From e9e9b639fbbf500866ec1814dee6b504bcb99f3d Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Mon, 19 Dec 2022 20:08:13 +0200
Subject: [PATCH] Refuse to create an empty data pack

This avoids a segfault from trying to access te front element of an
empty list.
---
 source/datatool.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/source/datatool.cpp b/source/datatool.cpp
index ca2f2e4..d23c00d 100644
--- a/source/datatool.cpp
+++ b/source/datatool.cpp
@@ -37,6 +37,8 @@ Target *DataTool::create_target(const list<Target *> &sources, const string &arg
 	}
 	else if(arg=="pack")
 	{
+		if(sources.empty())
+			throw invalid_argument("DataTool::create_target");
 		list<FileTarget *> files;
 		for(Target *t: sources)
 			files.push_back(&dynamic_cast<FileTarget &>(*t));
-- 
2.45.2