anchor.diff:  // Check an instance method colliding with a static setter.
   extension E14 on int {
     int method() => 0;
  +  //  ^
  +  // [cfe] Conflicts with setter 'method'.
     static void set method(int value) {}
     //              ^^^^^^
     // [analyzer] COMPILE_TIME_ERROR.EXTENSION_CONFLICTING_STATIC_AND_INSTANCE
  -  // [cfe] unspecified
  +  // [cfe] Conflicts with member 'method'.
   }
   
   // Check an instance method colliding with a static field.
  
positive.code:   static int get property2 => 1;
    //             ^^^^^^^^^
    // [analyzer] COMPILE_TIME_ERROR.EXTENSION_CONFLICTING_STATIC_AND_INSTANCE
    static void set property3(int x) {}
    //              ^^^^^^^^^
    // [analyzer] COMPILE_TIME_ERROR.EXTENSION_CONFLICTING_STATIC_AND_INSTANCE
    static int field = 3;
    //         ^^^^^
    // [analyzer] COMPILE_TIME_ERROR.EXTENSION_CONFLICTING_STATIC_AND_INSTANCE
  
negative.code:   static int method() => 0;
    //         ^^^^^^
    // [analyzer] COMPILE_TIME_ERROR.EXTENSION_CONFLICTING_STATIC_AND_INSTANCE
    // [cfe] Conflicts with setter 'method'.
    void set method(int value) {}
    //       ^
    // [cfe] Conflicts with member 'method'.
  }
  
  // Check an instance method colliding with a static getter.
  