Today I spent about 6 hours figuring out the details of rustc bootstrapping, and got knowledge of some things I'd prefer not to. And all that only to find that the support team didn't read my ticket and just uploaded wrong sources to buildserver.
Also, I found out that I'm not the only one to consider rustc bootstrap complex, and there's a useful article with lots of details: https://jyn.dev/2023/01/12/Bootstrapping-Rust-in-2023.html
@rayslava Support team always lies :blobcatcoffee: