From df18b44c532f93624b3b76971667a385827cf7cb Mon Sep 17 00:00:00 2001
From: Pat Hickey <pat@moreproductive.org>
Date: Wed, 24 Mar 2021 11:35:20 -0700
Subject: [PATCH] oops

---
 crates/wiggle/test-helpers/examples/tracing.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/crates/wiggle/test-helpers/examples/tracing.rs b/crates/wiggle/test-helpers/examples/tracing.rs
index 63358a4da6..9930f705c0 100644
--- a/crates/wiggle/test-helpers/examples/tracing.rs
+++ b/crates/wiggle/test-helpers/examples/tracing.rs
@@ -27,6 +27,8 @@ witx_literal: "
     errors: { errno => RichError },
 });
 
+impl_errno!(types::Errno);
+
 /// When the `errors` mapping in witx is non-empty, we need to impl the
 /// types::UserErrorConversion trait that wiggle generates from that mapping.
 impl<'a> types::UserErrorConversion for WasiCtx<'a> {