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02f9a78a86
- scan_backtrace: do bounds math in uintptr_t space and only cast to pointer at dereference. Comparing pointers from unrelated objects (the SP value vs the linker RAM-end symbol) is technically UB in C++ even though it works on flat-address embedded targets. - crash_handler_log: clamp the snprintf return value before using it as an offset. snprintf returns < 0 on error or >= size on truncation, and feeding that straight back into pointer arithmetic is UB.
