Diagnose empty selection desc string

Fixes #690

1 files changed, 3 insertions, 0 deletions

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));