Bug#222760: dpkg-dev: Bogus warning about md5sum error

[Peter Karlsson <peterk@debian.org>]

Package: dpkg-dev
Version: 1.9.21
Severity: important

Trying to build a package I get this error message reported from
dpkg-source:

   dpkg-source -b cbmlink-0.9.7
  dpkg-source: building cbmlink using existing cbmlink_0.9.7.orig.tar.gz
  dpkg-source: failure: md5sum gave bogus output `'

I can't see why, since md5sum works fine on the file if issued from the
command line:

  $ md5sum cbmlink_0.9.7.orig.tar.gz
  97df5639761cba3d021641d91c96028b  cbmlink_0.9.7.orig.tar.gz

The build directory is mounted over nfs, if that might have anything to do
with it? I did have some problems with unstable dpkg over nfs in bug 205011,
but that was a very different error message (I'm mounting from the same
server, though).

-- System Information
Debian Release: 3.0
Architecture: m68k
Kernel: Linux paholainen 2.2.17 #1 Wed Feb 14 15:03:49 CET 2001 m68k
Locale: LANG=sv, LC_CTYPE=sv_SE.ISO8859-1

Versions of packages dpkg-dev depends on:
ii  binutils                   2.14.90.0.7-3 The GNU assembler, linker and bina
ii  cpio                       2.4.2-39      GNU cpio -- a program to manage ar
ii  make                       3.79.1-14     The GNU version of the "make" util
ii  patch                      2.5.4-11      Apply a diff file to an original
ii  perl [perl5]               5.8.2-2       Larry Wall's Practical Extraction 
ii  perl-modules               5.8.2-2       Core Perl modules.