Bug#616577: Upgrading libpango1.0-0 fails: rm: cannot remove `/usr/share/doc/libpango1.0-0': Is a directory

[Alexander Kurtz]

Package: libpango1.0-0
Version: 1.28.3-4
Severity: serious
Justification: Fails to install

Hi,

upgrading libpango1.0-0 from 1.28.3-1+squeeze2 (Squeeze) to 1.28.3-4
(experimental) fails:

	$ sudo apt-get install libpango1.0-0=1.28.3-4
	Reading package lists... Done
	Building dependency tree       
	Reading state information... Done
	The following packages were automatically installed and are no longer required:
	  libxcb-render-util0 libpango1.0-common
	Use 'apt-get autoremove' to remove them.
	Suggested packages:
	  ttf-japanese-gothic ttf-japanese-mincho ttf-thryomanes ttf-baekmuk ttf-arphic-gbsn00lp ttf-arphic-bsmi00lp ttf-arphic-gkai00mp ttf-arphic-bkai00mp
	The following packages will be upgraded:
	  libpango1.0-0
	1 upgraded, 0 newly installed, 0 to remove and 847 not upgraded.
	34 not fully installed or removed.
	Need to get 0 B/409 kB of archives.
	After this operation, 131 kB of additional disk space will be used.
	(Reading database ... 207505 files and directories currently installed.)
	Preparing to replace libpango1.0-0 1.28.3-1+squeeze2 (using .../libpango1.0-0_1.28.3-4_i386.deb) ...
	rm: cannot remove `/usr/share/doc/libpango1.0-0': Is a directory
	dpkg: error processing /var/cache/apt/archives/libpango1.0-0_1.28.3-4_i386.deb (--unpack):
	 subprocess new pre-installation script returned error exit status 1
	configured to not write apport reports
		                              Errors were encountered while processing:
	 /var/cache/apt/archives/libpango1.0-0_1.28.3-4_i386.deb
	E: Sub-process /usr/bin/dpkg returned an error code (1)
	$

Looking at the pre-installation script reveals this:

	$ cat libpango1.0-0_1.28.3-4_amd64/DEBIAN/preinst 
	#!/bin/sh
	set -e

	if [ "$1" = "upgrade" ] && dpkg --compare-versions "$2" lt-nl 1.28.3-4; then
	    rm -f /usr/share/doc/libpango1.0-0
	fi


	$

It seems that rm is missing the -r option. After manually removing the
directory everything works fine:

	$ sudo rmdir /usr/share/doc/libpango1.0-0
	$

Best regards

Alexander Kurtz
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