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test_sqlite3.test_dbapi: test_deserialize_too_much_data_64bit uses undefined size (and requires 24 Exabytes of RAM) #93117

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test_sqlite3.test_dbapi: test_deserialize_too_much_data_64bit uses undefined size (and requires 24 Exabytes of RAM)#93117
#93154
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testsTests in the Lib/test dirtopic-sqlite3type-bugAn unexpected behavior, bug, or error
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@The-Compiler
The-Compiler
opened on May 23, 2022

Bug report

In a755124 (GH-26728, v3.11.0a7), @erlend-aasland added a test_deserialize_too_much_data_64bit, which would instantly raise a NameError for size if run:

cpython/Lib/test/test_sqlite3/test_dbapi.py

Lines 629 to 634 in b2694ab

@unittest.skipUnless(sys.maxsize > 2**32, 'requires 64bit platform')
@bigmemtest(size=2**63, memuse=3, dry_run=False)
def test_deserialize_too_much_data_64bit(self):
with memory_database() as cx:
with self.assertRaisesRegex(OverflowError, "'data' is too large"):
cx.deserialize(b"b" * size)

...however, it's never actually run, because it's skipped on machines with less than 24 Exabytes (!) of RAM:

test_deserialize_too_much_data_64bit (test.test_sqlite3.test_dbapi.SerializeTests.test_deserialize_too_much_data_64bit) ... skipped 'not enough memory: 25769803776.0G minimum needed'

(Found by running flake8 over Lib/ out of curiosity, see #93010 (comment))

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    testsTests in the Lib/test dirtopic-sqlite3type-bugAn unexpected behavior, bug, or error

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