error[E0277]: the trait bound `NotIntoDiagnosticArg: IntoDiagnosticArg` is not satisfied --> $DIR/diagnostic-derive-doc-comment-field.rs:37:10 | LL | #[derive(Diagnostic)] | ---------- required by a bound introduced by this call ... LL | arg: NotIntoDiagnosticArg, | ^^^^^^^^^^^^^^^^^^^^ the trait `IntoDiagnosticArg` is not implemented for `NotIntoDiagnosticArg` | = help: normalized in stderr note: required by a bound in `DiagnosticBuilder::<'a, G>::set_arg` --> $COMPILER_DIR/rustc_errors/src/diagnostic_builder.rs:LL:CC = note: this error originates in the macro `forward` (in Nightly builds, run with -Z macro-backtrace for more info) error[E0277]: the trait bound `NotIntoDiagnosticArg: IntoDiagnosticArg` is not satisfied --> $DIR/diagnostic-derive-doc-comment-field.rs:47:10 | LL | #[derive(Subdiagnostic)] | ------------- required by a bound introduced by this call ... LL | arg: NotIntoDiagnosticArg, | ^^^^^^^^^^^^^^^^^^^^ the trait `IntoDiagnosticArg` is not implemented for `NotIntoDiagnosticArg` | = help: normalized in stderr note: required by a bound in `Diagnostic::set_arg` --> $COMPILER_DIR/rustc_errors/src/diagnostic.rs:LL:CC error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0277`.