From e118b9a1b4b11d06256b8f49a9fdcc37cd1a0fc1 Mon Sep 17 00:00:00 2001
From: Ricardo Abreu <ricardo.abreu@canonical.com>
Date: Mon, 30 Oct 2023 13:55:21 +0200
Subject: [PATCH] [utils] Bind `std::isspace` safely

---
 include/multipass/utils.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/multipass/utils.h b/include/multipass/utils.h
index 56e0a7337f7..bb4ac08cedf 100644
--- a/include/multipass/utils.h
+++ b/include/multipass/utils.h
@@ -242,7 +242,8 @@ class Utils : public Singleton<Utils>
 
 namespace multipass::utils::detail
 {
-inline constexpr auto is_space = static_cast<int (*)(int)>(std::isspace);
+// see https://en.cppreference.com/w/cpp/string/byte/isspace#Notes
+inline constexpr auto is_space = [](unsigned char c) { return std::isspace(c); };
 }
 
 template <typename Str, typename Filter>