Re: Rustc version

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Hello,

Know that this is one of the cases that is explicitly not covered under the stability guarantee, i.e that code without warnings may get warnings on the next version, as said in the documentation [1]:

> Lints will evolve over time (both the lints that are enabled and the precise cases that lints catch).

This crate is explicitly denying warnings, and thus is affected by this explicit hole in the stability guarantees.

This, the crate should fix the bug, and a one-line patch is enough to hide the issue downstream in Fedora, by adding an `#![allow(...)]` line at the start of the affected crate. However, it would be better if the issue was really fixed by either removing or using the unused field.

[1]: https://rust-lang.github.io/rfcs/1122-language-semver.html#underspecified-language-semantics

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Albert Larsan - 95EB60E950649DCAE66262F1D27C26E057F0D9A5
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