# Function std::panic::set_handler [−] [src]

    pub fn set_handler<F>(handler: F) where F: Fn(&PanicInfo) + 'static + Sync + Send

Unstable (`panic_handler` #30449)

: awaiting feedback

Registers a custom panic handler, replacing any that was previously registered.

The panic handler is invoked when a thread panics, but before it begins unwinding the stack. The default handler prints a message to standard error and generates a backtrace if requested, but this behavior can be customized with the `set_handler` and `take_handler` functions.

The handler is provided with a `PanicInfo` struct which contains information about the origin of the panic, including the payload passed to `panic!` and the source code location from which the panic originated.

The panic handler is a global resource.

# Panics

Panics if called from a panicking thread.

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