This bug has also interesting interaction with reproducing _source_ package. If you take source package and do:
dpkg-source -x pkg.dsc
dpkg-source -b dir
then, depending on umask, you may end up with a different source
package, even though you haven't changed anything. This happens at least
to files in debian/ (debian.tar.xz) for quilt package format.
This affects cases like feeding source package to pbuilder - the output
source package (and its hash in changes file) will be different than the
original source pkg - if original pkg was built with different umask.
IMHO _if_ dpkg-source really must mess with file permissions (of which I
do not agree), it should also normalize them in archives it create.
--
Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab
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