ACTIVITY SUMMARY (2020-04-24 - 2020-05-01) Python tracker at https://bugs.python.org/ To view or respond to any of the issues listed below, click on the issue. Do NOT respond to this message. Issues counts and deltas: open 7427 (-25) closed 44793 (+118) total 52220 (+93) Open issues with patches: 2954 Issues opened (74) ================== #25597: unittest.mock does not wrap dunder methods (__getitem__ etc) https://bugs.python.org/issue25597 reopened by xtreak #29587: Generator/coroutine 'throw' discards exc_info state, which is https://bugs.python.org/issue29587 reopened by gvanrossum #37340: remove free_list for bound method objects https://bugs.python.org/issue37340 reopened by rhettinger #40246: Different error messages for same error - invalid string prefi https://bugs.python.org/issue40246 reopened by vstinner #40335: [PEP 617 new parser] Regression in multiline SyntaxError offse https://bugs.python.org/issue40335 reopened by Anthony Sottile #40379: multiprocessing's default start method of fork()-without-exec( https://bugs.python.org/issue40379 opened by itamarst #40380: OS-related test failures on Linux in Python 3.8.2 https://bugs.python.org/issue40380 opened by Steven Fleck #40381: plistlib doesn't handle poorly-formatted plists https://bugs.python.org/issue40381 opened by Clay Caviness #40382: Make 'rt' the default for open in docs https://bugs.python.org/issue40382 opened by facundobatista #40383: weakref class name are hardcoded in reprs https://bugs.python.org/issue40383 opened by OhBonsai #40384: IDLE: Wrong highlighting when \n follows def/class https://bugs.python.org/issue40384 opened by Alex-Python-Programmer #40390: Implement _xxsubinterpreters.channel_send_wait(). https://bugs.python.org/issue40390 opened by benedwards14 #40391: io.FileIO.mode doesn't comply with the docs https://bugs.python.org/issue40391 opened by mike.parker #40393: Auto-response from Python Help points to Python 2 reference https://bugs.python.org/issue40393 opened by J Arun Mani #40395: Scripts folder is Empty in python 3.8.2 for Windows 7. https://bugs.python.org/issue40395 opened by BenTen Jan #40397: Refactor typing._GenericAlias https://bugs.python.org/issue40397 opened by serhiy.storchaka #40398: get_args(Callable) fails https://bugs.python.org/issue40398 opened by serhiy.storchaka #40399: IO streams locking can be broken after fork() with threads https://bugs.python.org/issue40399 opened by Delgan #40400: Mac build-installer.py doesn't support new plist format https://bugs.python.org/issue40400 opened by h2a10 #40402: Race condition in multiprocessing/connection.py: broken handle https://bugs.python.org/issue40402 opened by maxicooper #40403: pdb does not drop into debugger upon SyntaxError caused by ast https://bugs.python.org/issue40403 opened by Kerrick Staley #40404: Python quit unexpectedly https://bugs.python.org/issue40404 opened by drliu #40405: asyncio.as_completed documentation misleading https://bugs.python.org/issue40405 opened by bar.harel #40406: MagicMock __aenter__ should be AsyncMock(return_value=MagicMoc https://bugs.python.org/issue40406 opened by graingert #40407: Zipfile couldn`t recognized character set rightly. https://bugs.python.org/issue40407 opened by 김지훈 #40408: GenericAlias does not support nested type variables https://bugs.python.org/issue40408 opened by serhiy.storchaka #40409: urllib.parse.urlsplit parses schemes that do not begin with le https://bugs.python.org/issue40409 opened by sgg #40410: test_multiprocessing_forktest_terminate() timed out after 15 m https://bugs.python.org/issue40410 opened by vstinner #40412: inittab_copy not set to NULL after free, can lead to crashes w https://bugs.python.org/issue40412 opened by indygreg #40413: Py_RunMain() crashes on subsequence call https://bugs.python.org/issue40413 opened by indygreg #40414: Incorrect mouse and keyboard mapping https://bugs.python.org/issue40414 opened by Jah-On #40416: Calling TextIOWrapper.tell() in the middle of reading a gb2312 https://bugs.python.org/issue40416 opened by rmalouf #40417: PyImport_ReloadModule emits deprecation warning https://bugs.python.org/issue40417 opened by Robert Rouhani #40418: Small Refactoring: Use bytes.hex() in secrets.token_hex() https://bugs.python.org/issue40418 opened by Dennis Sweeney #40419: timeit CLI docs still mention old power sequence https://bugs.python.org/issue40419 opened by Energya #40420: argparse choices formatter https://bugs.python.org/issue40420 opened by Leonid Ilyevsky #40421: [C API] Add getter functions for PyFrameObject and maybe move https://bugs.python.org/issue40421 opened by vstinner #40422: Light refactor: create a common _Py_closerange API https://bugs.python.org/issue40422 opened by kevans91 #40423: Optimization: use close_range(2) if available https://bugs.python.org/issue40423 opened by kevans91 #40424: AIX: parallel build and ld WARNINGS https://bugs.python.org/issue40424 opened by Michael.Felt #40425: Refleak in CDataObject https://bugs.python.org/issue40425 opened by cubinator #40426: Unable to use lowercase hexadecimal digits for percent encodin https://bugs.python.org/issue40426 opened by e-kwsm #40429: [C API] PyThreadState_GetFrame() and PyFrame_GetCode() should https://bugs.python.org/issue40429 opened by vstinner #40430: ast.Slice is no longer a subclass of ast.slice https://bugs.python.org/issue40430 opened by Anthony Sottile #40433: Equality operations between lists and arrays https://bugs.python.org/issue40433 opened by Ahmed Amr #40434: Update of reasoning why there is no case statement https://bugs.python.org/issue40434 opened by amaajemyfren #40435: IDLE should catch user config file UnicodeDecodeError https://bugs.python.org/issue40435 opened by 左迟 #40439: Error in an external reference https://bugs.python.org/issue40439 opened by audpa31 #40440: allow array.array construction from memoryview w/o copy https://bugs.python.org/issue40440 opened by bjkeen #40442: Spurious warning emitted during fork() can deadlock a multi-th https://bugs.python.org/issue40442 opened by rojer #40444: multiprocessing.Pool deadlocks with only print statements https://bugs.python.org/issue40444 opened by DarinTay #40445: compileall.compile_dir docs aren't updated for bpo-38112 https://bugs.python.org/issue40445 opened by hauntsaninja #40447: compile_file's stripdir does not accept pathlib.Path https://bugs.python.org/issue40447 opened by hauntsaninja #40448: ensurepip uses cache directory https://bugs.python.org/issue40448 opened by kkonopko #40449: multi-line f-string, syntaxerror points to wrong line https://bugs.python.org/issue40449 opened by Gerrit.Holl #40452: IDLE preserve clipboard on closure (Windows) https://bugs.python.org/issue40452 opened by epaine #40453: Add PyConfig._isolated_interpreter: isolated subinterpreters https://bugs.python.org/issue40453 opened by vstinner #40454: DEBUG kw to asyncio.run overrides DEBUG mode set elsewhere https://bugs.python.org/issue40454 opened by primal #40455: GCC 10 compiler warnings https://bugs.python.org/issue40455 opened by vstinner #40456: Complete adding silent mode for py_compile https://bugs.python.org/issue40456 opened by vstinner #40457: Python fails to compile/load _ssl module if OpenSSL is compile https://bugs.python.org/issue40457 opened by Mitch Lindgren #40458: test_attribute_name_interning crashes on APPX test https://bugs.python.org/issue40458 opened by steve.dower #40459: [easy] undefined names in platform.py https://bugs.python.org/issue40459 opened by vstinner #40460: [easy] undefined name in Lib/idlelib/zzdummy.py https://bugs.python.org/issue40460 opened by vstinner #40461: execution of file with pictures doesn't work in command --onef https://bugs.python.org/issue40461 opened by Hugo Benavides #40462: [easy] undefined name in Lib/test/mock_socket.py https://bugs.python.org/issue40462 opened by vstinner #40463: csv.reader split error https://bugs.python.org/issue40463 opened by wy7305e #40464: functools.singledispatch doesn't verify annotation is on FIRST https://bugs.python.org/issue40464 opened by Dutcho #40465: Deprecate the optional *random* argument to random.shuffle() https://bugs.python.org/issue40465 opened by rhettinger #40466: asyncio.ensure_future() breaks implicit exception chaining https://bugs.python.org/issue40466 opened by chris.jerdonek #40467: subprocess: replacement shell on windows with executable="..." https://bugs.python.org/issue40467 opened by anishathalye #40468: IDLE split "general" into two tabs https://bugs.python.org/issue40468 opened by epaine #40469: TimedRotatingFileHandler rotating on use not time https://bugs.python.org/issue40469 opened by markhallett #40470: Make inspect.signature able to parse format strings. https://bugs.python.org/issue40470 opened by Antony.Lee Most recent 15 issues with no replies (15) ========================================== #40470: Make inspect.signature able to parse format strings. https://bugs.python.org/issue40470 #40469: TimedRotatingFileHandler rotating on use not time https://bugs.python.org/issue40469 #40468: IDLE split "general" into two tabs https://bugs.python.org/issue40468 #40467: subprocess: replacement shell on windows with executable="..." https://bugs.python.org/issue40467 #40466: asyncio.ensure_future() breaks implicit exception chaining https://bugs.python.org/issue40466 #40464: functools.singledispatch doesn't verify annotation is on FIRST https://bugs.python.org/issue40464 #40461: execution of file with pictures doesn't work in command --onef https://bugs.python.org/issue40461 #40459: [easy] undefined names in platform.py https://bugs.python.org/issue40459 #40458: test_attribute_name_interning crashes on APPX test https://bugs.python.org/issue40458 #40456: Complete adding silent mode for py_compile https://bugs.python.org/issue40456 #40454: DEBUG kw to asyncio.run overrides DEBUG mode set elsewhere https://bugs.python.org/issue40454 #40452: IDLE preserve clipboard on closure (Windows) https://bugs.python.org/issue40452 #40449: multi-line f-string, syntaxerror points to wrong line https://bugs.python.org/issue40449 #40448: ensurepip uses cache directory https://bugs.python.org/issue40448 #40445: compileall.compile_dir docs aren't updated for bpo-38112 https://bugs.python.org/issue40445 Most recent 15 issues waiting for review (15) ============================================= #40462: [easy] undefined name in Lib/test/mock_socket.py https://bugs.python.org/issue40462 #40456: Complete adding silent mode for py_compile https://bugs.python.org/issue40456 #40453: Add PyConfig._isolated_interpreter: isolated subinterpreters https://bugs.python.org/issue40453 #40452: IDLE preserve clipboard on closure (Windows) https://bugs.python.org/issue40452 #40448: ensurepip uses cache directory https://bugs.python.org/issue40448 #40445: compileall.compile_dir docs aren't updated for bpo-38112 https://bugs.python.org/issue40445 #40440: allow array.array construction from memoryview w/o copy https://bugs.python.org/issue40440 #40434: Update of reasoning why there is no case statement https://bugs.python.org/issue40434 #40429: [C API] PyThreadState_GetFrame() and PyFrame_GetCode() should https://bugs.python.org/issue40429 #40426: Unable to use lowercase hexadecimal digits for percent encodin https://bugs.python.org/issue40426 #40424: AIX: parallel build and ld WARNINGS https://bugs.python.org/issue40424 #40423: Optimization: use close_range(2) if available https://bugs.python.org/issue40423 #40422: Light refactor: create a common _Py_closerange API https://bugs.python.org/issue40422 #40421: [C API] Add getter functions for PyFrameObject and maybe move https://bugs.python.org/issue40421 #40419: timeit CLI docs still mention old power sequence https://bugs.python.org/issue40419 Top 10 most discussed issues (10) ================================= #40334: PEP 617: new PEG-based parser https://bugs.python.org/issue40334 35 msgs #39995: test_concurrent_futures: ProcessPoolSpawnExecutorDeadlockTest. https://bugs.python.org/issue39995 29 msgs #40246: Different error messages for same error - invalid string prefi https://bugs.python.org/issue40246 19 msgs #29587: Generator/coroutine 'throw' discards exc_info state, which is https://bugs.python.org/issue29587 13 msgs #40360: Deprecate lib2to3 (and 2to3) for future removal https://bugs.python.org/issue40360 13 msgs #40405: asyncio.as_completed documentation misleading https://bugs.python.org/issue40405 11 msgs #40256: Python 3.8 Not Launching on Bootcamp Windows 10. https://bugs.python.org/issue40256 9 msgs #40335: [PEP 617 new parser] Regression in multiline SyntaxError offse https://bugs.python.org/issue40335 9 msgs #40217: The garbage collector doesn't take in account that objects of https://bugs.python.org/issue40217 7 msgs #40399: IO streams locking can be broken after fork() with threads https://bugs.python.org/issue40399 7 msgs Issues closed (106) =================== #8536: Support new features of ZLIB 1.2.7 https://bugs.python.org/issue8536 closed by zach.ware #12503: "with" statement error message is more confusing in Py2.7 https://bugs.python.org/issue12503 closed by zach.ware #13733: Change required to sysconfig.py for Python 2.7.2 on OS/2 https://bugs.python.org/issue13733 closed by zach.ware #14141: 2.7.2 64-bit Windows library has __impt_Py* for several symbol https://bugs.python.org/issue14141 closed by zach.ware #14418: Document differences in SocketServer between Python 2.6 and 2. https://bugs.python.org/issue14418 closed by zach.ware #15408: os.fork/os.popen behaviour change between 2.7 and 3.2 https://bugs.python.org/issue15408 closed by zach.ware #16058: ConfigParser no longer deepcopy compatible in 2.7 https://bugs.python.org/issue16058 closed by zach.ware #16117: python2.7.3 struct misaligned when returned https://bugs.python.org/issue16117 closed by zach.ware #16275: test_ctypes fails on Solaris 10 SPARC 2.7 (nitrogen/s10) (Sun https://bugs.python.org/issue16275 closed by zach.ware #16326: distutils build_ext fails to set library_dirs in 2.7.2 on Linu https://bugs.python.org/issue16326 closed by zach.ware #17126: test_gdb fails https://bugs.python.org/issue17126 closed by zach.ware #17268: Context managers written as C types no longer work in Python 2 https://bugs.python.org/issue17268 closed by zach.ware #17904: bytes should be listed as built-in function for 2.7 https://bugs.python.org/issue17904 closed by zach.ware #18024: dbm module fails to build on SLES11SP1 using 2.7.5 source https://bugs.python.org/issue18024 closed by zach.ware #18493: make profile-opt fails with pre-existing python2.7 in path https://bugs.python.org/issue18493 closed by zach.ware #18567: Python 2.7.5 CENTOS6 Error building dbm using bdb https://bugs.python.org/issue18567 closed by zach.ware #18936: 2.7 distutils getopt chokes on unicode option names https://bugs.python.org/issue18936 closed by zach.ware #19351: python msi installers - silent mode https://bugs.python.org/issue19351 closed by zach.ware #21614: Case sensitivity problem in multiprocessing. https://bugs.python.org/issue21614 closed by zach.ware #21615: Curses bug report for Python 2.7 and Python 3.2 https://bugs.python.org/issue21615 closed by zach.ware #22559: [2.7] Backport ssl.MemoryBIO to Python 2.7 - PEP 546 https://bugs.python.org/issue22559 closed by zach.ware #22583: C stack overflow in the Python 2.7 compiler https://bugs.python.org/issue22583 closed by zach.ware #22863: https://docs.python.org/ should make a true 2.7.8 version avai https://bugs.python.org/issue22863 closed by zach.ware #22912: urlretreive locks up in 2.7.8 https://bugs.python.org/issue22912 closed by zach.ware #23121: pip.exe breaks if python 2.7.9 is installed under c:\Program F https://bugs.python.org/issue23121 closed by zach.ware #23137: Python 2.7.9 test_gdb fails on CentOS 7 https://bugs.python.org/issue23137 closed by zach.ware #24182: test_tcl assertion failure, 2.7, Win 7 https://bugs.python.org/issue24182 closed by zach.ware #24616: 'make install' fails installation of man pages for Python 2.7. https://bugs.python.org/issue24616 closed by zach.ware #25463: 2.7.10 glibc double free detected https://bugs.python.org/issue25463 closed by zach.ware #25560: Unhandled warning in test_unicode_file https://bugs.python.org/issue25560 closed by zach.ware #25563: Windows 10: _tkinter import fails https://bugs.python.org/issue25563 closed by zach.ware #26326: Named entity "vertical line" missed in 2.7 htmlentitydefs.py https://bugs.python.org/issue26326 closed by zach.ware #26360: Deadlock in thread.join on Python 2.7/macOS https://bugs.python.org/issue26360 closed by zach.ware #26652: Cannot install Python 2.7.11 on Windows Server 2008 R2 https://bugs.python.org/issue26652 closed by zach.ware #26665: pip is not bootstrapped by default on 2.7 https://bugs.python.org/issue26665 closed by zach.ware #26697: tkFileDialog crash on askopenfilename Python 2.7 64-bit Win7 https://bugs.python.org/issue26697 closed by zach.ware #26992: 64-bit Python 2.7.11 hangs in 64-bit Windows 10 - CMD and Git https://bugs.python.org/issue26992 closed by zach.ware #27435: ctypes library loading and AIX - also for 2.7.X (and later) https://bugs.python.org/issue27435 closed by zach.ware #27540: msvcrt.ungetwch() calls _ungetch() https://bugs.python.org/issue27540 closed by zach.ware #27562: Import error encodings (Windows xp compatibility) https://bugs.python.org/issue27562 closed by zach.ware #28551: sysconfig.py wrong _PROJECT_BASE for Py2.7 Windows 64bit PC/VS https://bugs.python.org/issue28551 closed by zach.ware #29006: 2.7.13 _sqlite more prone to "database table is locked" https://bugs.python.org/issue29006 closed by zach.ware #29640: _PyThreadState_Init and fork race leads to inconsistent key li https://bugs.python.org/issue29640 closed by zach.ware #29796: [2.7] test_weakref hangs on Python 2.7 on Windows https://bugs.python.org/issue29796 closed by zach.ware #29846: ImportError: Symbol not found: __PyCodecInfo_GetIncrementalDec https://bugs.python.org/issue29846 closed by zach.ware #30725: Windows installer for 2.7.13 doesn't install pip when installi https://bugs.python.org/issue30725 closed by zach.ware #30882: Built-in list disappeared from Python 2.7 intersphinx inventor https://bugs.python.org/issue30882 closed by zach.ware #30967: Crash in PyThread_ReInitTLS() in the child process after os.fo https://bugs.python.org/issue30967 closed by zach.ware #31297: Unpickleable ModuleImportError in unittest patch not backporte https://bugs.python.org/issue31297 closed by zach.ware #31363: __PYVENV_LAUNCHER__ breaks calling another venv's interpreter https://bugs.python.org/issue31363 closed by ned.deily #31474: [2.7] Fix -Wnonnull and -Wint-in-bool-context warnings https://bugs.python.org/issue31474 closed by zach.ware #32049: 2.7.14 does not uninstall cleanly if installation was run as S https://bugs.python.org/issue32049 closed by zach.ware #32494: Use gdbm_count if possible https://bugs.python.org/issue32494 closed by pitrou #33500: Python TKinter for Mac on latest 2.7.15 still extremely slow v https://bugs.python.org/issue33500 closed by zach.ware #33586: 2.7.15 missing release notes on download page https://bugs.python.org/issue33586 closed by zach.ware #33732: Python 2.7.15: xml.sax.parse() closes file objects passed to i https://bugs.python.org/issue33732 closed by zach.ware #34283: [Windows] Python 2 mishandles console code page after setlocal https://bugs.python.org/issue34283 closed by zach.ware #34836: test_ssl.test_default_ecdh_curve needs no tls1.3 flag in 2.7, https://bugs.python.org/issue34836 closed by zach.ware #34884: Python may load incorrect libraries when embedding the macOS s https://bugs.python.org/issue34884 closed by zach.ware #35113: inspect.getsource returns incorrect source for classes when cl https://bugs.python.org/issue35113 closed by xtreak #36803: Getting a lot of runtime misaligned address error while buildi https://bugs.python.org/issue36803 closed by zach.ware #37518: Python-2.7.16 fails to build with --enable-shared https://bugs.python.org/issue37518 closed by zach.ware #38387: Document PyDoc_STRVAR and PyDoc_STR macros https://bugs.python.org/issue38387 closed by zach.ware #38601: Couldn't able to install multiple python minor version in wind https://bugs.python.org/issue38601 closed by zach.ware #38880: Subinterpreters: List interpreters associated with a channel e https://bugs.python.org/issue38880 closed by eric.snow #38959: Parboil -- OpenMP CUTCP performance regression when upgrade fr https://bugs.python.org/issue38959 closed by zach.ware #39072: Azure Pipelines: git clone failed with: OpenSSL SSL_read: Conn https://bugs.python.org/issue39072 closed by vstinner #39482: Write 2to3 fixer for collections.abc imports https://bugs.python.org/issue39482 closed by corona10 #39837: Make Azure Pipelines optional on GitHub PRs https://bugs.python.org/issue39837 closed by brett.cannon #39966: mock 3.9 bug: Wrapped objects without __bool__ raise exception https://bugs.python.org/issue39966 closed by xtreak #40149: test_threading leaked [38, 38, 38] references, sum=114 https://bugs.python.org/issue40149 closed by vstinner #40188: Azure Pipelines jobs failing randomly with: Unable to connect https://bugs.python.org/issue40188 closed by vstinner #40261: Build of Python where make is called from subprocess, within a https://bugs.python.org/issue40261 closed by ned.deily #40269: Inconsistent complex behavior with (-1j) https://bugs.python.org/issue40269 closed by mark.dickinson #40279: Documentation example of module init function lacks error hand https://bugs.python.org/issue40279 closed by scoder #40291: socket library support for CAN_J1939 https://bugs.python.org/issue40291 closed by gvanrossum #40317: inspect.getsource() examines incorrect target https://bugs.python.org/issue40317 closed by xtreak #40338: [Security] urllib and anti-slash (\) in the hostname https://bugs.python.org/issue40338 closed by vstinner #40340: Programming FAQ about "How do I convert a string to a number?" https://bugs.python.org/issue40340 closed by aeros #40346: Add random.BaseRandom to ease implementation of subclasses https://bugs.python.org/issue40346 closed by vstinner #40375: Add the UNSELECT command to imaplib https://bugs.python.org/issue40375 closed by corona10 #40377: APPDATA location in Microsoft Store version https://bugs.python.org/issue40377 closed by stephtr #40378: ast.parse fails to trigger SyntaxWarning that normal execution https://bugs.python.org/issue40378 closed by serhiy.storchaka #40385: Tools/checkpyc.py has been broken since PEP 552 https://bugs.python.org/issue40385 closed by benjamin.peterson #40386: Strange behavior during invalid import of modules without if _ https://bugs.python.org/issue40386 closed by rhettinger #40387: queue example is a sketch https://bugs.python.org/issue40387 closed by rhettinger #40388: random.choice integer overflow v3.5.2 https://bugs.python.org/issue40388 closed by mark.dickinson #40389: No straightforward way to get repr of Optional https://bugs.python.org/issue40389 closed by gvanrossum #40392: Remove deprecated _field_types in typing.NamedTuple https://bugs.python.org/issue40392 closed by xtreak #40394: difflib.SequenceMatcher.find_longest_match default arguments https://bugs.python.org/issue40394 closed by tim.peters #40396: Support GenericAlias in typing https://bugs.python.org/issue40396 closed by serhiy.storchaka #40401: pythoncore.vcxproj fails to load due to duplicated "..\Include https://bugs.python.org/issue40401 closed by zach.ware #40411: frozen collection.Counter https://bugs.python.org/issue40411 closed by rhettinger #40415: _asyncio extensions crashes if initialized multiple times in s https://bugs.python.org/issue40415 closed by indygreg #40427: importlib of module results in different id than when imported https://bugs.python.org/issue40427 closed by brett.cannon #40428: [C API] Remove PyTuple_ClearFreeList() function (move it to th https://bugs.python.org/issue40428 closed by vstinner #40431: turtledemo/__main__.py: SyntaxError: invalid string prefix els https://bugs.python.org/issue40431 closed by vstinner #40432: Pegen regenerate project for Windows not working https://bugs.python.org/issue40432 closed by pablogsal #40436: pythoninfo collect_gdb() blows up when gdb fails to run https://bugs.python.org/issue40436 closed by vstinner #40437: add string.snake function https://bugs.python.org/issue40437 closed by eric.smith #40438: Python 3.9 eval on list comprehension sometimes returns corout https://bugs.python.org/issue40438 closed by vstinner #40441: Plural typo in Design and History FAQ https://bugs.python.org/issue40441 closed by ammar2 #40443: Remove unused imports in the stdlib (April 2020 edition) https://bugs.python.org/issue40443 closed by vstinner #40446: pow(a, b, p) where b=int((p-1)/2) spits out gibbrish for big p https://bugs.python.org/issue40446 closed by ammar2 #40450: a=[1,2,3] a=a.extend([4]) after running these two lines of cod https://bugs.python.org/issue40450 closed by eric.smith #40451: Unexpected sys.getrefcount(foo) output https://bugs.python.org/issue40451 closed by eric.smith