ZipStorage panics when failing to open/read zip file

[ctb]

If you run ZipStorage::fromfile,

sourmash/src/core/src/storage/mod.rs

Line 402 in 7362b43

pub fn from_file<P: AsRef<Path>>(location: P) -> Result<Self> {

this code

            archive_builder: |mapping: &Option<memmap2::Mmap>| {
                piz::ZipArchive::new(mapping.as_ref().unwrap()).unwrap()
            },

will panic, presumably because of the second unwrap() which fails to handle ZipArchive errors.

When I try to switch the second unwrap to a ?, I get:

error[E0277]: the `?` operator can only be used in a closure that returns `Result` or `Option` (or another type that implements `FromResidual`)
   --> src/core/src/storage/mod.rs:409:64
    |
408 |             archive_builder: |mapping: &Option<memmap2::Mmap>| {
    |                              --------------------------------- this function should return `Result` or `Option` to accept `?`
409 |                 piz::ZipArchive::new(mapping.as_ref().unwrap())?
    |                                                                ^ cannot use the `?` operator in a closure that returns `ZipArchive<'_>`
    |
    = help: the trait `FromResidual<std::result::Result<Infallible, ZipError>>` is not implemented for `ZipArchive<'_>`

For more information about this error, try `rustc --explain E0277`.
error: could not compile `sourmash` (lib) due to 1 previous error

which I vaguely understand ;).

I feel like the right thing to do is to move this outside the builder, but not sure.

[ctb]

Figured it out! You can use ZipStorageTryBuilder!! see #3431