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SENTINEL

shape_jit::ffi::stack_kind_code

Constant SENTINEL 

Source 
pub const SENTINEL: u8 = 255;
Expand description

Sentinel byte for uninitialized stack slots (matches JITContext::default() initialization). Reading this at a pop site is a kind-source gap per ADR-006 §2.7.7 #9 — surface, do not Bool-default.