Use a path instead of an ident (and stop manually resolving)

compiler/rustc_hir_analysis/src/errors/precise_captures.rs

@@ -32,6 +32,16 @@ pub struct BadPreciseCapture {
     pub found: String,
 }
 
+#[derive(Diagnostic)]
+#[diag(hir_analysis_precise_capture_self_alias)]
+pub struct PreciseCaptureSelfAlias {
+    #[primary_span]
+    pub span: Span,
+    #[label]
+    pub self_span: Span,
+    pub what: &'static str,
+}
+
 #[derive(Diagnostic)]
 #[diag(hir_analysis_duplicate_precise_capture)]
 pub struct DuplicatePreciseCapture {