From a1d5ddea5b7db00548173cee8236aaad61cf5961 Mon Sep 17 00:00:00 2001
From: Colin Watson <cjwatson@debian.org>
Date: Sat, 18 May 2013 23:13:09 +0100
Subject: Resolve mount point symlinks relative to the target chroot before
 unmounting them (closes: #702861, #703037, #704744).

---
 debian/changelog | 2 ++
 functions        | 5 ++++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/debian/changelog b/debian/changelog
index 9400489..d478a60 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -5,6 +5,8 @@ debootstrap (1.0.51) UNRELEASED; urgency=low
 
   [ Colin Watson ]
   * Clarify location of pkgdetails.c in error message (closes: #708771).
+  * Resolve mount point symlinks relative to the target chroot before
+    unmounting them (closes: #702861, #703037, #704744).
 
  -- Colin Watson <cjwatson@debian.org>  Sat, 18 May 2013 22:35:11 +0100
 
diff --git a/functions b/functions
index e5e16a3..a2e1431 100644
--- a/functions
+++ b/functions
@@ -955,8 +955,11 @@ setup_etc () {
 UMOUNT_DIRS=
 
 umount_exit_function () {
+	local realdir
 	for dir in $UMOUNT_DIRS; do
-		( cd / ; umount "$TARGET/${dir#/}" ) || true
+		realdir="$(in_target_nofail readlink -f "$dir")"
+		[ "$realdir" ] || continue
+		( cd / ; umount "$TARGET/${realdir#/}" ) || true
 	done
 }
 
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