Auto merge of #65305 - flip1995:clippy-beta-backport, r=pietroalbini

[Beta] Backport Clippy ICE fix to beta

There was an ICE in Clippy, when compiling `mysql_common`. Since this is a pretty popular crate, and there were a bunch of Clippy issues in the last few days, I think it is worth it to backport the fix (rust-lang/rust-clippy#4590) to beta.

cc rust-lang/rust-clippy#4653

r? @Manishearth

Author: bors