The warning is visible with clang 9.0 -Wdeprecated as:

warning: definition of implicit copy constructor for 'Invalid' is deprecated because it has a user-declared destructor

Notice that the copy constructors were removed here: fdf1a882, and this commmits
appears also in v2.5 and v2.6.

This fix should be probably backported to v2.5 and v2.6.

Adding more int types to printField, scanField, convert

Initial opes module

Update VES targets TD_MULTI*

(should not work indeed).

See #619

safety specifications in Kernels and State files, and other minor improvements that where not synced

Fixes #616