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Title: gh-152192: Fix JUMP_BACKWARD passing a truncated oparg to the jit tracer by deadlovelll · Pull Request #152382 · python/cpython · GitHub

Open Graph Title: gh-152192: Fix JUMP_BACKWARD passing a truncated oparg to the jit tracer by deadlovelll · Pull Request #152382 · python/cpython

X Title: gh-152192: Fix JUMP_BACKWARD passing a truncated oparg to the jit tracer by deadlovelll · Pull Request #152382 · python/cpython

Description: The _JIT op used oparg as the counter in the while loop, truncating it before reaching _PyJit_TryInitializeTracing. Fixed it by using a temporary value. For more details see gh-152192

Open Graph Description: The _JIT op used oparg as the counter in the while loop, truncating it before reaching _PyJit_TryInitializeTracing. Fixed it by using a temporary value. For more details see gh-152192

X Description: The _JIT op used oparg as the counter in the while loop, truncating it before reaching _PyJit_TryInitializeTracing. Fixed it by using a temporary value. For more details see gh-152192

Opengraph URL: https://github.com/python/cpython/pull/152382

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a290969 gh-152192: Fix JUMP_BACKWARD passing a truncated oparg to the jit tracer deadlovelll Jun 27, 2026 https://github.com/python/cpython/pull/152382/commits/a2909692ad5406a5bc41d69304d241b9b721b9bd
d1d2354 added comment note on test deadlovelll Jun 29, 2026 https://github.com/python/cpython/pull/152382/commits/d1d235444a0fa0e433fbffd2db5bc75c9cfcd70c
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