René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Undefined behaviour in `main` and 3.11","articleBody":"I ran the sanitizers again, and found a few more instances of undefined behaviour, mostly around bit-shifting of signed integers and arithmetic with NULL pointers.\r\n\r\n```bash\r\nexport CC=\"clang\"\r\nexport ASAN_OPTIONS=detect_leaks=0\r\nconfigure --with-assertions --with-address-sanitizer --with-trace-refs --with-undefined-behavior-sanitizer --with-pydebug\r\nnice make -j8\r\nmake test\r\n```\r\n\r\nI put some asserts to demonstrate the undefined behaviour into pull requests for main (https://github.com/matthiasgoergens/cpython/pull/18) and 3.11 (https://github.com/matthiasgoergens/cpython/pull/19).\r\n\r\nMore information about my environment:\r\n\r\n```\r\n$ clang --version\r\nclang version 14.0.6\r\nTarget: x86_64-pc-linux-gnu\r\nThread model: posix\r\nInstalledDir: /usr/bin\r\n```","author":{"url":"https://github.com/matthiasgoergens","@type":"Person","name":"matthiasgoergens"},"datePublished":"2022-09-08T08:57:07.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":36},"url":"https://github.com/96678/cpython/issues/96678"}