`@rust-attr(derive(serde::Serialize, serde::Deserialize))` not working when adding a list property in a struct

[uAtomicBoolean]

Bug Description

An error will be raised during compilation when adding @rust-attr(derive(serde::Serialize, serde::Deserialize)) on a struct that has a list property (with the serde feature enabled).
Using @rust-attr(cfg_attr(feature="serde", derive(Serialize, Deserialize))) will remove the error when building the slint files but display warnings during compilation.
However, the error will still be raised if we try to serialize/deserialize the struct in the rust code.

The error:

   Compiling slint-rust-template v0.1.0 (E:\Programmation\slint-rust-template)
error[E0277]: the trait bound `ModelRc<slint::SharedString>: serde::Serialize` is not satisfied
    --> E:\Programmation\slint-rust-template\target\debug\build\slint-rust-template-ec625021f24eae21\out\app-window.rs:6:17
     |
   6 |      # [derive (serde :: Serialize , serde :: Deserialize)] # [derive (Default , PartialEq , Debug , Clone)] pub struct r#DocPage {
     |                 ^^^^^^^^^^^^^^^^^^ the trait `Serialize` is not implemented for `ModelRc<slint::SharedString>`
   7 |          pub r#content : sp :: ModelRc < sp :: SharedString > , pub r#description : sp :: SharedString , pub r#title : sp :: SharedString }
     |          --- required by a bound introduced by this call
     |
     = note: for local types consider adding `#[derive(serde::Serialize)]` to your `ModelRc<slint::SharedString>` type
     = note: for types from other crates check whether the crate offers a `serde` feature flag
     = help: the following other types implement trait `Serialize`:
               &'a T
               &'a mut T
               ()
               (T,)
               (T0, T1)
               (T0, T1, T2)
               (T0, T1, T2, T3)
               (T0, T1, T2, T3, T4)
             and 170 others
note: required by a bound in `slint_generatedAppWindow::_::_serde::ser::SerializeStruct::serialize_field`
    --> C:\Users\atomicboolean\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\serde_core-1.0.228\src\ser\mod.rs:1917:21
     |
1915 |     fn serialize_field<T>(&mut self, key: &'static str, value: &T) -> Result<(), Self::Error>
     |        --------------- required by a bound in this associated function
1916 |     where
1917 |         T: ?Sized + Serialize;
     |                     ^^^^^^^^^ required by this bound in `SerializeStruct::serialize_field`
     = note: this error originates in the derive macro `serde::Serialize` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0277]: the trait bound `ModelRc<slint::SharedString>: serde::Deserialize<'de>` is not satisfied
    --> E:\Programmation\slint-rust-template\target\debug\build\slint-rust-template-ec625021f24eae21\out\app-window.rs:7:26
     |
   7 |          pub r#content : sp :: ModelRc < sp :: SharedString > , pub r#description : sp :: SharedString , pub r#title : sp :: SharedString }
     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Deserialize<'_>` is not implemented for `ModelRc<slint::SharedString>`
     |
     = note: for local types consider adding `#[derive(serde::Deserialize)]` to your `ModelRc<slint::SharedString>` type
     = note: for types from other crates check whether the crate offers a `serde` feature flag
     = help: the following other types implement trait `Deserialize<'de>`:
               &'a [u8]
               &'a std::path::Path
               &'a str
               ()
               (T,)
               (T0, T1)
               (T0, T1, T2)
               (T0, T1, T2, T3)
             and 183 others
note: required by a bound in `next_element`
    --> C:\Users\atomicboolean\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\serde_core-1.0.228\src\de\mod.rs:1771:12
     |
1769 |     fn next_element<T>(&mut self) -> Result<Option<T>, Self::Error>
     |        ------------ required by a bound in this associated function
1770 |     where
1771 |         T: Deserialize<'de>,
     |            ^^^^^^^^^^^^^^^^ required by this bound in `SeqAccess::next_element`

error[E0277]: the trait bound `ModelRc<slint::SharedString>: serde::Deserialize<'de>` is not satisfied
    --> E:\Programmation\slint-rust-template\target\debug\build\slint-rust-template-ec625021f24eae21\out\app-window.rs:7:26
     |
   7 |          pub r#content : sp :: ModelRc < sp :: SharedString > , pub r#description : sp :: SharedString , pub r#title : sp :: SharedString }
     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Deserialize<'_>` is not implemented for `ModelRc<slint::SharedString>`
     |
     = note: for local types consider adding `#[derive(serde::Deserialize)]` to your `ModelRc<slint::SharedString>` type
     = note: for types from other crates check whether the crate offers a `serde` feature flag
     = help: the following other types implement trait `Deserialize<'de>`:
               &'a [u8]
               &'a std::path::Path
               &'a str
               ()
               (T,)
               (T0, T1)
               (T0, T1, T2)
               (T0, T1, T2, T3)
             and 183 others
note: required by a bound in `next_value`
    --> C:\Users\atomicboolean\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\serde_core-1.0.228\src\de\mod.rs:1916:12
     |
1914 |     fn next_value<V>(&mut self) -> Result<V, Self::Error>
     |        ---------- required by a bound in this associated function
1915 |     where
1916 |         V: Deserialize<'de>,
     |            ^^^^^^^^^^^^^^^^ required by this bound in `MapAccess::next_value`

error[E0277]: the trait bound `ModelRc<slint::SharedString>: serde::Deserialize<'de>` is not satisfied
  --> E:\Programmation\slint-rust-template\target\debug\build\slint-rust-template-ec625021f24eae21\out\app-window.rs:6:38
   |
 6 |      # [derive (serde :: Serialize , serde :: Deserialize)] # [derive (Default , PartialEq , Debug , Clone)] pub struct r#DocPage {
   |                                      ^^^^^^^^^^^^^^^^^^^^ the trait `Deserialize<'_>` is not implemented for `ModelRc<slint::SharedString>`
   |
   = note: for local types consider adding `#[derive(serde::Deserialize)]` to your `ModelRc<slint::SharedString>` type
   = note: for types from other crates check whether the crate offers a `serde` feature flag
   = help: the following other types implement trait `Deserialize<'de>`:
             &'a [u8]
             &'a std::path::Path
             &'a str
             ()
             (T,)
             (T0, T1)
             (T0, T1, T2)
             (T0, T1, T2, T3)
           and 183 others
note: required by a bound in `slint_generatedAppWindow::_::_serde::__private228::de::missing_field`
  --> C:\Users\atomicboolean\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\serde-1.0.228\src\private\de.rs:26:8
   |
24 | pub fn missing_field<'de, V, E>(field: &'static str) -> Result<V, E>
   |        ------------- required by a bound in this function
25 | where
26 |     V: Deserialize<'de>,
   |        ^^^^^^^^^^^^^^^^ required by this bound in `missing_field`
   = note: this error originates in the derive macro `serde::Deserialize` (in Nightly builds, run with -Z macro-backtrace for more info)

For more information about this error, try `rustc --explain E0277`.
error: could not compile `slint-rust-template` (bin "slint-rust-template") due to 4 previous errors

Reproducible Code (if applicable)

@rust-addr(derive(serde::Serialize, serde::Deserialize))
export struct Content {
    lines: [string]
}

serde-bug.zip

Environment Details

• Slint Version: 1.15.1
• Platform/OS: Windows 10
• Programming Language: Rust
• Backend/Renderer: default

Product Impact

No response