tests/cases/compiler/spaceBeforeQuestionMarkInPropertyAssignment.ts(1,12): error TS1162: An object member cannot be declared optional.


==== tests/cases/compiler/spaceBeforeQuestionMarkInPropertyAssignment.ts (1 errors) ====
    var x = {x ?: 1} // should not crash
               ~
!!! error TS1162: An object member cannot be declared optional.