swift

95d6ddf9 - NCGenerics: handle failure to load stdlib

NCGenerics: handle failure to load stdlib The stdlib module can end up being a non-null ModuleDecl that contains no files, due to a failure to load the stdlib. In such an unusual case, fall-back to synthesizing Copyable/Escapable into the Builtin module so that Sema can proceed. rdar://129092011 (cherry picked from commit b02b94cd526a7c57db5b5f532535f35c51e36f7f)