From 45cb0b8cc59dbe39b59eef1a85fd38fa88997ccc Mon Sep 17 00:00:00 2001
From: Fangrui Song <i@maskray.me>
Date: Fri, 12 Jan 2018 16:06:39 -0800
Subject: [PATCH] Fix message_handler.cc when range is invalid

---
 src/message_handler.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/message_handler.cc b/src/message_handler.cc
index 1bf6c50e..31c37590 100644
--- a/src/message_handler.cc
+++ b/src/message_handler.cc
@@ -141,7 +141,8 @@ void EmitSemanticHighlighting(QueryDatabase* db,
         // shrinking hack, the contained keywords and primitive types will be
         // highlighted undesiredly.
         auto concise_name = detailed_name.substr(0, detailed_name.find('<'));
-        if (sym.loc.range.start.line <= working_file->index_lines.size()) {
+        if (0 < sym.loc.range.start.line &&
+            sym.loc.range.start.line <= working_file->index_lines.size()) {
           const std::string& line =
               working_file->index_lines[sym.loc.range.start.line - 1];
           sym.loc.range.end.line = sym.loc.range.start.line;