tests/cases/conformance/es6/for-ofStatements/for-of39.ts(1,19): error TS2345: Argument of type '([string, number] | [string, true])[]' is not assignable to parameter of type 'ReadonlyArray<[string, boolean]>'.
  Types of property 'concat' are incompatible.
    Type '{ (...items: ConcatArray<[string, number] | [string, true]>[]): ([string, number] | [string, true])[]; (...items: ([string, number] | [string, true] | ConcatArray<[string, number] | [string, true]>)[]): ([string, number] | [string, true])[]; }' is not assignable to type '{ (...items: ConcatArray<[string, boolean]>[]): [string, boolean][]; (...items: ([string, boolean] | ConcatArray<[string, boolean]>)[]): [string, boolean][]; }'.
      Types of parameters 'items' and 'items' are incompatible.
        Type 'ConcatArray<[string, boolean]>' is not assignable to type 'ConcatArray<[string, number] | [string, true]>'.
          Type '[string, boolean]' is not assignable to type '[string, number] | [string, true]'.
            Type '[string, boolean]' is not assignable to type '[string, number]'.
              Type 'boolean' is not assignable to type 'number'.


==== tests/cases/conformance/es6/for-ofStatements/for-of39.ts (1 errors) ====
    var map = new Map([["", true], ["", 0]]);
                      ~~~~~~~~~~~~~~~~~~~~~
!!! error TS2345: Argument of type '([string, number] | [string, true])[]' is not assignable to parameter of type 'ReadonlyArray<[string, boolean]>'.
!!! error TS2345:   Types of property 'concat' are incompatible.
!!! error TS2345:     Type '{ (...items: ConcatArray<[string, number] | [string, true]>[]): ([string, number] | [string, true])[]; (...items: ([string, number] | [string, true] | ConcatArray<[string, number] | [string, true]>)[]): ([string, number] | [string, true])[]; }' is not assignable to type '{ (...items: ConcatArray<[string, boolean]>[]): [string, boolean][]; (...items: ([string, boolean] | ConcatArray<[string, boolean]>)[]): [string, boolean][]; }'.
!!! error TS2345:       Types of parameters 'items' and 'items' are incompatible.
!!! error TS2345:         Type 'ConcatArray<[string, boolean]>' is not assignable to type 'ConcatArray<[string, number] | [string, true]>'.
!!! error TS2345:           Type '[string, boolean]' is not assignable to type '[string, number] | [string, true]'.
!!! error TS2345:             Type '[string, boolean]' is not assignable to type '[string, number]'.
!!! error TS2345:               Type 'boolean' is not assignable to type 'number'.
    for (var [k, v] of map) {
        k;
        v;
    }