From da227e48e9690b90f0487321e7985f4cd82c3c0d Mon Sep 17 00:00:00 2001
From: Maxime Coste <mawww@kakoune.org>
Date: Wed, 23 Aug 2017 18:13:42 +0700
Subject: [PATCH] Fix String::Data copying/moving from self

---
 src/string.cc | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/string.cc b/src/string.cc
index 1ab56481..f14abddb 100644
--- a/src/string.cc
+++ b/src/string.cc
@@ -43,6 +43,9 @@ String::Data::Data(Data&& other) noexcept
 
 String::Data& String::Data::operator=(const Data& other)
 {
+    if (&other == this)
+        return *this;
+
     const size_t new_size = other.size();
     reserve<false>(new_size);
     memcpy(data(), other.data(), new_size+1);
@@ -53,6 +56,9 @@ String::Data& String::Data::operator=(const Data& other)
 
 String::Data& String::Data::operator=(Data&& other) noexcept
 {
+    if (&other == this)
+        return *this;
+
     release();
 
     if (other.is_long())