tests/cases/compiler/undeclaredBase.ts(1,37): error TS2339: Property 'I' does not exist on type 'typeof M'.


==== tests/cases/compiler/undeclaredBase.ts (1 errors) ====
    module M { export class C extends M.I { } }
                                        ~
!!! error TS2339: Property 'I' does not exist on type 'typeof M'.