[BUGFIX lts] Allow computeds to have cycles in their deps #19178
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The bugfix for disallowed cycles in tracked props in #19138 attempted to also narrow the number of cycles that are allowed in general. Cycles should only be allowed for computed property deps, for legacy support reasons. The logic to allow cycles for these tags in particular was mistakenly added to `setup`, which runs on the _prototype_ of the class. This meant that _instance_ computed props were not allowed to have cycles, and this was causing failures in the ecosystem. Added a test that failed and is fixed with this change. I also attempted to create a cycle with `@alias` since it uses a different implementation, but I wasn't able to create one which didn't result in a Maximum Callstack style recursion error, so I think it's just not possible at all anyways, since `@alias` is eager always and never caches.
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The bugfix for disallowed cycles in tracked props in #19138 attempted
to also narrow the number of cycles that are allowed in general. Cycles
should only be allowed for computed property deps, for legacy support
reasons. The logic to allow cycles for these tags in particular was
mistakenly added to
setup, which runs on the prototype of the class.This meant that instance computed props were not allowed to have
cycles, and this was causing failures in the ecosystem.
Added a test that failed and is fixed with this change. I also attempted
to create a cycle with
@aliassince it uses a differentimplementation, but I wasn't able to create one which didn't result in
a Maximum Callstack style recursion error, so I think it's just not
possible at all anyways, since
@aliasis eager always and nevercaches.