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1. mhsmith

   added

   type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

   on Apr 13, 2026
2. StanFromIreland

   added

   testsTests in the Lib/test dirTests in the Lib/test dir

   OS-ios

   topic-SSL

   on Apr 13, 2026
3. freakboy3742 commented on Apr 13, 2026

   

   freakboy3742

   on Apr 13, 2026

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   Not sure what is causing this - it seems to be related to the switch to testing the full XCframework in the buildbot (since we're not seeing the same failures in GitHub Actions CI, and we didn't see this failure prior to the switch). Most of the time, the same test passes on a re-run (which is the warning on the build). I'll do some poking around to see if I can reproduce the problem.
4. freakboy3742 commented on Apr 14, 2026

   

   freakboy3742

   on Apr 14, 2026

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   After investigation; the other SSL errors are expected (and are the thing being tested; the exceptions appear in the output in verbose mode.

   The error being raised appears to be part of a cluster of issues where there's already some skip handling for non-Linux platforms. When I run locally, I'm reliably hitting that skip handling (which is why the error isn't reproducible). On the buildbot, conditions are evidently slightly different, and the error being manifested is slightly different.
5. freakboy3742 commented on Apr 14, 2026

   

   freakboy3742

   on Apr 14, 2026

   Last edited by freakboy3742

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   For posterity - the full test failure is:

   ====================================================================== 
   FAIL: test_preauth_data_to_tls_server (test.test_ssl.TestPreHandshakeClose.test_preauth_data_to_tls_server) 
   ---------------------------------------------------------------------- 
   Traceback (most recent call last):
      File "/Users/buildbot/Library/Developer/CoreSimulator/Devices/4F9AFDE7-A49A-46AD-B161-FCA22E48EA55/data/Containers/Bundle/Application/65366177-2141-4935-B3D8-41FD90FA40BF/iOSTestbed.app/python/lib/python3.15/test/test_ssl.py", line 5624, in test_preauth_data_to_tls_server
           self.assertIn("before TLS handshake with data", wrap_error.args[1])     
           ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
   
   AssertionError: 'before TLS handshake with data' not found in '[SSL: RECORD_LAYER_FAILURE] record layer failure (_ssl.c:1109)' 
   ---------------------------------------------------------------------- 
   Ran 209 tests in 21.815s  FAILED (failures=1, skipped=16) test test_ssl failed
   
6. freakboy3742

   added a commit that references this issue on Apr 14, 2026

   gh-148508: Add resilience to SSL preauth tests on iOS (#148536)

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   c40e8b0
7. miss-islington

   added 2 commits that reference this issue on Apr 14, 2026

   pythongh-148508: Add resilience to SSL preauth tests on iOS (pythonGH…

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   14c530e

   pythongh-148508: Add resilience to SSL preauth tests on iOS (pythonGH…

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8. freakboy3742

   added 2 commits that reference this issue on Apr 14, 2026

   [3.13] gh-148508: Add resilience to SSL preauth tests on iOS (GH-148536…

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   ff88ee4

   [3.14] gh-148508: Add resilience to SSL preauth tests on iOS (GH-148536…

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   adb2a3a
9. freakboy3742 commented on Apr 14, 2026

   

   freakboy3742

   on Apr 14, 2026

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   Closing as this should now be addressed; we can re-open if it continues.
10. freakboy3742

    closed this as completedon Apr 14, 2026
11. ljfp

    added a commit that references this issue on Apr 25, 2026

    pythongh-148508: Add resilience to SSL preauth tests on iOS (python#1…

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    5c38bd4
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13. vstinner

    added 2 commits that reference this issue on Jun 1, 2026

    [3.15] gh-148508: Add another common pattern for iOS SSL failures to …

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    a4f3336

    [3.14] gh-148508: Add another common pattern for iOS SSL failures to …

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14. freakboy3742

    added 4 commits that reference this issue on Jun 12, 2026

    [3.11] pythongh-148508: Add resilience to SSL preauth tests on iOS (p…

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    984abd6

    [3.11] pythongh-148508: Add another common pattern for iOS SSL failur…

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    [3.12] pythongh-148508: Add resilience to SSL preauth tests on iOS (p…

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    248f24d

    [3.12] pythongh-148508: Add another common pattern for iOS SSL failur…

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15. Yhg1s

    added a commit that references this issue on Sep 30, 2026

    [3.12] gh-148508: Add another common pattern for iOS SSL failures to …

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16. pablogsal

    added 2 commits that reference this issue on Oct 1, 2026

    [3.10] gh-148508: Add another common pattern for iOS SSL failures to …

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    812b4df

    [3.11] gh-148508: Add another common pattern for iOS SSL failures to …

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17. freakboy3742

    added 4 commits that reference this issue on Oct 2, 2026

    [3.12] pythongh-148508: Add resilience to SSL preauth tests on iOS (p…

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    7e9db28

    [3.12] pythongh-148508: Add another common pattern for iOS SSL failur…

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    598a8c5

    [3.11] pythongh-148508: Add resilience to SSL preauth tests on iOS (p…

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    819bead

    [3.11] pythongh-148508: Add another common pattern for iOS SSL failur…

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    0532ef9
18. freakboy3742

    added 2 commits that reference this issue on Oct 12, 2026

    [3.12] pythongh-148508: Add resilience to SSL preauth tests on iOS (p…

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    bfe06ce

    [3.12] pythongh-148508: Add another common pattern for iOS SSL failur…

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