# [−][src]Function std::alloc::set_alloc_error_hook

    pub fn set_alloc_error_hook(hook: fn(_: Layout))

🔬 This is a nightly-only experimental API. (`alloc_error_hook` #51245)

Registers a custom allocation error hook, replacing any that was previously registered.

The allocation error hook is invoked when an infallible memory allocation fails, before the runtime aborts. The default hook prints a message to standard error, but this behavior can be customized with the `set_alloc_error_hook` and `take_alloc_error_hook` functions.

The hook is provided with a `Layout` struct which contains information about the allocation that failed.

The allocation error hook is a global resource.