From e2bfd9e3b22e41b1f0e95bbe5e2e383f44a15685 Mon Sep 17 00:00:00 2001
From: Maxime Coste <frrrwww@gmail.com>
Date: Mon, 6 Jun 2016 17:17:18 +0100
Subject: [PATCH] Diagnose empty selection desc string

Fixes #690
---
 src/selection.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/selection.cc b/src/selection.cc
index ee849bc4..81d2c051 100644
--- a/src/selection.cc
+++ b/src/selection.cc
@@ -594,6 +594,9 @@ Selection selection_from_string(StringView desc)
 
 SelectionList selection_list_from_string(Buffer& buffer, StringView desc)
 {
+    if (desc.empty())
+        throw runtime_error{"empty selection description"};
+
     Vector<Selection> sels;
     for (auto sel_desc : desc | split<StringView>(':'))
         sels.push_back(selection_from_string(sel_desc));