Panic in `generate_delegate_trait` when trying to get source scope

[DropDemBits]

Trying to get assists on the tuple field type of

#[derive(Debug, Clone, Copy, PartialEq, Eq)]
#[repr(transparent)]
pub struct Error(pub winresult::NtStatus);

panics with "thread 'Worker' panicked at 'called Option::unwrap() on a None value', crates\ide-assists\src\handlers\generate_delegate_trait.rs:345:58"

Which points to here:

rust-analyzer/crates/ide-assists/src/handlers/generate_delegate_trait.rs

Line 345 in 429a381

let source = ctx.sema.scope(source.syntax()).unwrap();

Fix would be to

• make generate_impl return Option<ast::Impl> instead of ast::Impl
• change all of the unwraps in generate_impl with ?
• change this to a let Some(delegate) = ... else { continue };
  

  rust-analyzer/crates/ide-assists/src/handlers/generate_delegate_trait.rs

  Line 216 in 429a381

  let delegate = generate_impl(ctx, self, &field.ty, &field.name, delegee);

---

rust-analyzer version: rust-analyzer 0.3.1607-standalone (429a381 2023-07-30)

rustc version: rustc 1.73.0-nightly (500647f 2023-07-27)

relevant settings: (eg. client settings, or environment variables like CARGO, RUSTC, RUSTUP_HOME or CARGO_HOME)

Dependencies:

• bytemuck 1.13.1
• winresult-types 0.1.3
• winresult 0.1.3

[DropDemBits]

Apparently just this also reproduces the issue too:

pub struct Error(pub winresult::NtStatus);