[01:38:41] <tgr>	 anomie: did something around action API parameter defaults handling change? a bool field with no default value is set to null in wmf.18 when it is not in the submit data; based on how that broke some staff, it seems in wmf.16 it is set to false
[01:40:49] <tgr>	 presumably this changed with https://gerrit.wikimedia.org/r/c/mediawiki/core/+/434718
[01:42:10] <Reedy>	 that didn't land in .18...
[01:53:08] <tgr>	 yeah, my bad. Only master is broken.
[01:54:36] <tgr>	 the old logic used WebRequest::getCheck which always returned a boolean; the new logic in ParameterValidator has special handling for null and the typedef class gets largely ignored in that case (so null remains null)
[02:07:57] <tgr>	 filed as T244440
[02:07:57] <stashbot>	 T244440: Action API returns null for unset bool parameter - https://phabricator.wikimedia.org/T244440