Bug report

Bug description:

Currently wePy_XDECREF((PyObject *)(uintptr_t)buffer[pc].operand0); only at the last part of uop_optimize, but we don't handle any of the error cases. This means if the JIT errors, it's possible to leak memory.

@markshannon assigning this to you.

CPython versions tested on:

CPython main branch

Operating systems tested on:

No response

Linked PRs

• GH-144688: Fix refleaks in JIT when optimization fails #145420