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=== tests/cases/compiler/arrayOfSubtypeIsAssignableToReadonlyArray.ts ===
class A { a }
>A : Symbol(A, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 0, 0))
>a : Symbol(A.a, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 0, 9))
class B extends A { b }
>B : Symbol(B, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 0, 13))
>A : Symbol(A, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 0, 0))
>b : Symbol(B.b, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 1, 19))
class C<T> extends Array<T> { c }
>C : Symbol(C, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 1, 23))
>T : Symbol(T, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 2, 8))
>Array : Symbol(Array, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
>T : Symbol(T, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 2, 8))
>c : Symbol(C.c, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 2, 29))
declare var ara: A[];
>ara : Symbol(ara, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 3, 11))
>A : Symbol(A, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 0, 0))
declare var arb: B[];
>arb : Symbol(arb, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 4, 11))
>B : Symbol(B, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 0, 13))
declare var cra: C<A>;
>cra : Symbol(cra, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 5, 11))
>C : Symbol(C, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 1, 23))
>A : Symbol(A, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 0, 0))
declare var crb: C<B>;
>crb : Symbol(crb, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 6, 11))
>C : Symbol(C, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 1, 23))
>B : Symbol(B, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 0, 13))
declare var rra: ReadonlyArray<A>;
>rra : Symbol(rra, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 7, 11))
>ReadonlyArray : Symbol(ReadonlyArray, Decl(lib.es5.d.ts, --, --))
>A : Symbol(A, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 0, 0))
declare var rrb: ReadonlyArray<B>;
>rrb : Symbol(rrb, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 8, 11))
>ReadonlyArray : Symbol(ReadonlyArray, Decl(lib.es5.d.ts, --, --))
>B : Symbol(B, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 0, 13))
rra = ara;
>rra : Symbol(rra, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 7, 11))
>ara : Symbol(ara, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 3, 11))
rrb = arb; // OK, Array<B> is assignable to ReadonlyArray<A>
>rrb : Symbol(rrb, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 8, 11))
>arb : Symbol(arb, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 4, 11))
rra = arb;
>rra : Symbol(rra, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 7, 11))
>arb : Symbol(arb, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 4, 11))
rrb = ara; // error: 'A' is not assignable to 'B'
>rrb : Symbol(rrb, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 8, 11))
>ara : Symbol(ara, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 3, 11))
rra = cra;
>rra : Symbol(rra, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 7, 11))
>cra : Symbol(cra, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 5, 11))
rra = crb; // OK, C<B> is assignable to ReadonlyArray<A>
>rra : Symbol(rra, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 7, 11))
>crb : Symbol(crb, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 6, 11))
rrb = crb;
>rrb : Symbol(rrb, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 8, 11))
>crb : Symbol(crb, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 6, 11))
rrb = cra; // error: 'A' is not assignable to 'B'
>rrb : Symbol(rrb, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 8, 11))
>cra : Symbol(cra, Decl(arrayOfSubtypeIsAssignableToReadonlyArray.ts, 5, 11))
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