[buddypress-trac] [BuddyPress Trac] #8037: WP 5.1 `wp_parse_id_list()` check breaks `parent_id` parsing

[buddypress-trac]

#8037: WP 5.1 `wp_parse_id_list()` check breaks `parent_id` parsing
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 Reporter:  boonebgorges  |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  4.2.0
Component:  Groups        |    Version:
 Severity:  normal        |   Keywords:
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 In [11095], when hierarchical groups were introduced, we exploited the
 behavior of `wp_parse_id_list()` that converted `false` to `0`. This no
 longer happens: https://core.trac.wordpress.org/ticket/43977
 https://core.trac.wordpress.org/changeset/44546

 The logic at https://buddypress.trac.wordpress.org/browser/tags/4.1.0/src
 /bp-groups/classes/class-bp-groups-group.php?marks=1206#L1204 needs
 changing.

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Ticket URL: <https://buddypress.trac.wordpress.org/ticket/8037>
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