// Errors:
//
// pkg/front_end/testcases/check_deferred_is_check.dart:9:14: Error: The type '#lib1::C' is deferred loaded via prefix 'lib' and can't be used as a type annotation.
// Try removing 'deferred' from the import of 'lib' or use a supertype of '#lib1::C' that isn't deferred.
//   print(x is lib.C);
//              ^^^^^

library;
import self as self;
import "dart:core" as core;

static method main() → dynamic {}
static method test(dynamic x) → dynamic {
  core::print(x is invalid-type);
}