==== tests/cases/compiler/sourceMapValidationEnums.ts (1 errors) ====
    enum e {
        x,
        y,
        x
        ~
!!! sourceMapValidationEnums.ts(4,5): error TS2000: Duplicate identifier 'x'. Additional locations:
!!! 	sourceMapValidationEnums.ts(2,5)
    }
    enum e2 {
        x = 10,
        y = 10,
        z,
        x2
    }
    enum e3 {
    }