https://github.com/python/cpython/commit/86c3316183a79867e3c666d0830f897e16f0f339
commit: 86c3316183a79867e3c666d0830f897e16f0f339
branch: main
author: Serhiy Storchaka <storch...@gmail.com>
committer: serhiy-storchaka <storch...@gmail.com>
date: 2025-07-01T20:24:04+03:00
summary:
gh-134280: Disable constant folding for ~ with a boolean argument (GH-134982)
This moves the deprecation warning from compile time to run time.
files:
A
Misc/NEWS.d/next/Core_and_Builtins/2025-05-31-19-24-54.gh-issue-134280.NDVbzY.rst
M Lib/test/test_peepholer.py
M Python/flowgraph.c
diff --git a/Lib/test/test_peepholer.py b/Lib/test/test_peepholer.py
index 3d7300e1480256..98629df457460e 100644
--- a/Lib/test/test_peepholer.py
+++ b/Lib/test/test_peepholer.py
@@ -292,6 +292,7 @@ def test_constant_folding_unaryop(self):
('---x', 'UNARY_NEGATIVE', None, False, None, None),
('~~~x', 'UNARY_INVERT', None, False, None, None),
('+++x', 'CALL_INTRINSIC_1', intrinsic_positive, False, None,
None),
+ ('~True', 'UNARY_INVERT', None, False, None, None),
]
for (
diff --git
a/Misc/NEWS.d/next/Core_and_Builtins/2025-05-31-19-24-54.gh-issue-134280.NDVbzY.rst
b/Misc/NEWS.d/next/Core_and_Builtins/2025-05-31-19-24-54.gh-issue-134280.NDVbzY.rst
new file mode 100644
index 00000000000000..f822721690975a
--- /dev/null
+++
b/Misc/NEWS.d/next/Core_and_Builtins/2025-05-31-19-24-54.gh-issue-134280.NDVbzY.rst
@@ -0,0 +1,2 @@
+Disable constant folding for ``~`` with a boolean argument.
+This moves the deprecation warning from compile time to runtime.
diff --git a/Python/flowgraph.c b/Python/flowgraph.c
index 2adc8c84d83974..1cb6f03169e3b5 100644
--- a/Python/flowgraph.c
+++ b/Python/flowgraph.c
@@ -1892,6 +1892,10 @@ eval_const_unaryop(PyObject *operand, int opcode, int
oparg)
result = PyNumber_Negative(operand);
break;
case UNARY_INVERT:
+ // XXX: This should be removed once the ~bool depreciation expires.
+ if (PyBool_Check(operand)) {
+ return NULL;
+ }
result = PyNumber_Invert(operand);
break;
case UNARY_NOT: {
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