GH-145273: warn when we can't find the standard library by FFY00 · Pull Request #145274 · python/cpython

FFY00 · 2026-02-26T20:52:53Z

Issue: Issue warning when the we can't find a valid standard library during path initialization #145273

Signed-off-by: Filipe Laíns <lains@riseup.net>

FFY00 · 2026-02-26T21:10:21Z

The main issue with this is that we don't have a way to disable these warnings, which is resolved by GH-145277.

Signed-off-by: Filipe Laíns <lains@riseup.net>

FFY00 · 2026-02-26T22:26:43Z

Modules/getpath.py

+    if not stdlib_dir or not isdir(stdlib_dir):
+        hint = home_hint if home else f'sys.prefix is set to {prefix}, is this correct?'
+        warn('WARN: Could not find the standard library directory! ' + hint)
+    elif (not platstdlib_dir and not build_prefix) or not isdir(platstdlib_dir):


I fixed the tests, but unless we skip the platstdlib_dir check when running from source, the warning will show up on make, during the pybuilddir.txt generation.

I would prefer to drop the build_prefix check, and instead add -X pathconfig_warnings=0 to the -m sysconfig --generate-posix-vars call in the makefile.

Suggested change

elif (not platstdlib_dir and not build_prefix) or not isdir(platstdlib_dir):

elif not platstdlib_dir or not isdir(platstdlib_dir):

Signed-off-by: Filipe Laíns <lains@riseup.net>

FFY00 · 2026-02-27T00:29:09Z

I was thinking the symlink tests were failing on Windows because the getpath implementation of isdir/isfile didn't follow the link, but looking at the GetFileAttributesW documentation, it says it does follow symlinks.

This means the tests were failing because the symlink target did not exist, but in test_platform,PlatformTest.test_architecture_via_symlink for eg. I cannot see how that's possible? It uses test.support.PythonSymlink, which checks for it.

cpython/Lib/test/support/__init__.py

Lines 1700 to 1703 in 06b0920

    
           if os.path.lexists(self.real) and not os.path.exists(self.real): 
        
               # App symlink appears to not exist, but we want the 
        
               # real executable here anyway 
        
               self.real = _winapi.GetModuleFileName(0)

This reverts commit 3a67467. Signed-off-by: Filipe Laíns <lains@riseup.net>

Signed-off-by: Filipe Laíns <lains@riseup.net>

FFY00 · 2026-02-27T01:09:45Z

Ah, test.support.PythonSymlink is not setting PYTHONHOME correctly. It sets it based on the executable, and it knows this is incorrect on source builds, so it sets PYTHONPATH as a workaround.

cpython/Lib/test/support/__init__.py

Lines 1719 to 1721 in 06b0920

    
           self._env["PYTHONHOME"] = os.path.dirname(self.real) 
        
           if sysconfig.is_python_build(): 
        
               self._env["PYTHONPATH"] = STDLIB_DIR

I am not familiar with the build on Windows, but looking at getpath I see that on source builds it set the prefix to VPATH.

FFY00 · 2026-02-27T01:20:18Z

It's weird that it needs to set PYTHONHOME though. Did getpath perhaps not resolve the executable symlink in the past?

Anyway, the CI is still finishing, but test_platform has passed, so I guess it is fixed. That's enough debugging through CI for the day 😅

Signed-off-by: Filipe Laíns <lains@riseup.net>

FFY00 · 2026-03-02T18:36:47Z

The tests look good now.

FFY00 · 2026-03-02T18:37:46Z

I'll remove the build_prefix check after GH-145277 is merged.

bedevere-bot · 2026-03-02T19:00:54Z

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot x86 Debian Installed with X 3.x (no tier) has failed when building commit 3ab39d2.

What do you need to do:

Don't panic.
Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
Go to the page of the buildbot that failed (https://buildbot.python.org/#/builders/1244/builds/7583) and take a look at the build logs.
Check if the failure is related to this commit (3ab39d2) or if it is a false positive.
If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/#/builders/1244/builds/7583

Summary of the results of the build (if available):

==

Click to see traceback logs

Traceback (most recent call last):
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/datetimetester.py"�[0m, line �[35m7475�[0m, in �[35mtest_concurrent_initialization_subinterpreter�[0m
    �[31mself.assertEqual�[0m�[1;31m(err, b"")�[0m
    �[31m~~~~~~~~~~~~~~~~�[0m�[1;31m^^^^^^^^^^�[0m
�[1;35mAssertionError�[0m: �[35mb'WARN: Could not find the platform standar[1315 chars]t?\n' != b''�[0m


Traceback (most recent call last):
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/test_import/__init__.py"�[0m, line �[35m2394�[0m, in �[35mtest_multi_init_extension_compat�[0m
    �[31mself.check_compatible_fresh�[0m�[1;31m(module, strict=True)�[0m
    �[31m~~~~~~~~~~~~~~~~~~~~~~~~~~~�[0m�[1;31m^^^^^^^^^^^^^^^^^^^^^�[0m
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/test_import/__init__.py"�[0m, line �[35m2313�[0m, in �[35mcheck_compatible_fresh�[0m
    �[31mself.assertEqual�[0m�[1;31m(err, b'')�[0m
    �[31m~~~~~~~~~~~~~~~~�[0m�[1;31m^^^^^^^^^^�[0m
�[1;35mAssertionError�[0m: �[35mb'WARN: Could not find the platform standar[125 chars]t?\n' != b''�[0m


Traceback (most recent call last):
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/support/__init__.py"�[0m, line �[35m3049�[0m, in �[35mwrapper�[0m
    return func(*args, **kwargs)
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/test_interpreters/test_api.py"�[0m, line �[35m938�[0m, in �[35mtest_display_preserved_exception�[0m
    �[31mself.assertEqual�[0m�[1;31m(stderr, dedent(f"""\�[0m
    �[31m~~~~~~~~~~~~~~~~�[0m�[1;31m^^^^^^^^^^^^^^^^^^^^^�[0m
        �[1;31mTraceback (most recent call last):�[0m
        �[1;31m^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^�[0m
    ...<18 lines>...
        �[1;31mRuntimeError: uh-oh!�[0m
        �[1;31m^^^^^^^^^^^^^^^^^^^^�[0m
        �[1;31m"""))�[0m
        �[1;31m^^^^^�[0m
�[1;35mAssertionError�[0m: �[35m'WARN: Could not find the platform standar[939 chars]h!\n' != 'Traceback (most recent call last):\n  Fil[769 chars]h!\n'
- WARN: Could not find the platform standard library directory! sys.exec_prefix is set to /buildbot/buildarea/3.x.ware-debian-x86.installed/build/target, is this correct?
  Traceback (most recent call last):
    File "/tmp/test_python_59d_k399/tmp9_m98wlo/script.py", line 10, in <module>
      interp.exec(script)
      ~~~~~~~~~~~^^^^^^^^
    File "/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/concurrent/interpreters/__init__.py", line 217, in exec
      raise ExecutionFailed(excinfo)
  concurrent.interpreters.ExecutionFailed: RuntimeError: uh-oh!
  
  Uncaught in the interpreter:
  
  Traceback (most recent call last):
    File "/tmp/test_python_59d_k399/tmp9_m98wlo/script.py", line 6, in script
      spam.eggs()
      ~~~~~~~~~^^
    File "/tmp/test_python_59d_k399/tmp9_m98wlo/spam.py", line 6, in eggs
      ham()
      ~~~^^
    File "/tmp/test_python_59d_k399/tmp9_m98wlo/spam.py", line 3, in ham
      raise RuntimeError('uh-oh!')
  RuntimeError: uh-oh!
�[0m


TracebackTests.test_exec_failure) ... �[32mok�[0m


Traceback (most recent call last):
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/test_import/__init__.py"�[0m, line �[35m2380�[0m, in �[35mtest_single_init_extension_compat�[0m
    �[31mself.check_incompatible_fresh�[0m�[1;31m(module, isolated=True)�[0m
    �[31m~~~~~~~~~~~~~~~~~~~~~~~~~~~~~�[0m�[1;31m^^^^^^^^^^^^^^^^^^^^^^^�[0m
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/test_import/__init__.py"�[0m, line �[35m2338�[0m, in �[35mcheck_incompatible_fresh�[0m
    �[31mself.assertEqual�[0m�[1;31m(err, b'')�[0m
    �[31m~~~~~~~~~~~~~~~~�[0m�[1;31m^^^^^^^^^^�[0m
�[1;35mAssertionError�[0m: �[35mb'WARN: Could not find the platform standar[125 chars]t?\n' != b''�[0m


Traceback (most recent call last):
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/test_import/__init__.py"�[0m, line �[35m2466�[0m, in �[35mtest_python_compat�[0m
    �[31mself.check_compatible_fresh�[0m�[1;31m(module, strict=True)�[0m
    �[31m~~~~~~~~~~~~~~~~~~~~~~~~~~~�[0m�[1;31m^^^^^^^^^^^^^^^^^^^^^�[0m
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/test_import/__init__.py"�[0m, line �[35m2313�[0m, in �[35mcheck_compatible_fresh�[0m
    �[31mself.assertEqual�[0m�[1;31m(err, b'')�[0m
    �[31m~~~~~~~~~~~~~~~~�[0m�[1;31m^^^^^^^^^^�[0m
�[1;35mAssertionError�[0m: �[35mb'WARN: Could not find the platform standar[125 chars]t?\n' != b''�[0m


Traceback (most recent call last):
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/test_interpreters/test_lifecycle.py"�[0m, line �[35m29�[0m, in �[35msubTest�[0m
    yield ctx
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/test_interpreters/test_lifecycle.py"�[0m, line �[35m158�[0m, in �[35mtest_sys_path_0�[0m
    out = self.run_python(argv, cwd=cwd)
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/test_interpreters/test_lifecycle.py"�[0m, line �[35m109�[0m, in �[35mrun_python�[0m
    assert �[1;31mproc.stderr == '' or proc.returncode != 0�[0m, proc.stderr
           �[1;31m^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^�[0m
�[1;35mAssertionError�[0m: �[35mWARN: Could not find the platform standard library directory! sys.exec_prefix is set to /buildbot/buildarea/3.x.ware-debian-x86.installed/build/target, is this correct?
�[0m


Traceback (most recent call last):
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/support/__init__.py"�[0m, line �[35m3049�[0m, in �[35mwrapper�[0m
    return func(*args, **kwargs)
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/test_interpreters/test_api.py"�[0m, line �[35m938�[0m, in �[35mtest_display_preserved_exception�[0m
    �[31mself.assertEqual�[0m�[1;31m(stderr, dedent(f"""\�[0m
    �[31m~~~~~~~~~~~~~~~~�[0m�[1;31m^^^^^^^^^^^^^^^^^^^^^�[0m
        �[1;31mTraceback (most recent call last):�[0m
        �[1;31m^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^�[0m
    ...<18 lines>...
        �[1;31mRuntimeError: uh-oh!�[0m
        �[1;31m^^^^^^^^^^^^^^^^^^^^�[0m
        �[1;31m"""))�[0m
        �[1;31m^^^^^�[0m
�[1;35mAssertionError�[0m: �[35m'WARN: Could not find the platform standar[939 chars]h!\n' != 'Traceback (most recent call last):\n  Fil[769 chars]h!\n'
- WARN: Could not find the platform standard library directory! sys.exec_prefix is set to /buildbot/buildarea/3.x.ware-debian-x86.installed/build/target, is this correct?
  Traceback (most recent call last):
    File "/tmp/test_python_ykrmgwg9/tmpw67f80o1/script.py", line 10, in <module>
      interp.exec(script)
      ~~~~~~~~~~~^^^^^^^^
    File "/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/concurrent/interpreters/__init__.py", line 217, in exec
      raise ExecutionFailed(excinfo)
  concurrent.interpreters.ExecutionFailed: RuntimeError: uh-oh!
  
  Uncaught in the interpreter:
  
  Traceback (most recent call last):
    File "/tmp/test_python_ykrmgwg9/tmpw67f80o1/script.py", line 6, in script
      spam.eggs()
      ~~~~~~~~~^^
    File "/tmp/test_python_ykrmgwg9/tmpw67f80o1/spam.py", line 6, in eggs
      ham()
      ~~~^^
    File "/tmp/test_python_ykrmgwg9/tmpw67f80o1/spam.py", line 3, in ham
      raise RuntimeError('uh-oh!')
  RuntimeError: uh-oh!
�[0m


TracebackTests.test_broken_submodule) ... �[32mok�[0m


Traceback (most recent call last):
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/test_import/__init__.py"�[0m, line �[35m2510�[0m, in �[35mtest_isolated_config�[0m
    �[31mself.check_compatible_fresh�[0m�[1;31m(module, strict=True, isolated=True)�[0m
    �[31m~~~~~~~~~~~~~~~~~~~~~~~~~~~�[0m�[1;31m^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^�[0m
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/test_import/__init__.py"�[0m, line �[35m2313�[0m, in �[35mcheck_compatible_fresh�[0m
    �[31mself.assertEqual�[0m�[1;31m(err, b'')�[0m
    �[31m~~~~~~~~~~~~~~~~�[0m�[1;31m^^^^^^^^^^�[0m
�[1;35mAssertionError�[0m: �[35mb'WARN: Could not find the platform standar[125 chars]t?\n' != b''�[0m


TracebackTests.test_broken_parent) ... �[32mok�[0m


TracebackTests.test_broken_parent_from) ... �[32mok�[0m


TracebackTests.test_nonexistent_module_nested) ... �[32mok�[0m


Traceback (most recent call last):
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/test_import/__init__.py"�[0m, line �[35m2378�[0m, in �[35mtest_single_init_extension_compat�[0m
    �[31mself.check_incompatible_fresh�[0m�[1;31m(module)�[0m
    �[31m~~~~~~~~~~~~~~~~~~~~~~~~~~~~~�[0m�[1;31m^^^^^^^^�[0m
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/test_import/__init__.py"�[0m, line �[35m2338�[0m, in �[35mcheck_incompatible_fresh�[0m
    �[31mself.assertEqual�[0m�[1;31m(err, b'')�[0m
    �[31m~~~~~~~~~~~~~~~~�[0m�[1;31m^^^^^^^^^^�[0m
�[1;35mAssertionError�[0m: �[35mb'WARN: Could not find the platform standar[125 chars]t?\n' != b''�[0m


TracebackTests.test_syntax_error) ... �[32mok�[0m


TracebackTests.test_exec_failure_nested) ... �[32mok�[0m


TracebackTests.test_broken_from) ... �[32mok�[0m


TracebackTests.test_unencodable_filename) ... �[32mok�[0m


TracebackTests.test_import_bug) ... �[32mok�[0m


TracebackTests.test_nonexistent_module) ... �[32mok�[0m

Signed-off-by: Filipe Laíns <lains@riseup.net>

FFY00 · 2026-03-02T19:24:45Z

I was able to reproduce the buildbot failure locally. I'm working on a fix.

bedevere-bot · 2026-03-02T19:34:33Z

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot x86 Debian Installed with X 3.x (no tier) has failed when building commit 3ab39d2.

What do you need to do:

Don't panic.
Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
Go to the page of the buildbot that failed (https://buildbot.python.org/#/builders/1244/builds/7584) and take a look at the build logs.
Check if the failure is related to this commit (3ab39d2) or if it is a false positive.
If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/#/builders/1244/builds/7584

Summary of the results of the build (if available):

==

Click to see traceback logs

Traceback (most recent call last):
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/datetimetester.py"�[0m, line �[35m7475�[0m, in �[35mtest_concurrent_initialization_subinterpreter�[0m
    �[31mself.assertEqual�[0m�[1;31m(err, b"")�[0m
    �[31m~~~~~~~~~~~~~~~~�[0m�[1;31m^^^^^^^^^^�[0m
�[1;35mAssertionError�[0m: �[35mb'WARN: Could not find the platform standar[1315 chars]t?\n' != b''�[0m


Traceback (most recent call last):
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/test_import/__init__.py"�[0m, line �[35m2394�[0m, in �[35mtest_multi_init_extension_compat�[0m
    �[31mself.check_compatible_fresh�[0m�[1;31m(module, strict=True)�[0m
    �[31m~~~~~~~~~~~~~~~~~~~~~~~~~~~�[0m�[1;31m^^^^^^^^^^^^^^^^^^^^^�[0m
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/test_import/__init__.py"�[0m, line �[35m2313�[0m, in �[35mcheck_compatible_fresh�[0m
    �[31mself.assertEqual�[0m�[1;31m(err, b'')�[0m
    �[31m~~~~~~~~~~~~~~~~�[0m�[1;31m^^^^^^^^^^�[0m
�[1;35mAssertionError�[0m: �[35mb'WARN: Could not find the platform standar[125 chars]t?\n' != b''�[0m


TracebackTests.test_exec_failure) ... �[32mok�[0m


Traceback (most recent call last):
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/test_import/__init__.py"�[0m, line �[35m2380�[0m, in �[35mtest_single_init_extension_compat�[0m
    �[31mself.check_incompatible_fresh�[0m�[1;31m(module, isolated=True)�[0m
    �[31m~~~~~~~~~~~~~~~~~~~~~~~~~~~~~�[0m�[1;31m^^^^^^^^^^^^^^^^^^^^^^^�[0m
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/test_import/__init__.py"�[0m, line �[35m2338�[0m, in �[35mcheck_incompatible_fresh�[0m
    �[31mself.assertEqual�[0m�[1;31m(err, b'')�[0m
    �[31m~~~~~~~~~~~~~~~~�[0m�[1;31m^^^^^^^^^^�[0m
�[1;35mAssertionError�[0m: �[35mb'WARN: Could not find the platform standar[125 chars]t?\n' != b''�[0m


Traceback (most recent call last):
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/test_import/__init__.py"�[0m, line �[35m2466�[0m, in �[35mtest_python_compat�[0m
    �[31mself.check_compatible_fresh�[0m�[1;31m(module, strict=True)�[0m
    �[31m~~~~~~~~~~~~~~~~~~~~~~~~~~~�[0m�[1;31m^^^^^^^^^^^^^^^^^^^^^�[0m
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/test_import/__init__.py"�[0m, line �[35m2313�[0m, in �[35mcheck_compatible_fresh�[0m
    �[31mself.assertEqual�[0m�[1;31m(err, b'')�[0m
    �[31m~~~~~~~~~~~~~~~~�[0m�[1;31m^^^^^^^^^^�[0m
�[1;35mAssertionError�[0m: �[35mb'WARN: Could not find the platform standar[125 chars]t?\n' != b''�[0m


Traceback (most recent call last):
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/test_interpreters/test_lifecycle.py"�[0m, line �[35m29�[0m, in �[35msubTest�[0m
    yield ctx
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/test_interpreters/test_lifecycle.py"�[0m, line �[35m158�[0m, in �[35mtest_sys_path_0�[0m
    out = self.run_python(argv, cwd=cwd)
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/test_interpreters/test_lifecycle.py"�[0m, line �[35m109�[0m, in �[35mrun_python�[0m
    assert �[1;31mproc.stderr == '' or proc.returncode != 0�[0m, proc.stderr
           �[1;31m^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^�[0m
�[1;35mAssertionError�[0m: �[35mWARN: Could not find the platform standard library directory! sys.exec_prefix is set to /buildbot/buildarea/3.x.ware-debian-x86.installed/build/target, is this correct?
�[0m


TracebackTests.test_broken_submodule) ... �[32mok�[0m


Traceback (most recent call last):
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/test_import/__init__.py"�[0m, line �[35m2510�[0m, in �[35mtest_isolated_config�[0m
    �[31mself.check_compatible_fresh�[0m�[1;31m(module, strict=True, isolated=True)�[0m
    �[31m~~~~~~~~~~~~~~~~~~~~~~~~~~~�[0m�[1;31m^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^�[0m
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/test_import/__init__.py"�[0m, line �[35m2313�[0m, in �[35mcheck_compatible_fresh�[0m
    �[31mself.assertEqual�[0m�[1;31m(err, b'')�[0m
    �[31m~~~~~~~~~~~~~~~~�[0m�[1;31m^^^^^^^^^^�[0m
�[1;35mAssertionError�[0m: �[35mb'WARN: Could not find the platform standar[125 chars]t?\n' != b''�[0m


TracebackTests.test_broken_parent) ... �[32mok�[0m


TracebackTests.test_broken_parent_from) ... �[32mok�[0m


Traceback (most recent call last):
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/support/__init__.py"�[0m, line �[35m3049�[0m, in �[35mwrapper�[0m
    return func(*args, **kwargs)
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/test_interpreters/test_api.py"�[0m, line �[35m938�[0m, in �[35mtest_display_preserved_exception�[0m
    �[31mself.assertEqual�[0m�[1;31m(stderr, dedent(f"""\�[0m
    �[31m~~~~~~~~~~~~~~~~�[0m�[1;31m^^^^^^^^^^^^^^^^^^^^^�[0m
        �[1;31mTraceback (most recent call last):�[0m
        �[1;31m^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^�[0m
    ...<18 lines>...
        �[1;31mRuntimeError: uh-oh!�[0m
        �[1;31m^^^^^^^^^^^^^^^^^^^^�[0m
        �[1;31m"""))�[0m
        �[1;31m^^^^^�[0m
�[1;35mAssertionError�[0m: �[35m'WARN: Could not find the platform standar[939 chars]h!\n' != 'Traceback (most recent call last):\n  Fil[769 chars]h!\n'
- WARN: Could not find the platform standard library directory! sys.exec_prefix is set to /buildbot/buildarea/3.x.ware-debian-x86.installed/build/target, is this correct?
  Traceback (most recent call last):
    File "/tmp/test_python_qv5ah4vx/tmpvisefb29/script.py", line 10, in <module>
      interp.exec(script)
      ~~~~~~~~~~~^^^^^^^^
    File "/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/concurrent/interpreters/__init__.py", line 217, in exec
      raise ExecutionFailed(excinfo)
  concurrent.interpreters.ExecutionFailed: RuntimeError: uh-oh!
  
  Uncaught in the interpreter:
  
  Traceback (most recent call last):
    File "/tmp/test_python_qv5ah4vx/tmpvisefb29/script.py", line 6, in script
      spam.eggs()
      ~~~~~~~~~^^
    File "/tmp/test_python_qv5ah4vx/tmpvisefb29/spam.py", line 6, in eggs
      ham()
      ~~~^^
    File "/tmp/test_python_qv5ah4vx/tmpvisefb29/spam.py", line 3, in ham
      raise RuntimeError('uh-oh!')
  RuntimeError: uh-oh!
�[0m


TracebackTests.test_nonexistent_module_nested) ... �[32mok�[0m


Traceback (most recent call last):
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/test_import/__init__.py"�[0m, line �[35m2378�[0m, in �[35mtest_single_init_extension_compat�[0m
    �[31mself.check_incompatible_fresh�[0m�[1;31m(module)�[0m
    �[31m~~~~~~~~~~~~~~~~~~~~~~~~~~~~~�[0m�[1;31m^^^^^^^^�[0m
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/test_import/__init__.py"�[0m, line �[35m2338�[0m, in �[35mcheck_incompatible_fresh�[0m
    �[31mself.assertEqual�[0m�[1;31m(err, b'')�[0m
    �[31m~~~~~~~~~~~~~~~~�[0m�[1;31m^^^^^^^^^^�[0m
�[1;35mAssertionError�[0m: �[35mb'WARN: Could not find the platform standar[125 chars]t?\n' != b''�[0m


TracebackTests.test_syntax_error) ... �[32mok�[0m


TracebackTests.test_exec_failure_nested) ... �[32mok�[0m


TracebackTests.test_broken_from) ... �[32mok�[0m


TracebackTests.test_unencodable_filename) ... �[32mok�[0m


TracebackTests.test_import_bug) ... �[32mok�[0m


TracebackTests.test_nonexistent_module) ... �[32mok�[0m


Traceback (most recent call last):
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/support/__init__.py"�[0m, line �[35m3049�[0m, in �[35mwrapper�[0m
    return func(*args, **kwargs)
  File �[35m"/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/test/test_interpreters/test_api.py"�[0m, line �[35m938�[0m, in �[35mtest_display_preserved_exception�[0m
    �[31mself.assertEqual�[0m�[1;31m(stderr, dedent(f"""\�[0m
    �[31m~~~~~~~~~~~~~~~~�[0m�[1;31m^^^^^^^^^^^^^^^^^^^^^�[0m
        �[1;31mTraceback (most recent call last):�[0m
        �[1;31m^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^�[0m
    ...<18 lines>...
        �[1;31mRuntimeError: uh-oh!�[0m
        �[1;31m^^^^^^^^^^^^^^^^^^^^�[0m
        �[1;31m"""))�[0m
        �[1;31m^^^^^�[0m
�[1;35mAssertionError�[0m: �[35m'WARN: Could not find the platform standar[939 chars]h!\n' != 'Traceback (most recent call last):\n  Fil[769 chars]h!\n'
- WARN: Could not find the platform standard library directory! sys.exec_prefix is set to /buildbot/buildarea/3.x.ware-debian-x86.installed/build/target, is this correct?
  Traceback (most recent call last):
    File "/tmp/test_python_ckbktvie/tmp8u5u3u2d/script.py", line 10, in <module>
      interp.exec(script)
      ~~~~~~~~~~~^^^^^^^^
    File "/buildbot/buildarea/3.x.ware-debian-x86.installed/build/target/lib/python3.15/concurrent/interpreters/__init__.py", line 217, in exec
      raise ExecutionFailed(excinfo)
  concurrent.interpreters.ExecutionFailed: RuntimeError: uh-oh!
  
  Uncaught in the interpreter:
  
  Traceback (most recent call last):
    File "/tmp/test_python_ckbktvie/tmp8u5u3u2d/script.py", line 6, in script
      spam.eggs()
      ~~~~~~~~~^^
    File "/tmp/test_python_ckbktvie/tmp8u5u3u2d/spam.py", line 6, in eggs
      ham()
      ~~~^^
    File "/tmp/test_python_ckbktvie/tmp8u5u3u2d/spam.py", line 3, in ham
      raise RuntimeError('uh-oh!')
  RuntimeError: uh-oh!
�[0m

FFY00 · 2026-03-02T20:27:01Z

GH-145442 should fix the buildbot failure.

pythonGH-145273: warn when we can't find the standard library

08846b2

Signed-off-by: Filipe Laíns <lains@riseup.net>

bedevere-app bot added the awaiting core review label Feb 26, 2026

bedevere-app bot mentioned this pull request Feb 26, 2026

Issue warning when the we can't find a valid standard library during path initialization #145273

Open

FFY00 mentioned this pull request Feb 26, 2026

GH-145278: freeze encodings (partially) and linecache #145279

Open

Fix test_embed

d38285d

Signed-off-by: Filipe Laíns <lains@riseup.net>

FFY00 commented Feb 26, 2026

View reviewed changes

FFY00 added 2 commits February 26, 2026 23:46

Create stdlib dir on test_init_pybuilddir{,_win32}

c55803d

Signed-off-by: Filipe Laíns <lains@riseup.net>

Resolve symlinks before file check (needed for Windows)

3a67467

Signed-off-by: Filipe Laíns <lains@riseup.net>

FFY00 added 2 commits February 27, 2026 00:29

Revert "Resolve symlinks before file check (needed for Windows)"

aa6014a

This reverts commit 3a67467. Signed-off-by: Filipe Laíns <lains@riseup.net>

Fix test.support.PythonSymlink on Windows source builds

540d965

Signed-off-by: Filipe Laíns <lains@riseup.net>

Fix test_embed by creating expected paths instead of ignoring stderr

9cb1166

Signed-off-by: Filipe Laíns <lains@riseup.net>

This comment was marked as spam.

Sign in to view

FFY00 added 5 commits February 28, 2026 18:52

Don't blindly create paths

d8b5280

Signed-off-by: Filipe Laíns <lains@riseup.net>

Fix test_init_is_python_build_with_home

36e43a7

Signed-off-by: Filipe Laíns <lains@riseup.net>

Fix test_init_setpythonhome

8d63f14

Signed-off-by: Filipe Laíns <lains@riseup.net>

Don't create VPATH subdirs

e69cddb

Signed-off-by: Filipe Laíns <lains@riseup.net>

Create stdlibdir in test_init_pybuilddir_win32

460501d

Signed-off-by: Filipe Laíns <lains@riseup.net>

FFY00 enabled auto-merge (squash) March 2, 2026 18:36

FFY00 merged commit 3ab39d2 into python:main Mar 2, 2026
47 checks passed

bedevere-app bot removed the awaiting core review label Mar 2, 2026

FFY00 mentioned this pull request Mar 2, 2026

GH-145275: add -X pathconfig_warnings and PYTHON_PATHCONFIG_WARNINGS #145277

Merged

FFY00 added a commit to FFY00/cpython that referenced this pull request Mar 2, 2026

pythonGH-145274: drop build_prefix check from missing stdlib warning

2ace5d3

Signed-off-by: Filipe Laíns <lains@riseup.net>

	elif (not platstdlib_dir and not build_prefix) or not isdir(platstdlib_dir):
	elif not platstdlib_dir or not isdir(platstdlib_dir):

Uh oh!

Conversation

FFY00 commented Feb 26, 2026 • edited by bedevere-app bot Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

FFY00 commented Feb 26, 2026

Uh oh!

FFY00 Feb 26, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Choose a reason for hiding this comment

Uh oh!

FFY00 commented Feb 27, 2026

Uh oh!

FFY00 commented Feb 27, 2026

Uh oh!

FFY00 commented Feb 27, 2026

Uh oh!

This comment was marked as spam.

Uh oh!

FFY00 commented Mar 2, 2026

Uh oh!

FFY00 commented Mar 2, 2026

Uh oh!

Uh oh!

bedevere-bot commented Mar 2, 2026

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Uh oh!

FFY00 commented Mar 2, 2026

Uh oh!

bedevere-bot commented Mar 2, 2026

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Uh oh!

FFY00 commented Mar 2, 2026

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

3 participants

FFY00 commented Feb 26, 2026 •

edited by bedevere-app bot

Loading

FFY00 Feb 26, 2026 •

edited

Loading