# Bug report ### Bug description: The code in `cpython/Include/internal/pycore_optimizer.h` causing problems ```C typedef struct { uint8_t tag; bool not; uint16_t value; } JitOptTruthiness; ``` - PR which created the issue: #130659 ### CPython versions tested on: 3.14 ### Operating systems tested on: macOS <!-- gh-linked-prs --> ### Linked PRs * gh-131334 <!-- /gh-linked-prs -->