From 29ab42149cf0f5c9cb629878cb29417fd9f298cc Mon Sep 17 00:00:00 2001
From: Maxime Coste <frrrwww@gmail.com>
Date: Sat, 26 Oct 2013 18:46:21 +0100
Subject: [PATCH] Keep does nothing if an empty regex is entered (rather than
 crashing)

---
 src/normal.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/normal.cc b/src/normal.cc
index 7f2c95687..004745444 100644
--- a/src/normal.cc
+++ b/src/normal.cc
@@ -542,6 +542,8 @@ void keep(Context& context, int)
 {
     constexpr const char* prompt = matching ? "keep matching:" : "keep not matching:";
     regex_prompt(context, prompt, [](const Regex& ex, Context& context) {
+        if (ex.empty())
+            return;
         Editor& editor = context.editor();
         const Buffer& buffer = context.buffer();
         SelectionList keep;