Explicitly mention Self

compiler/rustc_hir_analysis/src/errors/precise_captures.rs

@@ -12,6 +12,16 @@ pub struct ParamNotCaptured {
     pub kind: &'static str,
 }
 
+#[derive(Diagnostic)]
+#[diag(hir_analysis_self_ty_not_captured)]
+#[note]
+pub struct SelfTyNotCaptured {
+    #[primary_span]
+    pub opaque_span: Span,
+    #[label]
+    pub trait_span: Span,
+}
+
 #[derive(Diagnostic)]
 #[diag(hir_analysis_lifetime_not_captured)]
 pub struct LifetimeNotCaptured {