From 75cd75b1ae3d32267ec5b92f7e047dc9ea33f075 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Wed, 18 Oct 2017 15:41:14 +0200
Subject: [PATCH] Errors writing to the NAR cache should not be fatal

---
 src/libstore/remote-fs-accessor.cc | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/libstore/remote-fs-accessor.cc b/src/libstore/remote-fs-accessor.cc
index 939691204..ba9620a17 100644
--- a/src/libstore/remote-fs-accessor.cc
+++ b/src/libstore/remote-fs-accessor.cc
@@ -19,9 +19,13 @@ Path RemoteFSAccessor::makeCacheFile(const Path & storePath)
 
 void RemoteFSAccessor::addToCache(const Path & storePath, const std::string & nar)
 {
-    if (cacheDir != "")
+    try {
+        if (cacheDir == "") return;
         /* FIXME: do this asynchronously. */
         writeFile(makeCacheFile(storePath), nar);
+    } catch (...) {
+        ignoreException();
+    }
 }
 
 std::pair<ref<FSAccessor>, Path> RemoteFSAccessor::fetch(const Path & path_)