Quoting Jonas Smedegaard (2024-01-18 20:50:38)
> Quoting Peter Green (2024-01-18 19:29:59)
> > The autopkgtests for rust-ahash-0.7 are failing, this is blocking the
> > migration of rust-ahash-0.7 to testing which is in turn blocking the
> > migration of at least one rc bug fix to testing.
> > 
> > There are two issues, the first is that the autopkgtests are trying
> > to test a "runtime-rng" feature, but no such feature exists. My guess
> > is that there was some confusion between versions of ahash. I removed
> > the tests and the corresponding provides.
> > 
> > The second issue is more subtle. The "atomic-polyfill" feature
> > enables the dependency on the atomic-polyfill crate. However the
> > dependency on the atomic-polyfill crate is disabled on linux
> > (among many other targets). Disabling of a dependency on a target
> > overrides enabling the dependency in a feature. However the code
> > is not aware of this. The result is that building on Linux with
> > the atomic-polyfill feature enabled fails.
> 
> Thanks for the valuable input.
> 
> I am not convinced about the assessment related to and need for
> disabling runtime-rng, however, and it also seems that you applied not
> one but several measures for the atomic-polyfill issue - I will try do a
> more minimal fix for the atomic-polyfill issue to see if that is
> adequate.

Ahh, now I see the runtime-rng failure.  Seems to not be a confusion but
a hidden feature dynamically added to the publicly advertised ones, and
unexpected by the bench resolver to be explicitly declared.

Perhaps that's what you meant as well, or perhaps I am rambling - in any
case, I end at the same solution as you proposed.  Again, thanks a lot!

 - Jonas

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