Instance of bug
For certain categories {{PAGESINCATEGORY}} returns a negative number. See the attachment (screenshot) for an instance of the bug. At that particular time, [[Category:Attack pages for speedy deletion]] was empty while [[Category:Wikipedia protected edit requests]] contained only [[Template talk:Cite conference]].
Wikitext to reproduce on en:
{{PAGESINCATEGORY:Attack pages for speedy deletion}} : {{PAGESINCATEGORY:Wikipedia protected edit requests}}
Expected (for above scenario):
0 : 1
Actual:
-1 : -6
This may be indicative of a general inaccuracy in this magic word, but you definitely know there's something wrong when you're being told a category has negative members.
Version: 1.13.x
Severity: normal
Attached: