pub fn take_panic_breadcrumb() -> Option<PanicCrumb>Expand description
Read and clear the previous run’s panic breadcrumb, if any. Call once at
boot, before install, and log the result (the markers::PREV_PANIC
line) — that read-back is the cross-transport fault contract (R8), identical
on both targets. Returns None on a clean boot or once the crumb is taken.