#zig build-obj {
--name test -fno-emit-bin
-Mroot=test.zig
#}

#write test.zig {
export fn entry() void {
    const a: fn () anyopaque = undefined;
    _ = a;
}
#}
#update
#check errors {
test.zig:2:20: error: opaque return type 'anyopaque' not allowed
#}
