The HandleAllocator type uses the Data.Parameterized.Nonce.Unsafe interface which can cause programs to have unsafe memory behavior if more than one handle allocator is created.

We should transition FunctionHandle module to use the globalNonceGenerator from "Data.Parameterized.Nonce" instead. This would have the additional, very convenient, side effect that we wouldn't need to pass HandleAllocator values around anymore, as creating fresh handles could simply use the globally available nonce generator instead.