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-rw-r--r--src/libstore/gc.cc6
1 files changed, 3 insertions, 3 deletions
diff --git a/src/libstore/gc.cc b/src/libstore/gc.cc
index 7d3da1cc8..842980fb7 100644
--- a/src/libstore/gc.cc
+++ b/src/libstore/gc.cc
@@ -870,11 +870,11 @@ void LocalStore::collectGarbage(const GCOptions & options, GCResults & results)
void LocalStore::autoGC(bool sync)
{
- static auto fakeFreeSpaceFile = getEnv("_NIX_TEST_FREE_SPACE_FILE", "");
+ static auto fakeFreeSpaceFile = getEnv("_NIX_TEST_FREE_SPACE_FILE");
auto getAvail = [this]() -> uint64_t {
- if (!fakeFreeSpaceFile.empty())
- return std::stoll(readFile(fakeFreeSpaceFile));
+ if (fakeFreeSpaceFile)
+ return std::stoll(readFile(*fakeFreeSpaceFile));
struct statvfs st;
if (statvfs(realStoreDir.c_str(), &st))