[wp-trac] [WordPress Trac] #51913: Potential `unsupported operand types` dashboard fatal on PHP8 + multisite + upload space check

[WordPress Trac]

#51913: Potential `unsupported operand types` dashboard fatal on PHP8 + multisite +
upload space check
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 Reporter:  iandunn             |       Owner:  iandunn
     Type:  defect (bug)        |      Status:  accepted
 Priority:  highest omg bbq     |   Milestone:  5.6
Component:  Administration      |     Version:
 Severity:  blocker             |  Resolution:
 Keywords:  php8 needs-testing  |     Focuses:  administration, multisite
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Comment (by iandunn):

 To reproduce, I got back to a 5.5 state:

 1. `svn sw ^/branches/5.5`
 1. manually deleted transients in `wp_{main site id}_options`
 1. loaded main site dashboard
 1. checked database, saw that transient had `size` subarray

 ...then tried to upgrade again:

 1. `svn sw ^/branches/5.6`
 1. loaded main site dashboard, saw fatal in the widget

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Ticket URL: <https://core.trac.wordpress.org/ticket/51913#comment:2>
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