usingDeclarations.7.ts(3,11): error TS1492: 'using' declarations may not have binding patterns.
usingDeclarations.7.ts(3,12): error TS2339: Property 'b' does not exist on type 'null'.


==== usingDeclarations.7.ts (2 errors) ====
    {
        using a = null,
              {b} = null,
              ~~~
!!! error TS1492: 'using' declarations may not have binding patterns.
               ~
!!! error TS2339: Property 'b' does not exist on type 'null'.
              c = null;
    }