RUSTSEC-2019-0017: once_cell: Panic during initialization of Lazy might trigger undefined behavior

Description

If during the first dereference of Lazy the initialization function panics, subsequent derefernces will execute `std::hints::unreachable_unchecked`.

Applications with panic = "abort" are not affected, as there will be no subsequent dereferences.

More Info

https://github.com/matklad/once_cell/issues/46

Patched Versions

Unaffected Versions