library /*isNonNullableByDefault*/;
//
// Problems in library:
//
// pkg/front_end/testcases/nnbd/nullable_rhs_of_typedef.dart:5:11: Error: Can't create typedef from nullable type.
// typedef F = void Function()?;
//           ^
//
import self as self;

typedef F = invalid-type;
static method foo(() → void x) → void {
  self::bar(x);
  self::bar(null);
  self::baz(x);
  self::baz(null);
}
static method bar(invalid-type x) → void {}
static method baz(invalid-type x) → void {}
static method main() → dynamic {}