When was selfhosting broken?

[Mouse <mouse%Rodents-Montreal.ORG@localhost>]

Does anyone happen to recall when VAX self-hosting broke?  It works on
1.4T, and I seem to recall that it got fixed recently, but I can't
recall when it broke.

I care because I've got a VAX 3100-80.  It seems to work with 5.2
cross-compiled (from amd64) and I'm wondering if I can expect it to
self-host.  Also, what was the symptom when it didn't work?  If nobody
recalls when it broke, then I'd like to know what to look for; also,
depending on what the issue is, I may be able to work around it.

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