Rust compiler 1.94

[NeymanPros]

Hello! I tried to compile Reckless for myself using rustc 1.94, and it failed. Said
if [condition] && let {}
is unstable (/src/search.rs: 375), normal thing for > 1.91. And one more issue, sorry, don't remember which exactly.

And I thought, may be the same issue happened in TCEC - they must be using the most recent compiler. This doesn't explain how it can work and how it even compiled.

That got me thinking, what if newer compiler changed something else. I checked, it get some LLVM changes and AVX support.

Also, rustc 1.94 is out 5 of Mar - right after DivP (previous event in tcec) but before SuFi.