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test(corral): spawn the duckdb reopen child with posix_spawn, not fork #255

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Merged
e-lo merged 1 commit into from
Oct 25, 2026
Merged

test(corral): spawn the duckdb reopen child with posix_spawn, not fork #255

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7 changes: 6 additions & 1 deletion packages/corral/tests/engines/test_ibis_engine.py
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Original file line number Diff line number Diff line change
Expand Up @@ -445,7 +445,12 @@ def test_write_duckdb_while_a_reader_holds_the_file(engine: IbisEngine, tmp_path
reader._find_backend().disconnect()
del reader
gc.collect()
reopened = subprocess.run([sys.executable, "-c", _REOPEN, str(f)], capture_output=True, text=True, check=False)
# ``close_fds=False`` (with the absolute ``sys.executable``) lets :mod:`subprocess` use ``posix_spawn`` rather
# than fork. A fork runs the worker's atfork handlers in the child, and PROJ's (loaded by the geo tests on the
# same xdist worker) closes its cached SQLite handles there, which on macOS segfaults before exec (exit -11).
reopened = subprocess.run(
[sys.executable, "-c", _REOPEN, str(f)], capture_output=True, text=True, check=False, close_fds=False
)
assert reopened.returncode == 0, reopened.stderr
assert reopened.stdout.strip() == "[('a', 1), ('b', 2)]"

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