pub fn take_alloc_error_hook() -> fn(_: Layout)
Unregisters the current allocation error hook, returning it.
See also the function set_alloc_error_hook.
If no custom hook is registered, the default hook will be returned.
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Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/alloc/fn.take_alloc_error_hook.html