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gh-150001: fix escalation to SystemError during parsing #150067

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gh-150001: fix escalation to SystemError during parsing #150067

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b2c5aca
Make code in c_generator.py break on error
sandugood May 19, 2026
ab7ebf3
Merge remote-tracking branch 'upstream/main' into gh-150001
sandugood May 19, 2026
c9c7a05
Docstring fix on a test function
sandugood May 19, 2026
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23 changes: 23 additions & 0 deletions Lib/test/test_compile.py
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Original file line number Diff line number Diff line change
Expand Up @@ -911,6 +911,29 @@ def unused_code_at_end():
'RETURN_VALUE',
list(dis.get_instructions(unused_code_at_end))[-1].opname)

# gh-150001: Test that this code does not raise SystemError
@support.cpython_only
def test_parser_stack_overflow_no_crash(self):
string = (
b'(*h(((h(h(h(' +
b'[' * 35 +
b'*h(' +
b'[' * 38 +
b'**h(' +
b'[' * 31 +
b'(' * 4 +
b'~' * 20 +
b'F{' +
b'[' * 27 +
b'**h(' +
b'[' * 31 +
b'(' * 4 +
b'~' * 23 +
b'F{F"{F"{F"{F"{F"{F"{F"{FF""{{F"{""{F"{F{{F"{F"{F"\\}'
)
with self.assertRaises((MemoryError, SyntaxError)):
compile(string, '<input>', "single")

@support.cpython_only
def test_docstring(self):
src = textwrap.dedent("""
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