When VisualEditor deactivates itself after Parsoid fails, this exceptions thrown because the property never got set.
ve.init.mw.ViewPageTarget.prototype.deactivate = function(override) {
if (..) {
if (..) {
this.deactivating = true;
if (ve.msg('accesskey-save') !== '-' && ve.msg('accesskey-save') !== '') {
this.elementsThatHadOurAccessKey.attr('accesskey', ..);
^ve.init.mw.ViewPageTarget.prototype.setupToolbarButtons = function () {
..
if (ve.msg('accesskey-save') !== '-' && ve.msg('accesskey-save') !== '') {
this.elementsThatHadOurAccessKey = $( .. );The code in deactivate() shouldn't be repeating conditions like that as they're no longer semantically relevant, and in this case even incorrect. Instead the top one (which usually runs after setupToolbarButtons) should limit its interest to elementsThatHadOurAccessKey itself which we either set to null or to a jQuery object.
Version: unspecified
Severity: major