1export fn entry() void {
 2    const U = union(enum) { a: void };
 3    const f: U = @import("zon/simple_union.zon");
 4    _ = f;
 5}
 6
 7// error
 8// imports=zon/simple_union.zon
 9//
10// simple_union.zon:1:9: error: expected type 'void'
11// tmp.zig:3:26: note: imported here