From 7c9d0a596961bbb74b5b2c29cc3d8f2608e45d83 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Fri, 17 Jul 2015 11:24:25 +0200
Subject: [PATCH] nix-collect-garbage: Handle ENOENT

Don't barf trying to read a link that just got deleted.

Fixes #575.
---
 src/nix-collect-garbage/nix-collect-garbage.cc | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/nix-collect-garbage/nix-collect-garbage.cc b/src/nix-collect-garbage/nix-collect-garbage.cc
index c8dc9099c..253c0b537 100644
--- a/src/nix-collect-garbage/nix-collect-garbage.cc
+++ b/src/nix-collect-garbage/nix-collect-garbage.cc
@@ -28,7 +28,12 @@ void removeOldGenerations(std::string dir)
         auto type = i.type == DT_UNKNOWN ? getFileType(path) : i.type;
 
         if (type == DT_LNK && canWrite) {
-            auto link = readLink(path);
+            std::string link;
+            try {
+                link = readLink(path);
+            } catch (SysError & e) {
+                if (e.errNo == ENOENT) continue;
+            }
             if (link.find("link") != string::npos) {
                 printMsg(lvlInfo, format("removing old generations of profile %1%") % path);
                 if (deleteOlderThan != "")