Global does not recognize C++ final keyword

[Alex Pelts]

What is your environment (OS)?
Ubuntu 18.04.1 LTS
Which version of Global are you using?
Tried 6.6.2 which is available with apt-get and 6.6.8 which I built from
source. Both versions show the same issue.
What did you do? (command line)
gtags .
global -dx Model
global -dx final
global -dx struct

What did you expect from it?
global -dx Model
Expected for the tool to show definition of model
global -dx final
Expected not to show any definitions
global -dx struct
Expected not to show any definitions

What was occurred? (as is)
global -dx Model
Did not show any definitions
global -dx final
final              16 cpp-test.cpp     struct Model final {
final              17 cpp-test.cpp         struct ExtensionNameAndPrefix
final {
global -dx struct
Did not show any definitions

Attached is the relevant CPP file.

Thank you,
Alex

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cpp-test.cpp
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