action=parse throws an error when you try to parse a summary: https://de.wikipedia.org/w/api.php?action=parse&summary=foo&format=jsonfm should parse the contents of the summary parameter (as summary), but instead complains about a missing text parameter: "The text parameter should be passed with the title parameter. Should you be using the \"page\" parameter instead?"
According to blame this is broken since Gerrit Change #20896.
(And when you fix it, can you just add an example for the summary parameter? This is a more or less undocumented feature.)
Version: 1.22.0
Severity: normal