_embed.InitConfigTests.test_init_python_config) ... ok
test_init_python_env (test.test_embed.InitConfigTests.test_init_python_env) ... skipped 'segfaults on BOLT instrumented binaries'
test_init_pyvenv_cfg (test.test_embed.InitConfigTests.test_init_pyvenv_cfg) ... ok
test_init_read_set (test.test_embed.InitConfigTests.test_init_read_set) ... skipped 'as of 3.11 this test no longer works because path calculations do not occur on read'
test_init_run_main (test.test_embed.InitConfigTests.test_init_run_main) ... ok
test_init_setpath (test.test_embed.InitConfigTests.test_init_setpath) ... ok
test_init_setpath_config (test.test_embed.InitConfigTests.test_init_setpath_config) ... ok
test_init_setpythonhome (test.test_embed.InitConfigTests.test_init_setpythonhome) ... ok
test_init_sys_add (test.test_embed.InitConfigTests.test_init_sys_add) ... ok
test_init_use_frozen_modules (test.test_embed.InitConfigTests.test_init_use_frozen_modules) ... ok
test_init_warnoptions (test.test_embed.InitConfigTests.test_init_warnoptions) ... ok
test_initconfig_api (test.test_embed.InitConfigTests.test_initconfig_api) ... skipped 'segfaults on BOLT instrumented binaries'
test_initconfig_exit (test.test_embed.InitConfigTests.test_initconfig_exit) ... ok
test_initconfig_get_api (test.test_embed.InitConfigTests.test_initconfig_get_api) ... ok
test_initconfig_module (test.test_embed.InitConfigTests.test_initconfig_module) ... ok
test_preinit_compat_config (test.test_embed.InitConfigTests.test_preinit_compat_config) ... ok
test_preinit_dont_parse_argv (test.test_embed.InitConfigTests.test_preinit_dont_parse_argv) ... ok
test_preinit_isolated1 (test.test_embed.InitConfigTests.test_preinit_isolated1) ... ok
test_preinit_isolated2 (test.test_embed.InitConfigTests.test_preinit_isolated2) ... ok
test_preinit_isolated_config (test.test_embed.InitConfigTests.test_preinit_isolated_config) ... ok
test_preinit_parse_argv (test.test_embed.InitConfigTests.test_preinit_parse_argv) ... ok
test_preinit_python_config (test.test_embed.InitConfigTests.test_preinit_python_config) ... ok
test_frozenmain (test.test_embed.MiscTests.test_frozenmain) ... ok
test_no_memleak (test.test_embed.MiscTests.test_no_memleak) ... skipped '-X showrefcount requires a Python debug build'
test_presite (test.test_embed.MiscTests.test_presite) ... skipped '-X presite requires a Python debug build'
test_unicode_id_init (test.test_embed.MiscTests.test_unicode_id_init) ... ok

======================================================================
FAIL: test_init_is_python_build_with_home (test.test_embed.InitConfigTests.test_init_is_python_build_with_home)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/pool/dj/python/Python-3.14.5/Lib/test/test_embed.py", line 1560, in test_init_is_python_build_with_home
    self.check_all_configs("test_init_is_python_build", config,
    ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                           api=API_COMPAT, env=env)
                           ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/pool/dj/python/Python-3.14.5/Lib/test/test_embed.py", line 991, in check_all_configs
    self.check_config(configs, expected_config)
    ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/pool/dj/python/Python-3.14.5/Lib/test/test_embed.py", line 917, in check_config
    self.assertEqual(config, expected)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^
AssertionError: {'argv': [''], 'base_exec_prefix': '/proj/a[2170 chars]None} != {'_config_init': 1, 'isolated': False, 'use[2130 chars]True}
  {'_config_init': 1,
   '_init_main': True,
   '_install_importlib': True,
   '_is_python_build': True,
   'argv': [''],
-  'base_exec_prefix': '/proj/axaf/ots/python-3.14.5/x86_64-linux_RHEL-8',
?                                                   --------------------

+  'base_exec_prefix': '/proj/axaf/ots/python-3.14.5',
   'base_executable': '/pool/dj/python/Python-3.14.5/_testembed',
   'base_prefix': '/proj/axaf/ots/python-3.14.5',
   'buffered_stdio': True,
   'bytes_warning': 0,
   'check_hash_pycs_mode': 'default',
   'code_debug_ranges': True,
   'configure_c_stdio': False,
   'context_aware_warnings': 0,
   'cpu_count': -1,
   'dev_mode': False,
   'dump_refs': False,
   'dump_refs_file': None,
-  'exec_prefix': '/proj/axaf/ots/python-3.14.5/x86_64-linux_RHEL-8',
?                                              --------------------

+  'exec_prefix': '/proj/axaf/ots/python-3.14.5',
   'executable': '/pool/dj/python/Python-3.14.5/_testembed',
   'faulthandler': False,
   'hash_seed': 0,
   'home': '/pool/dj/python/Python-3.14.5',
   'import_time': 0,
   'inspect': False,
   'install_signal_handlers': True,
   'int_max_str_digits': 4300,
   'interactive': False,
   'isolated': False,
   'malloc_stats': False,
   'module_search_paths': ['/proj/axaf/ots/python-3.14.5/lib/python314.zip',
                           '/pool/dj/python/Python-3.14.5/Lib',
                           '/pool/dj/python/Python-3.14.5/build/lib.linux-x86_64-3.14',
                           '/proj/axaf/ots/python-3.14.5/lib/python314.zip',
                           '/pool/dj/python/Python-3.14.5/lib/python3.14',
                           '/pool/dj/python/Python-3.14.5/build/lib.linux-x86_64-3.14'],
   'module_search_paths_set': True,
   'optimization_level': 0,
   'orig_argv': [],
   'parse_argv': False,
   'parser_debug': False,
   'pathconfig_warnings': True,
   'perf_profiling': 0,
   'platlibdir': 'lib',
   'prefix': '/proj/axaf/ots/python-3.14.5',
   'program_name': './_testembed',
   'pycache_prefix': None,
   'pythonpath_env': '/proj/axaf/ots/python-3.14.5/lib/python314.zip:/pool/dj/python/Python-3.14.5/Lib:/pool/dj/python/Python-3.14.5/build/lib.linux-x86_64-3.14',
   'quiet': False,
   'remote_debug': True,
   'run_command': None,
   'run_filename': None,
   'run_module': None,
   'safe_path': False,
   'show_ref_count': False,
   'site_import': True,
   'skip_source_first_line': False,
   'stdlib_dir': '/pool/dj/python/Python-3.14.5/lib/python3.14',
   'sys_path_0': None,
   'thread_inherit_context': 0,
   'tracemalloc': 0,
   'use_environment': True,
   'use_frozen_modules': True,
   'use_hash_seed': False,
   'user_site_directory': True,
   'verbose': 0,
   'warn_default_encoding': False,
   'warnoptions': [],
   'write_bytecode': True,
   'xoptions': {}}

----------------------------------------------------------------------
Ran 78 tests in 3.088s

FAILED (failures=1, skipped=9)
test test_embed failed
0:00:03 load avg: 1.78 [1/1/1] test_embed failed (1 failure)

== Tests result: FAILURE ==

1 test failed:
    test_embed

Total duration: 3.1 sec
Total tests: run=78 failures=1 skipped=9
Total test files: run=1/1 failed=1
Result: FAILURE

CPython versions tested on:

3.14

Operating systems tested on:

Linux

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