Question on returning instances of a (not exported) derived class

Sander Mak sander.mak at
Fri Aug 26 07:50:00 UTC 2016

Hi Martin,

> On 25 Aug 2016, at 14:03, Martin Lehmann <martin.lehmann at> wrote:
> About case [2] you wrote
> *  Are you sure you didn't have the toString() method overridden in
> InternalData at time of compilation?
> Yes, I am sure. I agree, this should compile. At least this compiler error
> message is confusing.

You're not the only one who finds the message confusing. I ran into a similar situation a while ago; you might be interested in reading this thread as well:


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