Rollup merge of #65360 - Centril:mbrpt, r=petrochenkov
Rollup merge of #65360 - Centril:mbrpt, r=petrochenkov

mbe: reduce panictry! uses.

Extracted from https://github.com/rust-lang/rust/pull/65324.

r? @petrochenkov

aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,graydon/rust,graydon/rust