From 4d13e6fb8870d11dd3ca40c18a573004496016d0 Mon Sep 17 00:00:00 2001
From: Maxime Coste <frrrwww@gmail.com>
Date: Sun, 4 Sep 2016 11:15:27 +0100
Subject: [PATCH] Do not crash whenever S matches the whole selection and hence
 does not select anything

Fixes #787
---
 src/selectors.cc                      | 3 +++
 test/regression/787-crash-after-S/cmd | 1 +
 test/regression/787-crash-after-S/in  | 0
 test/regression/787-crash-after-S/out | 0
 4 files changed, 4 insertions(+)
 create mode 100644 test/regression/787-crash-after-S/cmd
 create mode 100644 test/regression/787-crash-after-S/in
 create mode 100644 test/regression/787-crash-after-S/out

diff --git a/src/selectors.cc b/src/selectors.cc
index 24319037..d683ce98 100644
--- a/src/selectors.cc
+++ b/src/selectors.cc
@@ -691,6 +691,9 @@ void split_selections(SelectionList& selections, const Regex& regex, unsigned ca
         if (begin.coord() <= sel.max())
             result.push_back(keep_direction({ begin.coord(), sel.max() }, sel));
     }
+    if (result.empty())
+        throw runtime_error("nothing selected");
+
     selections = std::move(result);
 }
 
diff --git a/test/regression/787-crash-after-S/cmd b/test/regression/787-crash-after-S/cmd
new file mode 100644
index 00000000..5b89052b
--- /dev/null
+++ b/test/regression/787-crash-after-S/cmd
@@ -0,0 +1 @@
+S.<ret>
diff --git a/test/regression/787-crash-after-S/in b/test/regression/787-crash-after-S/in
new file mode 100644
index 00000000..e69de29b
diff --git a/test/regression/787-crash-after-S/out b/test/regression/787-crash-after-S/out
new file mode 100644
index 00000000..e69de29b