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

static method f(dynamic x) → dynamic
  return block {
    core::int #t1;
    final synthesized dynamic #0#0 = x;
    #L1:
    {
      {
        if(true) {
          #t1 = 0;
          break #L1;
        }
      }
      throw new _in::ReachabilityError::•("`null` encountered as case in a switch expression with a non-nullable type.");
    }
  } =>#t1;