This is a tracking issue for RFC 3007 "Plan to make core and std's panic identical": rust-lang/rfcs#3007

Steps

• Add a lint for format strings incompatible with the edition change: Add lint for panic!("{}") #78088
• Add std::panic::panic_any: Add std::panic::panic_any. #74622
• Stabilize std::panic::panic_any: Tracking issue Tracking Issue for panic_any #78500, PR Stabilize std::panic::panic_any. #81194
• Add a lint for panicking on non-string-literals (and suggest panic_any): Add lint for panic!(123) which is not accepted in Rust 2021. #81645
• Update panic!() documentation about non-string-literals: Part of Add lint for panic!(123) which is not accepted in Rust 2021. #81645
• Throw a &str instead of a String in std when using core::panic!: Throw core::panic!("message") as &str instead of String. #78119
• Fix hygiene in todo!(), assert_eq!(), etc. to always use core::panic!(): Qualify panic! as core::panic! in non-built-in core macros #78343
• Fix assert!(expr, message) to call core's panic mechanism directly: Part of Add lint for panic!("{}") #78088
• Fix assert!(expr) to call core's panic mechanism directly in edition 2021: Expand assert!(expr, args..) to include $crate for hygiene on 2021. #80855
• Make {std, core}::panic!(..) always use format_args!(..) in edition 2021: Implement Rust 2021 panic #80851
  • This needs Allow #[rustc_builtin_macro = "name"] #80850.
• Make std::panic!(..) an alias for core::panic!(..) in edition 2021: Make std::panic!() identical to core::panic!() on Rust 2021 #80879 Included in Implement Rust 2021 panic #80851.
  • This requires core::panic!() cannot be used everywhere std::panic!() can. #80846 to be fixed first
• Update panic_fmt lint to mention edition 2021: Part of Add lint for panic!(123) which is not accepted in Rust 2021. #81645
• Fix 2021's assert!(123, "{}") expanding to the wrong edition of panic!(): Fix bug with assert!() calling the wrong edition of panic!(). #81647
• Rename the panic_fmt lint to non_fmt_panic (see Add lint for panic!("{}") #78088 (comment)): Part of Add lint for panic!(123) which is not accepted in Rust 2021. #81645, beta backport in [beta] Rename panic_fmt lint to non_fmt_panic #81729