From 24ec7500032c2434e450b7bc3f77ff4c1f12c41c Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Mon, 26 Feb 2018 18:29:40 +0100
Subject: nix run: Fix segfault on macOS

Note that clearenv() is not available on macOS.

Fixes #1907.
---
 src/libutil/util.cc | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'src/libutil/util.cc')

diff --git a/src/libutil/util.cc b/src/libutil/util.cc
index 341dedfdf038..2391e14a94bd 100644
--- a/src/libutil/util.cc
+++ b/src/libutil/util.cc
@@ -73,6 +73,13 @@ std::map<std::string, std::string> getEnv()
 }
 
 
+void clearEnv()
+{
+    for (auto & name : getEnv())
+        unsetenv(name.first.c_str());
+}
+
+
 Path absPath(Path path, Path dir)
 {
     if (path[0] != '/') {
-- 
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