pgehres wrote:

Looks like https://wikimediafoundation.org/wiki/Special:FundraiserStatistics has long since replaced that page. And since its working (at the moment), resolving.

It didn't replace it, Special:ContributionHistory was disabled because of performance reasons (it almost brought wikis down) and never re-enabled after that, if I remember correctly.
But yes, as long as there are no plans to re-enable it this bug makes no sense obviously.

(From bug 26026 comment #4)

Bug 25440 is about providing an API module for Special:ContributionHistory (or
Special:ContributionHistory/en more specifically). Tomasz added an "emergency"
redirect in r76647 from Special:ContributionHistory(/en) to
Special:FundraiserStatistics. This should be reversed.
Special:ContributionHistory(/en) provides a log of donor comments and amounts.
Bug 25440 is about adding an API module to allow easier bot/script access to
donor comments.

I've added at note: https://wikimediafoundation.org/w/index.php?title=MediaWiki%3AContribstats-header&diff=84178&oldid=74773

(Quoting bug 25440 comment #5)

ContributionHistory is no longer used. Marking wontfix.