From 04cfcc1dc2d2d637ec957ff47618fd73952e8d57 Mon Sep 17 00:00:00 2001
From: mirmik <mirmikns@yandex.ru>
Date: Wed, 20 Jul 2022 22:33:30 +0300
Subject: [PATCH] Add missed header. (#1464)

It fix failed build for me.
---
 common/error.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/common/error.h b/common/error.h
index be3361b328d3..403befc461dd 100644
--- a/common/error.h
+++ b/common/error.h
@@ -6,6 +6,7 @@
 #define CARBON_COMMON_ERROR_H_
 
 #include <string>
+#include <variant>
 
 #include "common/check.h"
 #include "common/ostream.h"