René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Warnings on the current main branch","articleBody":"# Bug report\r\n\r\n\r\n### CPython versions tested on:\r\n\r\nCPython main branch\r\n\r\n### Operating systems tested on:\r\n\r\nLinux\r\n\r\n### Output from running 'python -VV' on the command line:\r\n\r\nPython 3.13.0a0 (main, Aug 28 2023, 13:54:29) [GCC 12.2.0]\r\n\r\n### A clear and concise description of the bug:\r\n\r\nWith\r\n```sh\r\n$ # Mon Aug 28 13:44:26 MSK 2023\r\n$ wget https://github.com/python/cpython/archive/refs/heads/main.zip\r\n$ unzip -x main.zip\r\n$ cd cpython-main/\r\n$ ./configure -q \u0026\u0026 make -s\r\n```\r\nBuild is successful, but I see a bunch of warnings:\r\n```\r\nIn function ‘_io_FileIO_close_impl’,\r\n    inlined from ‘_io_FileIO_close’ at ./Modules/_io/clinic/fileio.c.h:34:12:\r\n./Modules/_io/fileio.c:170:9: warning: ‘exc’ may be used uninitialized [-Wmaybe-uninitialized]\r\n  170 |         _PyErr_ChainExceptions1(exc);\r\n      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~\r\n./Modules/_io/fileio.c: In function ‘_io_FileIO_close’:\r\n./Modules/_io/fileio.c:155:15: note: ‘exc’ was declared here\r\n  155 |     PyObject *exc;\r\n      |               ^~~\r\nNote: Deepfreeze may have added some global objects,\r\n      so run 'make regen-global-objects' if necessary.\r\nIn function ‘word_to_string’,\r\n    inlined from ‘coeff_to_string’ at ./Modules/_decimal/libmpdec/io.c:410:13,\r\n    inlined from ‘_mpd_to_string’ at ./Modules/_decimal/libmpdec/io.c:611:18:\r\n./Modules/_decimal/libmpdec/io.c:348:40: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]\r\n  348 |         if (s == dot) *s++ = '.'; *s++ = '0' + (char)(x / d); x %= d\r\n      |                                   ~~~~~^~~~~~~~~~~~~~~~~~~~~\r\n./Modules/_decimal/libmpdec/io.c:359:14: note: in expansion of macro ‘EXTRACT_DIGIT’\r\n  359 |     case 15: EXTRACT_DIGIT(s, x, 100000000000000ULL, dot);\r\n      |              ^~~~~~~~~~~~~\r\n./Modules/_decimal/libmpdec/io.c:348:40: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]\r\n  348 |         if (s == dot) *s++ = '.'; *s++ = '0' + (char)(x / d); x %= d\r\n      |                                   ~~~~~^~~~~~~~~~~~~~~~~~~~~\r\n./Modules/_decimal/libmpdec/io.c:360:14: note: in expansion of macro ‘EXTRACT_DIGIT’\r\n  360 |     case 14: EXTRACT_DIGIT(s, x, 10000000000000ULL, dot);\r\n      |              ^~~~~~~~~~~~~\r\n./Modules/_decimal/libmpdec/io.c:348:40: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]\r\n  348 |         if (s == dot) *s++ = '.'; *s++ = '0' + (char)(x / d); x %= d\r\n      |                                   ~~~~~^~~~~~~~~~~~~~~~~~~~~\r\n./Modules/_decimal/libmpdec/io.c:361:14: note: in expansion of macro ‘EXTRACT_DIGIT’\r\n  361 |     case 13: EXTRACT_DIGIT(s, x, 1000000000000ULL, dot);\r\n      |              ^~~~~~~~~~~~~\r\n[...]\r\n```\r\nN.B. second type of warnings (expansions of EXTRACT_DIGIT) seems to be related to the gcc-12.  The first I've seen on the Debian Buster (with gcc-10 per default).\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-114751\n* gh-116302\n* gh-116346\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/skirpichev","@type":"Person","name":"skirpichev"},"datePublished":"2023-08-28T11:24:51.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":19},"url":"https://github.com/108562/cpython/issues/108562"}