[07:59:25] <wm-bb>	 <Al> Thanks, James. I created https://phabricator.wikimedia.org/T315135 to document the bug. (re @wmtelegram_bot: <James_F> The page 'Z14' is actually a Z2/Persistent object encapsulating a Z4/Type representing the concept of Z14/Implementati...)
[10:43:09] <wm-bb>	 <AracasDragon> I saw it but it’s weird, the composition implementation on Z10072 only links to Z14 (I wonder if it does exist or if it’s just an empty row) (re @Al: From the function page, you will sometimes get the Composition implementation, which works. As far as I can see, no new implemen...)
[10:44:05] <wm-bb>	 <AracasDragon> (same as the test “Tester” which appears to pass both implementations on the function page but doesn’t appear on the implementation page, and only links to Z20)
[12:49:06] <wm-bb>	 <Al> True. I just created a new function and got a Composition Implementation listed immediately. I’m guessing that’s because the list of implementations begins with “Z14” (the type for the typed list) even though the list is empty. I do get a different error, though ("Z507K1": "Could not find any implementations for Z10080.") (re @AracasDragon: I saw it but it’s weird, the composition implementation on Z10072 only links t
[13:06:43] <wm-bb>	 <Al> I now think I was wrong. There is no Composition Implementation here, despite its appearance in the list. This suggests that the Python implementation (https://wikifunctions.beta.wmflabs.org/wiki/Z10074) is responsible for the very occasional successful evaluation. Somewhat reassuring, perhaps, but also deeply perplexing.🧐 (re @Al: From the function page, you will sometimes get the Composition implementation, which works. As