nx_dangling_else_gate.nx

nx_dangling_else_gate.nx -- LN30 (lang.plan): AN `else` WITH NO `if` IS REFUSED, NEVER RUN. End-to-end over the PROMOTED compiler: three fixtures are assembled at runtime in /tmp/<gate>/ (never a file a source census could mistake for an organ), the compiler is forked on each with stderr captured, and the teeth read the captured bytes. fx_dangling `if c {..} else {..} else {..}` -> MUST be refused, naming the else, with where (caret), why and fix fx_chain `if {..} else if {..} else {..}` -> MUST compile (the else-if production is untouched) fx_plain `if {..} else {..}` then a second `if` -> MUST compile (an ordinary else is untouched) Why this exists (measured 2026-09-02, nx_autofix_intake_gate): a `} else { ... }` hanging after an if/else that had already closed reached the statement fallback, produced nothing, and the block after it parsed as a bare block that RAN UNCONDITIONALLY -- every admission-refused row was counted twice while the gate printed a partition that did not sum. The refusal is the LN30 contract; the two controls keep this gate from passing on a compiler that refuses every else. Byte-identity of default builds is nx_cc_equiv_gate's job, deliberately not duplicated here. nx_dangling_else_gate -- verdict in the exit code (gv_verdict) license_tier: ORIGINAL layer: lang module: nishi-core.lang.dangling_else_gate