diff --git a/src/librustc_expand/expand.rs b/src/librustc_expand/expand.rs index 8ed7bbf6e12..84fe609ef9a 100644 --- a/src/librustc_expand/expand.rs +++ b/src/librustc_expand/expand.rs @@ -503,13 +503,12 @@ pub fn fully_expand_fragment(&mut self, input_fragment: AstFragment) -> AstFragm } fn error_derive_forbidden_on_non_adt(&self, derives: &[Path], item: &Annotatable) { - let attr = - attr::find_by_name(item.attrs(), sym::derive).expect("`derive` attribute should exist"); - let span = attr.span; + let attr = attr::find_by_name(item.attrs(), sym::derive); + let span = attr.map_or(item.span(), |attr| attr.span); let mut err = self .cx .struct_span_err(span, "`derive` may only be applied to structs, enums and unions"); - if let ast::AttrStyle::Inner = attr.style { + if let Some(ast::Attribute { style: ast::AttrStyle::Inner, .. }) = attr { let trait_list = derives.iter().map(|t| pprust::path_to_string(t)).collect::>(); let suggestion = format!("#[derive({})]", trait_list.join(", ")); err.span_suggestion( diff --git a/src/test/ui/malformed/issue-69341-malformed-derive-inert.rs b/src/test/ui/malformed/issue-69341-malformed-derive-inert.rs new file mode 100644 index 00000000000..24692f7cf52 --- /dev/null +++ b/src/test/ui/malformed/issue-69341-malformed-derive-inert.rs @@ -0,0 +1,10 @@ +fn main() {} + +struct CLI { + #[derive(parse())] + //~^ ERROR traits in `#[derive(...)]` don't accept arguments + //~| ERROR cannot find derive macro `parse` in this scope + //~| ERROR cannot find derive macro `parse` in this scope + path: (), + //~^ ERROR `derive` may only be applied to structs, enums and unions +} diff --git a/src/test/ui/malformed/issue-69341-malformed-derive-inert.stderr b/src/test/ui/malformed/issue-69341-malformed-derive-inert.stderr new file mode 100644 index 00000000000..e8f96178d10 --- /dev/null +++ b/src/test/ui/malformed/issue-69341-malformed-derive-inert.stderr @@ -0,0 +1,26 @@ +error: traits in `#[derive(...)]` don't accept arguments + --> $DIR/issue-69341-malformed-derive-inert.rs:4:19 + | +LL | #[derive(parse())] + | ^^ help: remove the arguments + +error: `derive` may only be applied to structs, enums and unions + --> $DIR/issue-69341-malformed-derive-inert.rs:8:5 + | +LL | path: (), + | ^^^^^^^^ + +error: cannot find derive macro `parse` in this scope + --> $DIR/issue-69341-malformed-derive-inert.rs:4:14 + | +LL | #[derive(parse())] + | ^^^^^ + +error: cannot find derive macro `parse` in this scope + --> $DIR/issue-69341-malformed-derive-inert.rs:4:14 + | +LL | #[derive(parse())] + | ^^^^^ + +error: aborting due to 4 previous errors +