Change Details

When I'm migrate to MW 1.31-rc.0, using REL1_31 ([2d2c8fc](https://gerrit.wikimedia.org/g/mediawiki/extensions/VisualEditor/+/2d2c8fcffe69d929489fc5c941fdad028b004b3e)) of VE, I got: ``` mod_fcgid: stderr: PHP Warning: Illegal string offset 'revid' in /srv/mediawiki-1.31-rc.0/w/extensions/VisualEditor/includes/ApiVisualEditor.php on line 351, referer: https://xxx.org/w/index.php?title=%E9%A6%96%E9%A1%B5&veaction=editsource ``` **Steps to reproduce:** Using 2017 new editor to edit any page.

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