==== tests/cases/compiler/collisionThisExpressionAndClassInGlobal.ts (1 errors) ====
    class _this {
    ~~~~~~~~~~~~~
    }
    ~
!!! collisionThisExpressionAndClassInGlobal.ts(1,1): error TS2200: Duplicate identifier '_this'. Compiler uses variable declaration '_this' to capture 'this' reference.
    var f = () => this;