gh-154345: Fix test_posix_pty_functions() killing the worker on Solaris (GH-154346)
Pushing the "ptem" STREAMS module makes a session leader without a
controlling terminal acquire the slave as one, so closing the file
descriptors sent SIGHUP to the session and killed the regrtest worker.
Disown it after the pushes, as os.openpty() does.
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
gh-154320: Fix swapped __defaults__/__kwdefaults__ in annotationlib docs (#154321)
The bullet list under "Creating a custom callable annotate function"
had the attribute names reversed: positional defaults are __defaults__
(a tuple) and keyword defaults are __kwdefaults__ (a dict). The example
code below was already correct.
gh-139373: Fix asyncio Process.communicate() losing output when cancelled (#154223)
Output already read when communicate() is cancelled (e.g. by a
wait_for() timeout) is now retained on the Process and returned by a
subsequent communicate() call, matching subprocess.Popen.communicate()
behaviour on timeout. Passing input to a communicate() call following a
cancelled one now raises ValueError.
gh-83273: Rewrite csv.Sniffer dialect detection using trial parsing (GH-153694)
Guess the dialect by parsing the sample with every plausible
combination of delimiter, quotechar and escapechar, using the actual
CSV parser in strict mode, and choosing the combination which splits
the sample into rows with the most consistent number of fields. The
old heuristics, which guessed the delimiter from characters adjacent
to quotes and from character frequencies, are removed.
A large sample is parsed incrementally: first only its beginning,
then, after eliminating the combinations which are clearly worse than
the leader, a several times larger part, and so on.
* csv.Sniffer can now detect escapechar='\\'.
* Explicitly requested delimiters are no longer restricted to ASCII.
* A delimiter inside a quoted field no longer wins over the actual
delimiter, and sniffing no longer takes quadratic time on quoted
samples.
* The sample can be cut off at an arbitrary point: in the middle of a
row, of a quoted field or of an escaped sequence.
* Only '\r', '\n' and '\r\n' are treated as row separators, so
characters like '\x1c' can now be detected as a delimiter.
* A preamble (title or comment lines) before the data does not prevent
detection if the data rows outnumber the preamble lines.
* A sample consisting of a single column of quoted fields now raises
csv.Error instead of guessing a delimiter from the content of the
fields, and Sniffer.has_header() no longer raises ValueError for
such samples.
* doublequote is detected by comparing the two readings of the sample.
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
gh-103925: Fix csv.Sniffer for a quoted field ending a CRLF line (GH-103926)
"$" does not match before "\r" even in the MULTILINE mode, so such a
field was not found and the delimiter was guessed from character
frequencies instead, which could give a letter.
Co-authored-by: Serhiy Storchaka <storchaka@gmail.com> Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
gh-154308: Clear file flags in os_helper.rmtree() (GH-154310)
On BSD systems a test may leave behind files or directories with flags
such as UF_IMMUTABLE or UF_NOUNLINK set, which prevent the directory from
being modified or removed. Clear the flags before removing, so cleaning
up a temporary directory does not fail.
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
gh-154307: Fix TemporaryDirectory cleanup on DragonFly BSD (GH-154309)
On DragonFly BSD, removing a file or directory with the UF_NOUNLINK flag
fails with EISDIR (IsADirectoryError) instead of EPERM, so the cleanup did
not reset the flags. Handle IsADirectoryError the same as PermissionError.
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
gh-154303: Skip test_sqlite3 CLI completion tests on OpenBSD (GH-154304)
OpenBSD's readline does not honor "completion-query-items 0", so completing
many candidates blocks on a "Display all N?" prompt that hangs the
pseudo-terminal opened by run_pty(). Skip the whole Completion class on
OpenBSD, like the existing libedit skip.
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
gh-154291: Fix socket.has_dualstack_ipv6() on DragonFly BSD (GH-154292)
On DragonFly BSD setsockopt(IPPROTO_IPV6, IPV6_V6ONLY, 0) succeeds without
actually clearing the flag, so has_dualstack_ipv6() wrongly returned True.
Verify with getsockopt() that IPV6_V6ONLY was cleared.
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
gh-154260: Fix test_flush_parameters on DragonFly BSD (GH-154261)
DragonFly, like FreeBSD, rejects mmap.flush() with MS_ASYNC|MS_INVALIDATE
(EINVAL). Use str.startswith() so the check also matches DragonFly, whose
sys.platform carries a version suffix.
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
gh-154258: Fix mmap.resize() crash on NetBSD growing a shared anonymous mapping (GH-154259)
NetBSD mremap() returns a mapping whose grown region is not backed when
growing a shared anonymous mapping, so accessing it crashes. Reject it
with ValueError, as is already done on Linux.
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
gh-154176: Fix locale.strxfrm() crash on DragonFly BSD (GH-154177)
Query the result size with a real one-element buffer instead of
wcsxfrm(NULL, s, 0): DragonFly BSD's wcsxfrm() crashes when the
destination is NULL or the size is 0.
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
gh-62534: Document that three-argument type() does not call __prepare__ (GH-154028)
The three-argument form of type() skips the metaclass __prepare__
method, which is called by the class statement machinery rather than
by the metaclass call itself. Say so in the type() entry and point to
types.new_class() for dynamic class creation with the appropriate
metaclass, as directed in the issue thread.
gh-139806: Mention pickle error changes in What's New in 3.14 (GH-154020)
The gh-122311 changes made pickle.dump() and pickle.dumps() raise
PicklingError for some failures that previously raised AttributeError,
ImportError, ValueError or UnicodeEncodeError, depending on the
implementation.
Add an entry about this in the "Porting to Python 3.14" section.
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
gh-151949: Fix Sphinx reference warnings in `Doc/library/lzma.rst` (GH-153878)
The lzma module constants (FORMAT_*, CHECK_*, PRESET_*, FILTER_*, MODE_*
and MF_*) were referenced with the :const: role throughout the module
documentation but were never defined as reference targets, producing
"reference target not found" warnings under nitpicky mode.
Document these public constants with .. data:: directives, following the
convention used by the signal, socket and ssl modules, so the existing
references resolve. The now-redundant inline descriptions of the format
and check constants are condensed into linked references.
gh-154055: Gate optional curses functions absent on old SVr4 curses (GH-154057)
Build hygiene so the curses modules build against a limited curses (e.g. the
native SVr4 curses of illumos/Solaris), matching how other optional functions
are already gated:
* Probe and #ifdef-gate the X/Open attr_t functions (window.attr_get/attr_set/
attr_on/attr_off/color_set), the soft-label attribute functions
(slk_attr_on/off/set, slk_color) and scr_set(); scr_set is probed separately
from the scr_dump family, which SVr4 has without it.
* Stop gating update_lines_cols() on resizeterm(): it only reads LINES/COLS and
is used unconditionally (e.g. by set_term()), so a build without resizeterm()
failed to link.
* On Solaris/illumos define _BOOL (and include <stdbool.h>) so the SVr4
<curses.h> "typedef char bool" does not clash with C's bool.
test.test_curses: skip or guard the tests that use the now-optional functions,
split test_attributes so its chtype-based part still runs, and treat the native
curses of NetBSD and illumos/Solaris as having broken newterm() (they crash on
repeated newterm()/delscreen(), like ncurses before 6.5).
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Victor Stinner [Sun, 19 Jul 2026 10:05:22 +0000 (12:05 +0200)]
gh-104533: Fix `@ctypes.util.struct` with string annotations (#154040)
Fix `@ctypes.util.struct` on structures declared in a module which uses
`from __future__ import annotations`. The decorator now calls
get_annotations() with eval_str=True.
gh-153906: Modernize pydoc HTML output (GH-153909)
Follow-up of the HTML5 migration in bpo-10716: replace the layout
tables, the /<br> encoding of docstrings and the obsolete
<a name=...> anchors with semantic markup (header, section, h1-h4,
CSS multi-column lists, white-space: pre-wrap, id= anchors), and
restyle the pages after the python-docs-theme used by docs.python.org,
including dark mode support. Members inherited from other classes
are now collapsed by default. The pydoc API is unchanged; obsolete
arguments of HTMLDoc methods are accepted and ignored. ServerHTMLDoc
in xmlrpc.server is updated to match.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
gh-154053: Fix compilation of the ssl module against LibreSSL (GH-154054)
LibreSSL does not provide SSL_CTX_set1_sigalgs_list() or
SSL_CTX_set1_client_sigalgs_list(), added in gh-138252, so _ssl failed to
compile against LibreSSL on 3.15+. Guard the set_server_sigalgs() and
set_client_sigalgs() methods so they raise NotImplementedError on LibreSSL,
and skip the corresponding tests.
gh-153864: Fix curses window.insch() for non-ASCII characters on a wide build (GH-153865)
On a wide build, winsch() does not locale-decode a byte above 127, unlike
waddch(), so insch() inserted '¤' (U+00A4) instead of '€' for byte 0xA4
under ISO-8859-15. Decode the byte with btowc() and insert it as a wide
character, like addch().
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
gh-153862: Fix curses window.inch() for non-ASCII characters on a wide build (GH-153863)
On a wide build, winch() returns the low 8 bits of the character's code
point with no locale conversion, so inch()/mvinch() disagreed with instr()
for a non-ASCII character of an 8-bit locale ('€' under ISO-8859-15 gave
0xAC instead of 0xA4). Re-encode the cell to its locale byte via wctob(),
as ncurses does for getbkgd().
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
gh-154048: Fix building the iconv codec on illumos/Solaris (GH-154049)
iconv()'s input-buffer argument is declared "const char **" on some systems
(illumos/Solaris, old GNU libiconv) rather than the POSIX "char **", so passing
a "char **" failed to compile. Cast it through void*, which converts to either
without a warning.
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
gh-136687: Add ./configure --with-curses to select the curses backend (GH-153992)
Add --with-curses=ncursesw|ncurses|curses|no, mirroring --with-readline.
The default (auto) keeps the current behaviour: prefer ncursesw, fall back
to ncurses. --with-curses=curses links the system's native curses (e.g. on
NetBSD or Solaris), which has no pkg-config file and was previously
unreachable; it is built with wide-character support when the library
provides it. --without-curses excludes the curses and _curses_panel modules
from the build.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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