==== tests/cases/compiler/collisionThisExpressionAndAliasInGlobal.ts (1 errors) ====
    module a {
        export var b = 10;
    }
    var f = () => this;
    import _this = a; // Error
    ~~~~~~~~~~~~~~~~~
!!! collisionThisExpressionAndAliasInGlobal.ts(5,1): error TS2200: Duplicate identifier '_this'. Compiler uses variable declaration '_this' to capture 'this' reference.