From 0b44c706f31675934eb23e53b5f3388510b884a6 Mon Sep 17 00:00:00 2001
From: Jan Koniarik <veverak@Jans-MacBook-Pro.local>
Date: Fri, 10 Jan 2025 17:47:54 +0100
Subject: [PATCH] explicitly cast diff variable in test_sink

---
 tests/test_sink.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tests/test_sink.h b/tests/test_sink.h
index 529d86dd..c31ec375 100644
--- a/tests/test_sink.h
+++ b/tests/test_sink.h
@@ -47,8 +47,9 @@ protected:
         base_sink<Mutex>::formatter_->format(msg, formatted);
         // save the line without the eol
         auto eol_len = strlen(details::os::default_eol);
+        using diff_t = typename std::iterator_traits<typename memory_buf_t::iterator>::difference_type; 
         if (lines_.size() < lines_to_save) {
-            lines_.emplace_back(formatted.begin(), formatted.end() - eol_len);
+            lines_.emplace_back(formatted.begin(), formatted.end() - static_cast<diff_t>(eol_len));
         }
         msg_counter_++;
         std::this_thread::sleep_for(delay_);