text: //// [concatError.ts]
  
  var n1: number[];
  /*
  interface Array<T> {
      concat(...items: T[][]): T[]; // Note: This overload needs to be picked for arrays of arrays, even though both are applicable
      concat(...items: T[]): T[];
  }
  */
  var fa: number[];
  
  fa = fa.concat([0]);
  fa = fa.concat(0);
  
  
  
  
  
  /*
  
  
  
  
  declare class C<T> {
  	public m(p1: C<C<T>>): C<T>;
  	//public p: T;
  }
  
  var c: C<number>;
  var cc: C<C<number>>;
  
  c = c.m(cc);
  */
  
  //// [concatError.js]
  var n1;
  /*
  interface Array<T> {
      concat(...items: T[][]): T[]; // Note: This overload needs to be picked for arrays of arrays, even though both are applicable
      concat(...items: T[]): T[];
  }
  */
  var fa;
  fa = fa.concat([0]);
  fa = fa.concat(0);
  