gh-106529: Fix subtle Tier 2 edge case with list iterator (#106756)
The Tier 2 opcode _IS_ITER_EXHAUSTED_LIST (and _TUPLE)
didn't set it->it_seq to NULL, causing a subtle bug
that resulted in test_exhausted_iterator in list_tests.py
to fail when running all tests with -Xuops.
The bug was introduced in gh-106696.
Added this as an explicit test.
Also fixed the dependencies for ceval.o -- it depends on executor_cases.c.h.
gh-106690: Add a .coveragerc file to the CPython repository (#8150)
The added file is the coverage default at some point in time + checking branches both ways + IDLE additions, labelled as such and somewhat designed to be unlikely to affect other files. Located in the CPython repository directory, it can be used where it is or copied elsewhere, depending on how one runs coverage.
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Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu> Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com> Co-authored-by: Erlend E. Aasland <erlend.aasland@protonmail.com>
gh-103186: In test_tools.freeze, fetch CONFIG_ARGS from original source directory (#103213)
Fetch CONFIG_ARGS from the original source directory, instead of from
the copied source tree. When "make clean" is executed in the copied
source tree, the build directory is cleared and the configure argument
lookup fails. However, the original source directory still contains this
information.
gh-106529: Support JUMP_BACKWARD in Tier 2 (uops) (#106543)
During superblock generation, a JUMP_BACKWARD instruction is translated to either a JUMP_TO_TOP micro-op (when the target of the jump is exactly the beginning of the superblock, closing the loop), or a SAVE_IP + EXIT_TRACE pair, when the jump goes elsewhere.
The new JUMP_TO_TOP instruction includes a CHECK_EVAL_BREAKER() call, so a closed loop can still be interrupted.
gh-86618 assumed a-b-c = a-(b+c) = a-d where d = b+d.
For floats 2.0, 1.0, and 0.9999999999999999, this assumption
is false. The net change of 1.1102230246251565e-16 to 0.0
results in division by 0. Revert the replacement. Add test.
Victor Stinner [Tue, 11 Jul 2023 09:38:22 +0000 (11:38 +0200)]
gh-106572: Convert PyObject_DelAttr() to a function (#106611)
* Convert PyObject_DelAttr() and PyObject_DelAttrString() macros to
functions.
* Add PyObject_DelAttr() and PyObject_DelAttrString() functions to
the stable ABI.
* Replace PyObject_SetAttr(obj, name, NULL) with
PyObject_DelAttr(obj, name).
- Hand-written uops JUMP_IF_{TRUE,FALSE}.
These peek at the top of the stack.
The jump target (in superblock space) is absolute.
- Hand-written translation for POP_JUMP_IF_{TRUE,FALSE},
assuming the jump is unlikely.
Once we implement jump-likelihood profiling,
we can implement the jump-unlikely case (in another PR).
- Tests (including some test cleanup).
- Improvements to len(ex) and ex[i] to expose the whole trace.
Louis Paulot [Mon, 10 Jul 2023 21:45:27 +0000 (23:45 +0200)]
gh-94777: Fix deadlock in ProcessPoolExecutor (#94784)
Fixes a hang in multiprocessing process pool executor when a child process crashes and code could otherwise block on writing to the pipe. See GH-94777 for more details.
gh-103186: Fix or catch 'extra' stderr output from unittests (#103196)
Reduce test noise by fixing or catching and testing stderr messages from individual tests.
test_cmd_line_script.test_script_as_dev_fd calls spawn_python and hence subprocess.Popen with incompatible arguments. On POSIX, pass_fds forces close_fds to be True (subprocess.py line 848). Correct the call.
test_uuid.test_cli_namespace_required_for_uuid3: when the namespace is omitted, uuid.main calls argparse.Argument_Parser.error, which prints to stderr before calling sys.exit, which raises SystemExit. Unittest assertRaises catches the exception but not the previous output. Catch the output and test it.
test_warnings.test_catchwarnings_with_simplefilter_error similarly prints before raising. Catch the output and test it.
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Ned Batchelder [Mon, 10 Jul 2023 03:41:31 +0000 (20:41 -0700)]
Clarify how topics.py gets created. (#106121)
When changing docs, it was easy to find text in topics.py, and I
wondered whether I was supposed to edit it. Thankfully, the top of the
file says it's auto-generated, so I knew I didn't have to edit it. But I
didn't know what started the auto-generation process.
It's part of the release process, so I'll leave a note here for future
editors.
Victor Stinner [Sat, 8 Jul 2023 15:51:45 +0000 (17:51 +0200)]
gh-106535: Soft deprecate the getopt module (#105735)
The getopt module exists since the initial revision of the Python
source code (1990). The optparse module was added to Python 2.3. When
Python 2.7 added the 3rd argparse module, the optparse module was
soft deprecated. Soft deprecate the getopt module.
gh-106524: Fix a crash in _sre.template() (GH-106525)
Some items remained uninitialized if _sre.template() was called with invalid
indices. Then attempt to clear them in the destructor led to dereferencing
of uninitialized pointer.
Restore previous behavior of 'make regen-cases' (#106541)
When running 'make regen-cases' just to check whether anything changed,
it's annoying that even if nothing changes, the output files are touched,
causing an expensiv rebuild of _bootstrap_python and anything it creates.
Victor Stinner [Fri, 7 Jul 2023 23:49:20 +0000 (01:49 +0200)]
gh-105373: Remove C API global config vars in Python 3.14 (#106538)
Schedule the removal of C API global configuration variables in
Python 3.14. Announce the removal to help C extension maintainers to
upgrade their code.