=== tests/cases/compiler/moduleAssignmentCompat1.ts ===
module A {
>A : Symbol(A, Decl(moduleAssignmentCompat1.ts, 0, 0))

    export class C { }
>C : Symbol(C, Decl(moduleAssignmentCompat1.ts, 0, 10))
}
module B {
>B : Symbol(B, Decl(moduleAssignmentCompat1.ts, 2, 1))

    export class C { }
>C : Symbol(C, Decl(moduleAssignmentCompat1.ts, 3, 10))

    class D { }
>D : Symbol(D, Decl(moduleAssignmentCompat1.ts, 4, 22))
}

var a: A;
>a : Symbol(a, Decl(moduleAssignmentCompat1.ts, 8, 3))
>A : Symbol(A)

var b: B;
>b : Symbol(b, Decl(moduleAssignmentCompat1.ts, 9, 3))
>B : Symbol(B)

// no error
a = b;
>a : Symbol(a, Decl(moduleAssignmentCompat1.ts, 8, 3))
>b : Symbol(b, Decl(moduleAssignmentCompat1.ts, 9, 3))

b = a;
>b : Symbol(b, Decl(moduleAssignmentCompat1.ts, 9, 3))
>a : Symbol(a, Decl(moduleAssignmentCompat1.ts, 8, 3))