From ab14e19c6171b1f5fb84ae14ebfccb3a3c1c186b Mon Sep 17 00:00:00 2001
From: Julian Andres Klode <julian.klode@canonical.com>
Date: Fri, 10 May 2019 12:14:59 +0200
Subject: Unlock dpkg locks in reverse locking order

We need to unlock in the reverse order of locking in order
to get useful behavior.

LP: #1829860
---
 apt-pkg/deb/debsystem.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apt-pkg/deb/debsystem.cc b/apt-pkg/deb/debsystem.cc
index 5df6c58a1..0c7e9ff39 100644
--- a/apt-pkg/deb/debsystem.cc
+++ b/apt-pkg/deb/debsystem.cc
@@ -153,8 +153,8 @@ bool debSystem::UnLock(bool NoErrors)
       return _error->Error(_("Not locked"));
    if (--d->LockCount == 0)
    {
-      close(d->FrontendLockFD);
       close(d->LockFD);
+      close(d->FrontendLockFD);
       d->LockCount = 0;
    }
    
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