Dennis Sweeney <sweeney.dennis...@gmail.com> added the comment:
Bisected to here:
13bc13960cc83dbd1cb5701d9a59ac9b9144b205 is the first bad commit
commit 13bc13960cc83dbd1cb5701d9a59ac9b9144b205
Author: Mark Shannon <m...@hotpy.org>
Date: Thu Jan 23 09:25:17 2020 +0000
bpo-39320: Handle unpacking of *values in compiler (GH-17984)
* Add three new bytecodes: LIST_TO_TUPLE, LIST_EXTEND, SET_UPDATE. Use them
to implement star unpacking expressions.
* Remove four bytecodes BUILD_LIST_UNPACK, BUILD_TUPLE_UNPACK,
BUILD_SET_UNPACK and BUILD_TUPLE_UNPACK_WITH_CALL opcodes as they are now
unused.
* Update magic number and dis.rst for new bytecodes.
In debug mode, the following code gives fails a C-level assertion:
d = {'metaclass': type}
for _ in [1]:
class A(1, 2, 3, **d):
pass
Assertion failed: b->b_startdepth < 0 || b->b_startdepth == depth, file
compile.c, line 6959
----------
nosy: +Dennis Sweeney, Mark.Shannon
title: Incorrect bytecpde compilation for class -> `class A(1, 2, 3, **d):
pass` gives bad bytecode
type: compile error -> crash
versions: +Python 3.10, Python 3.11, Python 3.9
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<https://bugs.python.org/issue46161>
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