Hojun-Cho
430c7e0546
installparams normalizes a decl's `T...` param lhs to []T in place (cstage instead sets the resolved tp->type and never mutates AST), so typeeqast compared a decl-synthesized fn type's []i64 against a fn TYPE expr's surface i64 and confidently rejected `let f: fn(args: i64...) void = sum;` — cstage accepts and runs. The normalization wrapper now carries an op marker and typeeqast peels exactly it, so both sides compare at the declared element type without admitting genuinely different element depths. Fixture fnptrlet_variadic; corpus pin 1486/2972.