[1963da34] Possible backward incompatibility:
File "backward_incompatible_record_if_implicit_defaults_old.atd", line 2, characters 2-24
File "backward_incompatible_record_if_implicit_defaults_new.atd", line 2, characters 2-23:
Newly required field 'becomes_required' was optional but had a default value.
If old implementations in use always populate the JSON field
with a value (using atdgen's option -j-defaults or equivalent),
then there's no problem and you should use
'atddiff --json-defaults-old' to disable this warning.
The following types are affected:
  backward_incompatible_record_if_implicit_defaults

