gh-98433: Fix quadratic time idna decoding. (#99092)
There was an unnecessary quadratic loop in idna decoding. This restores
the behavior to linear.
This also adds an early length check in IDNA decoding to outright reject
huge inputs early on given the ultimate result is defined to be 63 or fewer
characters.
The test.support.wait_process() function now uses a timeout of
LONG_TIMEOUT seconds by default, instead of SHORT_TIMEOUT. It
doesn't matter if a Python buildbot is slower, it only matters that
the process completes. The timeout should just be shorter than
"forever".
This adds support for comparing pystats collected from two different builds.
- The `--json-output` can be used to load in a set of raw stats and output a
JSON file.
- Two of these JSON files can be provided on the next run, and then comparative
results between the two are output.
gh-90716: bugfixes and more tests for _pylong. (#99073)
* Properly decref on _pylong import error.
* Improve the error message on _pylong TypeError.
* Fix the assertion error in pydebug builds to be a TypeError.
* Tie the return value comments together.
These are minor followups to issues not caught among the reviewers on
https://github.com/python/cpython/pull/96673.
gh-73691: Increase size limits in _xxtestfuzz (#99070)
Now that our int<->str conversions are size limited and we have the
_pylong module handling larger integers, we don't need to limit
everything just to avoid wasting time in the quadratic time DoS-like
case while fuzzing.
We can tweak these further after seeing how this goes.
Victor Stinner [Thu, 3 Nov 2022 18:27:27 +0000 (19:27 +0100)]
gh-92584: Remove the distutils package (#99061)
Remove the distutils package. It was deprecated in Python 3.10 by PEP
632 "Deprecate distutils module". For projects still using distutils
and cannot be updated to something else, the setuptools project can
be installed: it still provides distutils.
* Remove Lib/distutils/ directory
* Remove test_distutils
* Remove references to distutils
* Skip test_check_c_globals and test_peg_generator since they use
distutils
Victor Stinner [Thu, 3 Nov 2022 17:32:25 +0000 (18:32 +0100)]
gh-94172: Remove keyfile, certfile and check_hostname parameters (#94173)
Remove the keyfile, certfile and check_hostname parameters,
deprecated since Python 3.6, in modules: ftplib, http.client,
imaplib, poplib and smtplib. Use the context parameter (ssl_context
in imaplib) instead.
Parameters following the removed parameters become keyword-only
parameters.
ftplib: Remove the FTP_TLS.ssl_version class attribute: use the
context parameter instead.
A backslash-character pair that is not a valid escape sequence now
generates a SyntaxWarning, instead of DeprecationWarning. For
example, re.compile("\d+\.\d+") now emits a SyntaxWarning ("\d" is an
invalid escape sequence), use raw strings for regular expression:
re.compile(r"\d+\.\d+"). In a future Python version, SyntaxError will
eventually be raised, instead of SyntaxWarning.
Octal escapes with value larger than 0o377 (ex: "\477"), deprecated
in Python 3.11, now produce a SyntaxWarning, instead of
DeprecationWarning. In a future Python version they will be
eventually a SyntaxError.
codecs.escape_decode() and codecs.unicode_escape_decode() are left
unchanged: they still emit DeprecationWarning.
* The parser only emits SyntaxWarning for Python 3.12 (feature
version), and still emits DeprecationWarning on older Python
versions.
* Fix SyntaxWarning by using raw strings in Tools/c-analyzer/ and
wasm_build.py.
This got introduced in commit 5884449539510313c826d69835829c7957c7154a
to determine if readline is already linked against curses or tinfo in
the setup.py, which is no longer present.
The function has been removed. In the ssl documentation, replace
references to the ssl.wrap_socket() function with references to the
ssl.SSLContext.wrap_socket() method.
gh-98740: Fix validation of conditional expressions in RE (GH-98764)
In very rare circumstances the JUMP opcode could be confused with the
argument of the opcode in the "then" part which doesn't end with the
JUMP opcode. This led to incorrect detection of the final JUMP opcode
and incorrect calculation of the size of the subexpression.
NOTE: Changed return value of functions _validate_inner() and
_validate_charset() in Modules/_sre/sre.c. Now they return 0 on success,
-1 on failure, and 1 if the last op is JUMP (which usually is a failure).
Previously they returned 1 on success and 0 on failure.
The switch cases (really TARGET(opcode) macros) have been moved from ceval.c to generated_cases.c.h. That file is generated from instruction definitions in bytecodes.c (which impersonates a C file so the C code it contains can be edited without custom support in e.g. VS Code).
The code generator lives in Tools/cases_generator (it has a README.md explaining how it works). The DSL used to describe the instructions is a work in progress, described in https://github.com/faster-cpython/ideas/blob/main/3.12/interpreter_definition.md.
This is surely a work-in-progress. An easy next step could be auto-generating super-instructions.
**IMPORTANT: Merge Conflicts**
If you get a merge conflict for instruction implementations in ceval.c, your best bet is to port your changes to bytecodes.c. That file looks almost the same as the original cases, except instead of `TARGET(NAME)` it uses `inst(NAME)`, and the trailing `DISPATCH()` call is omitted (the code generator adds it automatically).
Manuel Kaufmann [Tue, 1 Nov 2022 13:25:33 +0000 (14:25 +0100)]
Doc: use "unnumbered" footnotes (#98954)
Use unnumbered footnote in this file to avoid reseting the footnotes numbering.
Example: when building the tutorial into a PDF and using `latex_show_urls = "footnotes"`; this footnote become the number 8. However, without this change, the footnote shows the number 1.
gh-98852: Fix subscription of type aliases (GH-98920)
Fix subscription of type aliases containing bare generic types or types
like TypeVar: for example tuple[A, T][int] and tuple[TypeVar, T][int],
where A is a generic type, and T is a type variable.