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GH-145278: freeze encodings (partially) and linecache#148347

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FFY00 merged 1 commit intopython:mainfrom
FFY00:freeze-startup-modules
Apr 14, 2026
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GH-145278: freeze encodings (partially) and linecache#148347
FFY00 merged 1 commit intopython:mainfrom
FFY00:freeze-startup-modules

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@FFY00 FFY00 commented Apr 10, 2026 •
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pythonGH-145278: freeze encodings (partially) and linecache
719d17d 
Signed-off-by: Filipe Laíns <lains@riseup.net>
@bedevere-app bedevere-app bot mentioned this pull request Apr 10, 2026
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@FFY00 FFY00 added 🔨 test-with-buildbots Test PR w/ buildbots; report in status section and removed awaiting core review labels Apr 10, 2026
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bedevere-bot commented Apr 10, 2026

🤖 New build scheduled with the buildbot fleet by @FFY00 for commit 719d17d 🤖

Results will be shown at:

https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F148347%2Fmerge

If you want to schedule another build, you need to add the 🔨 test-with-buildbots label again.

@bedevere-bot bedevere-bot removed the 🔨 test-with-buildbots Test PR w/ buildbots; report in status section label Apr 10, 2026
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FFY00 commented Apr 14, 2026

The raspbian buildbot failure is weird. Grasping straws, the only possible connection I can see is this PR touching the IO initialization.

Per previous Windows failure, it seems that when executing the encodings module, before it is finalized, trying to import a non-frozen submodule can cause failures. I don't see anything missing, but if the buildbot failure is indeed connected, my best guess is that this situation happens under the buildbot environment.

Since I cannot identify an actual connection here, I am gonna go ahead and merge, keeping an eye on the bug reports.

@FFY00 FFY00 merged commit 0012686 into python:main Apr 14, 2026
131 of 134 checks passed
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bedevere-bot commented Apr 14, 2026

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot ARM Raspbian 3.x (tier-3) has failed when building commit 0012686.

What do you need to do:

  1. Don't panic.
  2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
  3. Go to the page of the buildbot that failed (https://buildbot.python.org/#/builders/424/builds/13416) and take a look at the build logs.
  4. Check if the failure is related to this commit (0012686) or if it is a false positive.
  5. 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/424/builds/13416

Failed tests:

  • test.test_io.test_fileio

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

==

Click to see traceback logs 
Traceback (most recent call last):
  File "/var/lib/buildbot/workers/3.x.gps-raspbian.nondebug/build/Lib/test/test_io/test_fileio.py", line 406, in check_readall
    self.assertIn(
    ~~~~~~~~~~~~~^
        fd_str,
        ^^^^^^^
        ev.args,
        ^^^^^^^^
        f"Looking for file descriptor in arguments|ev={ev}"
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
AssertionError: '3' not found in ['NULL', '135168', 'PROT_READ|PROT_WRITE', 'MAP_PRIVATE|MAP_ANONYMOUS', '-1', '0'] : Looking for file descriptor in arguments|ev=StraceEvent(syscall='mmap2', args=['NULL', '135168', 'PROT_READ|PROT_WRITE', 'MAP_PRIVATE|MAP_ANONYMOUS', '-1', '0'], returncode='0xf7490000')


Traceback (most recent call last):
  File "/var/lib/buildbot/workers/3.x.gps-raspbian.nondebug/build/Lib/test/test_io/test_fileio.py", line 406, in check_readall
    self.assertIn(
    ~~~~~~~~~~~~~^
        fd_str,
        ^^^^^^^
        ev.args,
        ^^^^^^^^
        f"Looking for file descriptor in arguments|ev={ev}"
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
AssertionError: '3' not found in ['NULL', '135168', 'PROT_READ|PROT_WRITE', 'MAP_PRIVATE|MAP_ANONYMOUS', '-1', '0'] : Looking for file descriptor in arguments|ev=StraceEvent(syscall='mmap2', args=['NULL', '135168', 'PROT_READ|PROT_WRITE', 'MAP_PRIVATE|MAP_ANONYMOUS', '-1', '0'], returncode='0xf7776000')


Traceback (most recent call last):
  File "/var/lib/buildbot/workers/3.x.gps-raspbian.nondebug/build/Lib/test/test_io/test_fileio.py", line 406, in check_readall
    self.assertIn(
    ~~~~~~~~~~~~~^
        fd_str,
        ^^^^^^^
        ev.args,
        ^^^^^^^^
        f"Looking for file descriptor in arguments|ev={ev}"
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
AssertionError: '3' not found in ['NULL', '135168', 'PROT_READ|PROT_WRITE', 'MAP_PRIVATE|MAP_ANONYMOUS', '-1', '0'] : Looking for file descriptor in arguments|ev=StraceEvent(syscall='mmap2', args=['NULL', '135168', 'PROT_READ|PROT_WRITE', 'MAP_PRIVATE|MAP_ANONYMOUS', '-1', '0'], returncode='0xf78a2000')


Traceback (most recent call last):
  File "/var/lib/buildbot/workers/3.x.gps-raspbian.nondebug/build/Lib/test/test_io/test_fileio.py", line 406, in check_readall
    self.assertIn(
    ~~~~~~~~~~~~~^
        fd_str,
        ^^^^^^^
        ev.args,
        ^^^^^^^^
        f"Looking for file descriptor in arguments|ev={ev}"
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
AssertionError: '3' not found in ['NULL', '135168', 'PROT_READ|PROT_WRITE', 'MAP_PRIVATE|MAP_ANONYMOUS', '-1', '0'] : Looking for file descriptor in arguments|ev=StraceEvent(syscall='mmap2', args=['NULL', '135168', 'PROT_READ|PROT_WRITE', 'MAP_PRIVATE|MAP_ANONYMOUS', '-1', '0'], returncode='0xf769e000')


Traceback (most recent call last):
  File "/var/lib/buildbot/workers/3.x.gps-raspbian.nondebug/build/Lib/test/test_io/test_fileio.py", line 406, in check_readall
    self.assertIn(
    ~~~~~~~~~~~~~^
        fd_str,
        ^^^^^^^
        ev.args,
        ^^^^^^^^
        f"Looking for file descriptor in arguments|ev={ev}"
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
AssertionError: '3' not found in ['NULL', '135168', 'PROT_READ|PROT_WRITE', 'MAP_PRIVATE|MAP_ANONYMOUS', '-1', '0'] : Looking for file descriptor in arguments|ev=StraceEvent(syscall='mmap2', args=['NULL', '135168', 'PROT_READ|PROT_WRITE', 'MAP_PRIVATE|MAP_ANONYMOUS', '-1', '0'], returncode='0xf77f6000')


Traceback (most recent call last):
  File "/var/lib/buildbot/workers/3.x.gps-raspbian.nondebug/build/Lib/test/test_io/test_fileio.py", line 406, in check_readall
    self.assertIn(
    ~~~~~~~~~~~~~^
        fd_str,
        ^^^^^^^
        ev.args,
        ^^^^^^^^
        f"Looking for file descriptor in arguments|ev={ev}"
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
AssertionError: '3' not found in ['NULL', '135168', 'PROT_READ|PROT_WRITE', 'MAP_PRIVATE|MAP_ANONYMOUS', '-1', '0'] : Looking for file descriptor in arguments|ev=StraceEvent(syscall='mmap2', args=['NULL', '135168', 'PROT_READ|PROT_WRITE', 'MAP_PRIVATE|MAP_ANONYMOUS', '-1', '0'], returncode='0xf7b30000')


Traceback (most recent call last):
  File "/var/lib/buildbot/workers/3.x.gps-raspbian.nondebug/build/Lib/test/test_io/test_fileio.py", line 406, in check_readall
    self.assertIn(
    ~~~~~~~~~~~~~^
        fd_str,
        ^^^^^^^
        ev.args,
        ^^^^^^^^
        f"Looking for file descriptor in arguments|ev={ev}"
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
AssertionError: '3' not found in ['NULL', '135168', 'PROT_READ|PROT_WRITE', 'MAP_PRIVATE|MAP_ANONYMOUS', '-1', '0'] : Looking for file descriptor in arguments|ev=StraceEvent(syscall='mmap2', args=['NULL', '135168', 'PROT_READ|PROT_WRITE', 'MAP_PRIVATE|MAP_ANONYMOUS', '-1', '0'], returncode='0xf76b0000')


Traceback (most recent call last):
  File "/var/lib/buildbot/workers/3.x.gps-raspbian.nondebug/build/Lib/test/test_io/test_fileio.py", line 406, in check_readall
    self.assertIn(
    ~~~~~~~~~~~~~^
        fd_str,
        ^^^^^^^
        ev.args,
        ^^^^^^^^
        f"Looking for file descriptor in arguments|ev={ev}"
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
AssertionError: '3' not found in ['NULL', '135168', 'PROT_READ|PROT_WRITE', 'MAP_PRIVATE|MAP_ANONYMOUS', '-1', '0'] : Looking for file descriptor in arguments|ev=StraceEvent(syscall='mmap2', args=['NULL', '135168', 'PROT_READ|PROT_WRITE', 'MAP_PRIVATE|MAP_ANONYMOUS', '-1', '0'], returncode='0xf79b0000')


Traceback (most recent call last):
  File "/var/lib/buildbot/workers/3.x.gps-raspbian.nondebug/build/Lib/test/test_io/test_fileio.py", line 406, in check_readall
    self.assertIn(
    ~~~~~~~~~~~~~^
        fd_str,
        ^^^^^^^
        ev.args,
        ^^^^^^^^
        f"Looking for file descriptor in arguments|ev={ev}"
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
AssertionError: '3' not found in ['NULL', '135168', 'PROT_READ|PROT_WRITE', 'MAP_PRIVATE|MAP_ANONYMOUS', '-1', '0'] : Looking for file descriptor in arguments|ev=StraceEvent(syscall='mmap2', args=['NULL', '135168', 'PROT_READ|PROT_WRITE', 'MAP_PRIVATE|MAP_ANONYMOUS', '-1', '0'], returncode='0xf74ca000')


Traceback (most recent call last):
  File "/var/lib/buildbot/workers/3.x.gps-raspbian.nondebug/build/Lib/test/test_io/test_fileio.py", line 406, in check_readall
    self.assertIn(
    ~~~~~~~~~~~~~^
        fd_str,
        ^^^^^^^
        ev.args,
        ^^^^^^^^
        f"Looking for file descriptor in arguments|ev={ev}"
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
AssertionError: '3' not found in ['NULL', '135168', 'PROT_READ|PROT_WRITE', 'MAP_PRIVATE|MAP_ANONYMOUS', '-1', '0'] : Looking for file descriptor in arguments|ev=StraceEvent(syscall='mmap2', args=['NULL', '135168', 'PROT_READ|PROT_WRITE', 'MAP_PRIVATE|MAP_ANONYMOUS', '-1', '0'], returncode='0xf7ae0000')


Traceback (most recent call last):
  File "/var/lib/buildbot/workers/3.x.gps-raspbian.nondebug/build/Lib/test/test_io/test_fileio.py", line 406, in check_readall
    self.assertIn(
    ~~~~~~~~~~~~~^
        fd_str,
        ^^^^^^^
        ev.args,
        ^^^^^^^^
        f"Looking for file descriptor in arguments|ev={ev}"
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
AssertionError: '3' not found in ['NULL', '135168', 'PROT_READ|PROT_WRITE', 'MAP_PRIVATE|MAP_ANONYMOUS', '-1', '0'] : Looking for file descriptor in arguments|ev=StraceEvent(syscall='mmap2', args=['NULL', '135168', 'PROT_READ|PROT_WRITE', 'MAP_PRIVATE|MAP_ANONYMOUS', '-1', '0'], returncode='0xf76ea000')


Traceback (most recent call last):
  File "/var/lib/buildbot/workers/3.x.gps-raspbian.nondebug/build/Lib/test/test_io/test_fileio.py", line 406, in check_readall
    self.assertIn(
    ~~~~~~~~~~~~~^
        fd_str,
        ^^^^^^^
        ev.args,
        ^^^^^^^^
        f"Looking for file descriptor in arguments|ev={ev}"
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
AssertionError: '3' not found in ['NULL', '135168', 'PROT_READ|PROT_WRITE', 'MAP_PRIVATE|MAP_ANONYMOUS', '-1', '0'] : Looking for file descriptor in arguments|ev=StraceEvent(syscall='mmap2', args=['NULL', '135168', 'PROT_READ|PROT_WRITE', 'MAP_PRIVATE|MAP_ANONYMOUS', '-1', '0'], returncode='0xf7a96000')

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