mf.schemaEditAttemptStep: Unrecognized action abort
computeDuration	@	schemaEditAttemptStep.js?026db:84
(anonymous)	@	schemaEditAttemptStep.js?026db:99
handler	@	mediawiki.base.js?80f9f:333
fire	@	jquery.js?6a07d:3268
fireWith	@	jquery.js?6a07d:3398
fire	@	jquery.js?6a07d:3406
mw.track	@	mediawiki.base.js?80f9f:309
log	@	EditorOverlayBase.js?5fee0:176
onExitClick	@	EditorOverlayBase.js?5fee0:341
dispatch	@	jquery.js?6a07d:5183
elemData.handle	@	jquery.js?6a07d:4991

...
		function computeDuration( action, event, timeStamp ) {
			// This is duplicated from the VisualEditor extension
			// (ve.init.mw.trackSubscriber.js). Changes to this should be kept in
			// sync with that file, so the data remains consistent.
			if ( event.timing !== undefined ) {
				return event.timing;
			}

			switch ( action ) {
				case 'ready':
					return timeStamp - timing.init;
				case 'loaded':
					return timeStamp - timing.init;
				case 'saveIntent':
					return timeStamp - timing.ready;
				case 'saveAttempt':
					return timeStamp - timing.saveIntent;
				case 'saveSuccess':
				case 'saveFailure':
					// HERE BE DRAGONS: the caller must compute these themselves
					// for sensible results. Deliberately sabotage any attempts to
					// use the default by returning -1
					mw.log.warn( 'mf.schemaEditAttemptStep: Do not rely on default timing value for saveSuccess/saveFailure' );
					return -1;
				case 'abort':
					switch ( event.type ) {
						case 'preinit':
							return timeStamp - timing.init;
						case 'nochange':
						case 'switchwith':
						case 'switchwithout':
						case 'switchnochange':
						case 'abandon':
							return timeStamp - timing.ready;
						case 'abandonMidsave':
							return timeStamp - timing.saveAttempt;
					}
			}
			mw.log.warn( 'mf.schemaEditAttemptStep: Unrecognized action', action );
			return -1;
		}
...

abort_mechanism: "cancel"
abort_type: "nochange"
action: "abort"
editing_session_id: "6acfc0f1bbffa8edceba"
editor_interface: "wikitext"

^-- no type!