From a9d4f2b303584c9de26140a511302ac2fdc7c9ad Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Wed, 24 Aug 2016 14:53:33 +0200
Subject: [PATCH] Fix queryPathFromHashPart()
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The inner lambda was returning a SQLite-internal char * rather than a
std::string, leading to Hydra errors liks

  Caught exception in Hydra::Controller::Root->narinfo "path ‘ø˜£â€™ is not in the Nix store at /nix/store/6mvvyb8fgwj23miyal5mdr8ik4ixk15w-hydra-0.1.1234.abcdef/libexec/hydra/lib/Hydra/Controller/Root.pm line 352."
---
 src/libstore/local-store.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libstore/local-store.cc b/src/libstore/local-store.cc
index d3f0c4787..10056f2f1 100644
--- a/src/libstore/local-store.cc
+++ b/src/libstore/local-store.cc
@@ -760,7 +760,7 @@ Path LocalStore::queryPathFromHashPart(const string & hashPart)
 
     Path prefix = storeDir + "/" + hashPart;
 
-    return retrySQLite<Path>([&]() {
+    return retrySQLite<Path>([&]() -> std::string {
         auto state(_state.lock());
 
         auto useQueryPathFromHashPart(state->stmtQueryPathFromHashPart.use()(prefix));