Static UNSAFE_PANIC_HANDLERS 

pub static UNSAFE_PANIC_HANDLERS: &Lint

The unsafe_panic_handlers lint detects unsafe functions with the #[panic_handler] attribute.

Example

#![no_std]

use core::panic::PanicInfo;

#[panic_handler]
unsafe fn handle(_: &PanicInfo<'_>) -> ! {
    loop {}
}

{{produces}}

Explanation

Unsafe functions (declared as unsafe fn) are functions that can only be called when the caller ensures that their safety requirements are met. On the other hand, #[panic_handler] functions get called automatically by the compiler without checking for any preconditions. Therefore, using the #[panic_handler] attribute on unsafe functions is either incorrect or a misuse of unsafe fn.

This is a [future-incompatible] lint to transition this to a hard error in the future. See issue #163263 for more details.