// A reserved/builtin type name is rejected as a binding name inside an `impl`
// block's method too — both as a parameter (`u8`) and as a local (`s2`). The
// impl method is reached through the exhaustive binding-name walk's
// `impl_block` arm (→ each method's `fn_decl`), so an `impl` method is no more
// exempt than a free function. Without the diagnostic the reserved local's
// `@s2` mis-lowers (a loaded aggregate passed by value to a `*Box` param →
// LLVM verifier abort).
//
// Regression (issue 0076, attempt-4 coverage). Expected: one error for the
// param and one for the local; exit 1.
#import "modules/std.sx";

Box :: struct { total: s64 = 0; count: s64 = 0; }
update :: (self: *Box, n: s64) { self.total += n; self.count += 1; }

Doer :: protocol { go :: (self: *Self, n: s64); }

impl Doer for Box {
    go :: (self: *Box, u8: s64) {
        s2 := Box.{ total = 1 };
        update(@s2, u8);
        self.total += s2.total;
    }
}

main :: () -> s32 {
    b := Box.{};
    b.go(7);
    return 0;
}