Only check #[allow(dead_code)] on the trait - #161932
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| fn bar() {} //~ ERROR function `bar` is never used |
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I edited on an old branch (on another machine) when trying to resolve the first comment in #161571, and then force-pushed it. So it introduced the behavior in #157885 partially.
I found this when rebasing #157885, and I was expecting a conflict about this.
r? chenyukang