From 260cc42c2f635bafcff3e5aa574528759db52096 Mon Sep 17 00:00:00 2001
From: Krystine Sherwin <93062060+KrystalDelusion@users.noreply.github.com>
Date: Mon, 10 Jun 2024 14:32:42 +1200
Subject: [PATCH] rtlil.cc: Fix decode for empty string

---
 kernel/rtlil.cc | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/kernel/rtlil.cc b/kernel/rtlil.cc
index eb3fc938aef..50e28bba7d0 100644
--- a/kernel/rtlil.cc
+++ b/kernel/rtlil.cc
@@ -337,7 +337,10 @@ std::string RTLIL::Const::decode_string() const
 		}
 		s.append({ch});
 	}
-	return s.substr(s.find_first_not_of('\0'));
+	auto first_char = s.find_first_not_of('\0');
+	if (first_char != std::string::npos)
+		return s.substr(first_char);
+	else return s;
 }
 
 bool RTLIL::Const::is_fully_zero() const