Auto merge of #89572 - Manishearth:rollup-obz5ycp, r=Manishearth

Rollup of 10 pull requests

Successful merges:

 - #88706 (Normalize associated type projections when checking return type of main)
 - #88828 (Use `libc::sigaction()` instead of `sys::signal()` to prevent a deadlock)
 - #88871 (Fix suggestion for nested struct patterns)
 - #89317 (Move generic error message to separate branches)
 - #89351 (for signed wrapping remainder, do not compare lhs with MIN)
 - #89442 (Add check for duplicated doc aliases)
 - #89502 (Fix Lower/UpperExp formatting for integers and precision zero)
 - #89523 (Make `proc_macro_derive_resolution_fallback` a future-breakage lint)
 - #89532 (Document behavior of  `MaybeLiveLocals` regarding enums and field-senstivity)
 - #89546 (Make an initial guess for metadata size to reduce buffer resizes)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup