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=== tests/cases/compiler/optionalTupleElementsAndUndefined.ts ===
// Repro from #50753
type UnNullify<T> = { [K in keyof T]: NonNullable<T[K]> };
>UnNullify : Symbol(UnNullify, Decl(optionalTupleElementsAndUndefined.ts, 0, 0))
>T : Symbol(T, Decl(optionalTupleElementsAndUndefined.ts, 2, 15))
>K : Symbol(K, Decl(optionalTupleElementsAndUndefined.ts, 2, 23))
>T : Symbol(T, Decl(optionalTupleElementsAndUndefined.ts, 2, 15))
>NonNullable : Symbol(NonNullable, Decl(lib.es5.d.ts, --, --))
>T : Symbol(T, Decl(optionalTupleElementsAndUndefined.ts, 2, 15))
>K : Symbol(K, Decl(optionalTupleElementsAndUndefined.ts, 2, 23))
type Foo = UnNullify<[a: 1, b?: 2 | undefined]>;
>Foo : Symbol(Foo, Decl(optionalTupleElementsAndUndefined.ts, 2, 58))
>UnNullify : Symbol(UnNullify, Decl(optionalTupleElementsAndUndefined.ts, 0, 0))
type Test = [a: 1, b?: 2] extends Foo ? true : false; // true
>Test : Symbol(Test, Decl(optionalTupleElementsAndUndefined.ts, 4, 48))
>Foo : Symbol(Foo, Decl(optionalTupleElementsAndUndefined.ts, 2, 58))
// Types in the following declarations should be identical
var v: [1, 2?];
>v : Symbol(v, Decl(optionalTupleElementsAndUndefined.ts, 10, 3), Decl(optionalTupleElementsAndUndefined.ts, 11, 3), Decl(optionalTupleElementsAndUndefined.ts, 12, 3), Decl(optionalTupleElementsAndUndefined.ts, 13, 3), Decl(optionalTupleElementsAndUndefined.ts, 14, 3) ... and 3 more)
var v: [1, (2 | undefined)?];
>v : Symbol(v, Decl(optionalTupleElementsAndUndefined.ts, 10, 3), Decl(optionalTupleElementsAndUndefined.ts, 11, 3), Decl(optionalTupleElementsAndUndefined.ts, 12, 3), Decl(optionalTupleElementsAndUndefined.ts, 13, 3), Decl(optionalTupleElementsAndUndefined.ts, 14, 3) ... and 3 more)
var v: [a: 1, b?: 2];
>v : Symbol(v, Decl(optionalTupleElementsAndUndefined.ts, 10, 3), Decl(optionalTupleElementsAndUndefined.ts, 11, 3), Decl(optionalTupleElementsAndUndefined.ts, 12, 3), Decl(optionalTupleElementsAndUndefined.ts, 13, 3), Decl(optionalTupleElementsAndUndefined.ts, 14, 3) ... and 3 more)
var v: [a: 1, b?: 2 | undefined];
>v : Symbol(v, Decl(optionalTupleElementsAndUndefined.ts, 10, 3), Decl(optionalTupleElementsAndUndefined.ts, 11, 3), Decl(optionalTupleElementsAndUndefined.ts, 12, 3), Decl(optionalTupleElementsAndUndefined.ts, 13, 3), Decl(optionalTupleElementsAndUndefined.ts, 14, 3) ... and 3 more)
var v: UnNullify<[1, 2?]>;
>v : Symbol(v, Decl(optionalTupleElementsAndUndefined.ts, 10, 3), Decl(optionalTupleElementsAndUndefined.ts, 11, 3), Decl(optionalTupleElementsAndUndefined.ts, 12, 3), Decl(optionalTupleElementsAndUndefined.ts, 13, 3), Decl(optionalTupleElementsAndUndefined.ts, 14, 3) ... and 3 more)
>UnNullify : Symbol(UnNullify, Decl(optionalTupleElementsAndUndefined.ts, 0, 0))
var v: UnNullify<[1, (2 | undefined)?]>;
>v : Symbol(v, Decl(optionalTupleElementsAndUndefined.ts, 10, 3), Decl(optionalTupleElementsAndUndefined.ts, 11, 3), Decl(optionalTupleElementsAndUndefined.ts, 12, 3), Decl(optionalTupleElementsAndUndefined.ts, 13, 3), Decl(optionalTupleElementsAndUndefined.ts, 14, 3) ... and 3 more)
>UnNullify : Symbol(UnNullify, Decl(optionalTupleElementsAndUndefined.ts, 0, 0))
var v: UnNullify<[a: 1, b?: 2]>;
>v : Symbol(v, Decl(optionalTupleElementsAndUndefined.ts, 10, 3), Decl(optionalTupleElementsAndUndefined.ts, 11, 3), Decl(optionalTupleElementsAndUndefined.ts, 12, 3), Decl(optionalTupleElementsAndUndefined.ts, 13, 3), Decl(optionalTupleElementsAndUndefined.ts, 14, 3) ... and 3 more)
>UnNullify : Symbol(UnNullify, Decl(optionalTupleElementsAndUndefined.ts, 0, 0))
var v: UnNullify<[a: 1, b?: 2 | undefined]>;
>v : Symbol(v, Decl(optionalTupleElementsAndUndefined.ts, 10, 3), Decl(optionalTupleElementsAndUndefined.ts, 11, 3), Decl(optionalTupleElementsAndUndefined.ts, 12, 3), Decl(optionalTupleElementsAndUndefined.ts, 13, 3), Decl(optionalTupleElementsAndUndefined.ts, 14, 3) ... and 3 more)
>UnNullify : Symbol(UnNullify, Decl(optionalTupleElementsAndUndefined.ts, 0, 0))
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