pkg/front_end/testcases/inference/for_loop_initializer_expression.dart:10:10: Context: Write to x@282
  for (x = 0; x /*@target=num::<*/ < 10; x /*@ target=num::+ */ ++) {
         ^
pkg/front_end/testcases/inference/for_loop_initializer_expression.dart:10:65: Context: Write to x@282
  for (x = 0; x /*@target=num::<*/ < 10; x /*@ target=num::+ */ ++) {
                                                                ^^
pkg/front_end/testcases/inference/for_loop_initializer_expression.dart:11:11: Context: Possible promotion of x@282
    if (x is int) {
          ^^