** Description changed:

  The fix:
  https://anonscm.debian.org/git/pbuilder/pbuilder.git/commit/?id=bf1acdc
  
  [Impact]
  
  The remove_packages() function in pbuilder-modules contains:
      if (dpkg -s "$pkg" 2>&1)>/dev/null ; then
  This obviously must
      if ($CHROOTEXEC dpkg -s "$pkg" 2>&1)>/dev/null ; then
  
  This causes remove_packages() to try to remove packages that are not
  present, actually making the function not working at all in some
- circumstances, leading to crashes.
+ circumstances, leading to crashes; or anyway, it causes it to try to
+ remove packages from the chroot even when they are not there.
  
  [Test Case]
  
+ 2 ways:
+ 
+ 1)
   * get a sarge chroot, or anyway around that time
-  * assuming you have pbuilder installed on the host and not in the chroot, 
run:
+  * assuming you have pbuilder installed on the host and not in the chroot,
+    run:
         pbuilder u --removepackages pbuilder
+  * pbuilder crashes
+ 2)
+  * get a regular chroot of something common these days
+  * run `pbuilder u --removepackages pbuilder`
+  * notice how it tries to remove pbuilder from inside the chroot (it
+    shouldn't even try)
  
  [Regression Potential]
  
-  * for yakkety, no potential regression, this is a targetted fix.
+  * for yakkety, no potential regression, this is a targeted fix.

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https://bugs.launchpad.net/bugs/1640892

Title:
  pbuilder: remove_packages() checks for existence in host, not in
  chroot

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