nx_probe_castidx_live.nx

nx_probe_castidx_live.nx -- WITNESS for the paren-primary postfix chain (parse_primary TK_LPAREN). TRAP (documented 2026-08-07, fixed 2026-08-13): indexing an INLINE-CAST string literal `("lit" as *u8)[j]` compiled clean and never compared equal -- the pending `[` silently terminated the expression, the pointer landed truncated in the receiver (measured 213 = addr&0xFF), and in an if-condition the leftover `[` desynced the parser (kind=47 at expression start). REPRO (pre-fix): build+run this -> exit 1/2/3 or COMPILE-FAIL; post-fix -> builds AND exits 0. exit 0 = correct; 1 = inline-cast index disagrees with hoisted index; 2 = hoisted form wrong; 3 = if-condition shape wrong.