test_capi fails with "Maximum call stack size exceeded" on "wasm32-emscripten node (pthreads) 3.x" buildbot

[sobolevn]

Bug report

All new commits are failing buildbots:

Looks like #99895 is the cause

WASM buildbot output:

0:18:54 load avg: 7.06 [388/433/1] test_capi crashed (Exit code 7)
worker sent an error! undefined:undefined: Maximum call stack size exceeded
/opt/buildbot/bcannon-wasm/3.x.bcannon-wasm.emscripten-node-pthreads/build/build_oot/host/python.js:1
function GROWABLE_HEAP_I8(){ ... }
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
RangeError [Error]: Maximum call stack size exceeded
    at <anonymous>:wasm-function[315]:0x47738
    at <anonymous>:wasm-function[314]:0x4771b
    at <anonymous>:wasm-function[106]:0x1ccb9
    at <anonymous>:wasm-function[117]:0x1d6ba
    at <anonymous>:wasm-function[212]:0x36994
    at <anonymous>:wasm-function[206]:0x337fe
    at <anonymous>:wasm-function[203]:0x32a79
    at <anonymous>:wasm-function[202]:0x32768
    at <anonymous>:wasm-function[201]:0x32512
    at <anonymous>:wasm-function[200]:0x32151
Emitted 'error' event on process instance at:
    at emitUnhandledRejectionOrErr (internal/event_target.js:579:11)
    at MessagePort.[nodejs.internal.kHybridDispatch] (internal/event_target.js:403:9)
    at MessagePort.exports.emitMessage (internal/per_context/messageport.js:18:26)
0:18:55 load avg: 7.06 [389/433/1] test_typing passed
0:18:58 load avg: 7.29 [390/433/1] test_sndhdr passed
0:18:59 load avg: 7.29 [391/433/1] test_optparse passed
0:19:01 load avg: 7.35 [392/433/1] test_genericalias passed
0:19:03 load avg: 7.35 [393/433/1] test_netrc passed
0:19:07 load avg: 7.32 [394/433/1] test_listcomps passed
0:19:10 load avg: 7.32 [395/433/1] test_wave passed
0:19:10 load avg: 7.32 [396/433/1] test_traceback passed
0:19:14 load avg: 7.53 [397/433/1] test_strftime passed
0:19:15 load avg: 7.53 [398/433/1] test_thread passed
0:19:18 load avg: 7.73 [399/433/1] test_audit passed
0:19:19 load avg: 7.73 [400/433/1] test_nntplib passed
0:19:22 load avg: 7.83 [401/433/1] test_strtod passed
0:19:24 load avg: 7.83 [402/433/1] test_tuple passed
0:19:25 load avg: 7.83 [403/433/1] test_linecache passed
0:19:28 load avg: 8.01 [404/433/1] test_ensurepip passed
0:19:29 load avg: 8.01 [405/433/1] test_richcmp passed
0:19:31 load avg: 8.01 [406/433/1] test_baseexception passed
0:19:33 load avg: 7.93 [407/433/1] test_int_literal passed
0:19:35 load avg: 7.93 [408/433/1] test_pwd skipped
test_pwd skipped -- No module named 'pwd'
0:19:36 load avg: 7.85 [409/433/1] test_syntax passed
0:19:40 load avg: 7.85 [410/433/1] test_cgi passed
0:19:43 load avg: 7.78 [411/433/1] test_bytes passed
0:19:43 load avg: 7.78 [412/433/1] test_repl skipped
test_repl skipped -- test module requires subprocess
0:19:47 load avg: 7.96 [413/433/1] test_urllib_response passed
0:19:47 load avg: 7.96 [414/433/1] test_fractions passed
0:19:50 load avg: 7.96 [415/433/1] test_functools passed
0:19:53 load avg: 7.88 [416/433/1] test_embed skipped
test_embed skipped -- test module requires subprocess
0:19:56 load avg: 7.57 [417/433/1] test_check_c_globals skipped
test_check_c_globals skipped -- test module requires subprocess
0:19:59 load avg: 7.57 [418/433/1] test_flufl passed
0:20:02 load avg: 7.53 [419/433/1] test_iter passed
0:20:04 load avg: 7.53 [420/433/1] test_augassign passed
0:20:07 load avg: 7.48 [421/433/1] test_grammar passed
0:20:10 load avg: 7.48 [422/433/1] test__osx_support passed
0:20:14 load avg: 7.45 [423/433/1] test_gc passed
0:20:17 load avg: 7.41 [424/433/1] test_tkinter skipped -- running: test_tokenize (30.2 sec)
test_tkinter skipped -- No module named '_tkinter'
0:20:20 load avg: 7.41 [425/433/1] test_pty skipped -- running: test_tokenize (33.0 sec)
test_pty skipped -- No module named 'fcntl'
0:20:30 load avg: 7.11 [426/433/1] test_buffer passed -- running: test_tokenize (42.7 sec)
0:20:32 load avg: 7.10 [427/433/1] test__locale passed -- running: test_tokenize (45.4 sec)
0:20:35 load avg: 7.10 [428/433/1] test_launcher skipped -- running: test_tokenize (48.1 sec)
test_launcher skipped -- test only applies to Windows
0:20:39 load avg: 7.09 [429/433/1] test_unicode_file_functions passed -- running: test_tokenize (51.6 sec)
0:20:41 load avg: 6.84 [430/433/1] test_eof passed -- running: test_tokenize (54.4 sec)
0:20:44 load avg: 6.84 [431/433/1] test_smtpnet skipped -- running: test_tokenize (57.1 sec)
test_smtpnet skipped -- No module named '_ssl'
0:20:47 load avg: 6.85 [432/433/1] test_slice passed -- running: test_tokenize (1 min)
0:20:50 load avg: 6.85 [433/433/1] test_tokenize passed (58.6 sec)
== Tests result: FAILURE ==
338 tests OK.
10 slowest tests:
- test_tokenize: 58.6 sec
- test_unparse: 51.9 sec
- test_lib2to3: 50.1 sec
- test_io: 27.6 sec
- test_unicodedata: 21.8 sec
- test_pickle: 17.0 sec
- test_statistics: 16.9 sec
- test_weakref: 16.8 sec
- test_zipfile: 15.6 sec
- test_decimal: 15.5 sec
1 test failed:
    test_capi

Link for the failing CI job: https://buildbot.python.org/all/#/builders/1050/builds/953/steps/10/logs/stdio

AMD64 FreeBSD Non-Debug 3.x output:

0:07:14 load avg: 1.96 Re-running test_cmd_line_script in verbose mode (matching: test_script_as_dev_fd)
test_script_as_dev_fd (test.test_cmd_line_script.CmdLineTest.test_script_as_dev_fd) ... FAIL
Stderr:
/usr/home/buildbot/python/3.x.koobs-freebsd-9e36.nondebug/build/Lib/subprocess.py:849: RuntimeWarning: pass_fds overriding close_fds.
  warnings.warn("pass_fds overriding close_fds.", RuntimeWarning)
======================================================================
FAIL: test_script_as_dev_fd (test.test_cmd_line_script.CmdLineTest.test_script_as_dev_fd)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/home/buildbot/python/3.x.koobs-freebsd-9e36.nondebug/build/Lib/test/test_cmd_line_script.py", line 766, in test_script_as_dev_fd
    self.assertEqual(out, b"12345678912345678912345\n")
AssertionError: b"/usr/home/buildbot/python/3.x.koobs-free[94 chars]ry\n" != b'12345678912345678912345\n'
Stderr:
/usr/home/buildbot/python/3.x.koobs-freebsd-9e36.nondebug/build/Lib/subprocess.py:849: RuntimeWarning: pass_fds overriding close_fds.
  warnings.warn("pass_fds overriding close_fds.", RuntimeWarning)
----------------------------------------------------------------------
Ran 1 test in 0.041s
FAILED (failures=1)
test test_cmd_line_script failed
1 test failed again:
    test_cmd_line_script

Link: https://buildbot.python.org/all/#/builders/172/builds/3230/steps/5/logs/stdio

CC @pablogsal and @vstinner

[vstinner]

For the test_cmd_line_script.test_script_as_dev_fd() failure on FreeBSD, I created issue #100005 and I proposed PR #100006 to fix it.

[vstinner]

It seems like the first WASM (wasm32-emscripten node (pthreads) 3.x) build with test_capi failure was the one testing 3c137dc