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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[3.15.0a8] Build error if specialization is disabled","articleBody":"# Bug report\n\n### Bug description:\n\nSet `ENABLE_SPECIFICATION = 0` and run `make`.\nhttps://github.com/python/cpython/blob/d206d42834b2a34aee11b048357131371cf6947d/Include/internal/pycore_code.h#L301\n\n```\nPython/specialize.c:119:31: error: use of undeclared identifier 'opcode'\n  119 |         i += _PyOpcode_Caches[opcode];\n      |                               ^\n1 error generated.\nmake: *** [Python/specialize.o] Error 1\n```\n\nThe bug was introduced in https://github.com/python/cpython/commit/879c85f6e4ca8424ff6b4fddfbc946889572bf13, released with 3.15.0a8.\n\n### CPython versions tested on:\n\nCPython main branch\n\n### Operating systems tested on:\n\nmacOS\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-148826\n* gh-152206\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/cdce8p","@type":"Person","name":"cdce8p"},"datePublished":"2026-04-21T13:06:11.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/148825/cpython/issues/148825"}