From f6276a2c2b76c54c3a659d5fee5557c7bec95a0c Mon Sep 17 00:00:00 2001
From: Vladislav Shchapov <vladislav@shchapov.ru>
Date: Wed, 22 Mar 2023 23:34:59 +0500
Subject: [PATCH] Force use a signed char (On ARM char is unsigned by default)
 (#3362)

Signed-off-by: Vladislav Shchapov <vladislav@shchapov.ru>
---
 test/chrono-test.cc | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/test/chrono-test.cc b/test/chrono-test.cc
index c7edaff2b185..8e2772fa0f63 100644
--- a/test/chrono-test.cc
+++ b/test/chrono-test.cc
@@ -820,9 +820,10 @@ TEST(chrono_test, cpp20_duration_subsecond_support) {
                         std::chrono::duration<long long, std::ratio<1, 7>>(1)),
             "00.142857");
 
-  EXPECT_EQ(fmt::format("{:%S}",
-                        std::chrono::duration<char, std::ratio<1, 100>>(0x80)),
-            "-01.28");
+  EXPECT_EQ(
+      fmt::format("{:%S}",
+                  std::chrono::duration<signed char, std::ratio<1, 100>>(0x80)),
+      "-01.28");
 
   EXPECT_EQ(
       fmt::format("{:%M:%S}",