[Pkg-rust-maintainers] Bug#1069796: rust-abscissa-derive - (build-)depends unsatisfiable.

[Peter Green]

Package: rust-abscissa-derive
Version: 0.7.0-1
Severity: serious

rust-synstructure was recently updated to version 0.13.1

I tried bumping the dependency but that caused failures due to
mismatched versions of syn. Bumping the dependency on syn as well
resulted in.

> 
> error[E0432]: unresolved import `syn::NestedMeta`
>  --> src/component.rs:5:60
>   |
> 5 | use syn::{DeriveInput, Lit, Meta, MetaList, MetaNameValue, NestedMeta};
>   |                                                            ^^^^^^^^^^ no `NestedMeta` in the root
> 
> error[E0615]: attempted to take value of method `path` on type `&Attribute`
>   --> src/component.rs:56:22
>    |
> 56 |             if !attr.path.is_ident("component") {
>    |                      ^^^^ method, not a field
>    |
> help: use parentheses to call the method
>    |
> 56 |             if !attr.path().is_ident("component") {
>    |                          ++
> 
> error[E0599]: no method named `parse_meta` found for reference `&Attribute` in the current scope
>   --> src/component.rs:60:24
>    |
> 60 |             match attr.parse_meta().expect("error parsing meta") {
>    |                        ^^^^^^^^^^ help: there is a method with a similar name: `parse_nested_meta`
> 
> error[E0026]: struct `MetaList` does not have a field named `nested`
>   --> src/component.rs:61:39
>    |
> 61 |                 Meta::List(MetaList { nested, .. }) => {
>    |                                       ^^^^^^ struct `MetaList` does not have this field
> 
> error[E0026]: struct `MetaNameValue` does not have a field named `lit`
>    --> src/component.rs:135:17
>     |
> 135 |                 lit: Lit::Str(lit_str),
>     |                 ^^^ struct `MetaNameValue` does not have this field
> 
> Some errors have detailed explanations: E0026, E0432, E0599, E0615.

Since rust-abscissa-derive has no reverse dependencies I did not investigate further.