René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"mmap.resize() can raise SystemError","articleBody":"# Bug report\n\nOn Posix platforms without mremap() (FreeBSD, OpenBSD, NetBSD, OpenIndiana) `mmap.resize()` raises SystemError.\n```\nSystemError: mmap: resizing not available--no mremap()\n```\n\nSystemError should only be raised in case of the misuse of the C API or breaking internal consistency of the Python core. It is one step away from a segmentation fault or undefined behavior. If some function cannot be implemented, it should either do not exist (causing AttributeError) or raise more appropriate exception when called, like NotImplemenedError, or OSError(ENOTSUP), or simply RuntimeError.\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-138276\n* gh-143440\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/serhiy-storchaka","@type":"Person","name":"serhiy-storchaka"},"datePublished":"2025-08-27T19:02:27.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/138205/cpython/issues/138205"}