==== tests/cases/compiler/collisionThisExpressionAndPropertyNameAsConstuctorParameter.ts (4 errors) ====
    class Foo2 {
        constructor(_this: number) { //Error
                    ~~~~~
!!! Duplicate identifier '_this'. Compiler uses variable declaration '_this' to capture 'this' reference.
            var lambda = () => {
                return x => this;   // New scope.  So should inject new _this capture
            }
        }
    }
    
    class Foo3 {
        constructor(private _this: number) { // Error
                            ~~~~~
!!! Duplicate identifier '_this'. Compiler uses variable declaration '_this' to capture 'this' reference.
            var lambda = () => {
                return x => this;   // New scope.  So should inject new _this capture
            }
        }
    }   
    
    class Foo4 {
        constructor(_this: number); // No code gen - no error
        constructor(_this: string); // No code gen - no error
        constructor(_this: any) { // Error
                    ~~~~~
!!! Duplicate identifier '_this'. Compiler uses variable declaration '_this' to capture 'this' reference.
            var lambda = () => {
                return x => this;   // New scope.  So should inject new _this capture
            }
        }
    }  
    
    class Foo5 {
        constructor(_this: number); // No code gen - no error
        constructor(_this: string); // No code gen - no error
        constructor(private _this: any) { // Error
                            ~~~~~
!!! Duplicate identifier '_this'. Compiler uses variable declaration '_this' to capture 'this' reference.
            var lambda = () => {
                return x => this;   // New scope.  So should inject new _this capture
            }
        }
    }