//! Errors emitted by symbol_mangling.
use rustc_errors::{DiagnosticArgValue, IntoDiagnosticArg};
-use rustc_macros::SessionDiagnostic;
+use rustc_macros::Diagnostic;
use rustc_span::Span;
-#[derive(SessionDiagnostic)]
+#[derive(Diagnostic)]
#[diag(symbol_mangling::test_output)]
pub struct TestOutput {
#[primary_span]