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[3.12] gh-104955: Fix __release_buffer__ signature (GH-104956) #104973

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May 26, 2023
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[3.12] gh-104955: Fix __release_buffer__ signature (GH-104956) #104973

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5 changes: 5 additions & 0 deletions Lib/test/test_inspect.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2766,6 +2766,11 @@ class ThisWorksNow:
# Regression test for issue #20586
test_callable(_testcapi.docstring_with_signature_but_no_doc)

# Regression test for gh-104955
method = bytearray.__release_buffer__
sig = test_unbound_method(method)
self.assertEqual(list(sig.parameters), ['self', 'buffer'])

@cpython_only
@unittest.skipIf(MISSING_C_DOCSTRINGS,
"Signature information for builtins requires docstrings")
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2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Core and Builtins/2023-05-25-21-40-39.gh-issue-104955.LZx7jf.rst
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@@ -0,0 +1,2 @@
Fix signature for the new :meth:`~object.__release_buffer__` slot. Patch by Jelle
Zijlstra.
2 changes: 1 addition & 1 deletion Objects/typeobject.c
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Expand Up @@ -9428,7 +9428,7 @@ static pytype_slotdef slotdefs[] = {
"__buffer__($self, flags, /)\n--\n\n"
"Return a buffer object that exposes the underlying memory of the object."),
BUFSLOT(__release_buffer__, bf_releasebuffer, slot_bf_releasebuffer, wrap_releasebuffer,
"__release_buffer__($self, /)\n--\n\n"
"__release_buffer__($self, buffer, /)\n--\n\n"
"Release the buffer object that exposes the underlying memory of the object."),

AMSLOT(__await__, am_await, slot_am_await, wrap_unaryfunc,
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