Diagnostic warning despite #[allow(non_snake_case)] and incorrect fix for Greek characters

[vankessel]

rust-analyzer version: 0.4.1265-standalone (ba28e19 2022-10-29)

rustc version: 1.64.0 (a55dd71d5 2022-09-19)

RA doesn't seem to take attributes into account. #[allow(non_snake_case)] is hidden behind the tooltip in this photo:

Also, the recommended fix also doesn't change anything. It should suggest lowercase delta, δ. This also happens for the other Greek characters like lamda. I suspect all non-ascii characters with lowercase and uppercase variants suffer from this.

Possibly related:
#8747
#12651

[lowr]

We currently don't have a means to handle attributes on expressions/statements. This is probably to be tracked in #6541.

As for the incorrect fix, that's a distinct problem and should be fixed separately.