Type variable information is not always maintained for anonymous classes

[Sergey]

Hi everyone,

Recently I've stumbled upon this bug
https://bugs.openjdk.java.net/browse/JDK-8213465
which is named the same way as in the header of an email. I've done a
little bit of
investigation and keen to fix it. Though I'm afraid that most likely fix
wouldn't be just
a one-liner. Thus I want to ask for a little bit of a guidance and make
sure, that I do not cross
anyone else. With that being said, if ticket isn't in progress and no one
minds I want to make
an attempt on it.

Thanks and regards,
Sergei