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GH-106008: Fix refleak when peepholing None comparisons (#106367)

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Brandt Bucher 2023-07-04 03:03:57 -07:00 • committed by GitHub
parent c9ce983ae1
commit e4ba71fe4b
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2 changed files with 3 additions and 1 deletions
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2
Misc/NEWS.d/next/Core and Builtins/2023-07-03-11-38-43.gh-issue-106008.HDf1zd.rst Normal file
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@ -0,0 +1,2 @@
Fix possible reference leaks when failing to optimize comparisons with
:const:`None` in the bytecode compiler.

2
Python/flowgraph.c
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@ -1377,9 +1377,9 @@ optimize_basic_block(PyObject *const_cache, basicblock *bb, PyObject *consts)
goto error; goto error;
} }
if (!Py_IsNone(cnt)) { if (!Py_IsNone(cnt)) {
Py_DECREF(cnt);
break; break;
} }
Py_DECREF(cnt);
if (bb->b_iused <= i + 2) { if (bb->b_iused <= i + 2) {
break; break;
} }