Field Groups not created properly in PHP7.1

[tobybellwood]

One issue is field groups with features where the field groups are not created properly
(from https://community.govcms.gov.au/t/php7-1-and-govcms/1304)

[markpnb]

I'll update this shortly, the issue was found 12 months ago with earlier PHP7.0 and the field groups in features had an empty array key, so instead of something like $field_groups['group_1|entityform|form_type|form'] = $field_group; it just looked like $field_groups[''] = $field_group; which would be the same for all field groups in the file

[markpnb]

*.field_group.inc is the features generated file, $field_group is the stdClass with all the data and metadata which looks fine, it was just the last line of each block where the field_group was meant to be added to the field groups. I need to fix a different issue first, and then I'll see if this is still a problem with a more modern D7 and PHP7.1