tests/cases/conformance/parser/ecmascript5/ModuleDeclarations/parserModuleDeclaration3.ts(2,3): error TS1038: A 'declare' modifier cannot be used in an already ambient context.
==== tests/cases/conformance/parser/ecmascript5/ModuleDeclarations/parserModuleDeclaration3.ts (1 errors) ====
declare module M {
declare module M2 {
~~~~~~~
!!! error TS1038: A 'declare' modifier cannot be used in an already ambient context.
}