check that flip doesn't accept repeating dimensions (#77500)
Per title.
Before this PR `flip` throws errors on invalid inputs from ATen implementation itself, and not from error checks happening in prims/refs.
We should make sure that prims/refs do all the necessary error checking (@mruberry is going to test that by moving reference error inputs testing to call meta implementations instead of real ones).
In general, most error checking should live in refs, prims meta functions should propagate the necessary properties, but they should assume that they are getting valid inputs. The checks on the inputs should happen in refs, where they can be traced to the necessary guards, or lead to RuntimeErrors during tracing.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/77500
Approved by: https://github.com/mruberry
