From 568a099c889e7ccc5a49b15575078e99acf8bc2f Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Thu, 13 Apr 2017 15:32:43 +0200
Subject: [PATCH] canonPath(): Check against empty paths

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

diff --git a/src/libutil/util.cc b/src/libutil/util.cc
index a640a64c7..0bd51afd1 100644
--- a/src/libutil/util.cc
+++ b/src/libutil/util.cc
@@ -96,6 +96,8 @@ Path absPath(Path path, Path dir)
 
 Path canonPath(const Path & path, bool resolveSymlinks)
 {
+    assert(path != "");
+
     string s;
 
     if (path[0] != '/')