From 281b8fbb7296c3151577e6d6545e9eb5c1fc6b31 Mon Sep 17 00:00:00 2001
From: Hannes Hauswedell <h2+github.com@fsfe.org>
Date: Fri, 10 May 2019 02:04:50 +0200
Subject: [PATCH] [FIX] workaround concept resolution problem

---
 include/seqan3/io/stream/debug_stream.hpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/seqan3/io/stream/debug_stream.hpp b/include/seqan3/io/stream/debug_stream.hpp
index bda68ca7c27..209602ca46e 100644
--- a/include/seqan3/io/stream/debug_stream.hpp
+++ b/include/seqan3/io/stream/debug_stream.hpp
@@ -298,6 +298,7 @@ namespace seqan3
 template <typename tuple_t>
 //!\cond
     requires !std::ranges::InputRange<tuple_t> &&
+             !OStream<std::ostream, tuple_t> &&    //TODO remove this line when the alphabet concepts are split
              !Alphabet<remove_cvref_t<tuple_t>> && // exclude alphabet_tuple_base
              tuple_like_concept<remove_cvref_t<tuple_t>>
 //!\endcond