[Pkg-dkms-maint] Bug#758485: dkms: "sed: -e expression #1, char 6: unknown command: `m'" when installing nvidia

[Laurent Kislaire]

Package: dkms
Version: 2.2.0.3-1.2
Followup-For: Bug #758485

Dear Maintainer,

This also happened to me when dkms installing virtualbox which has 4 modules but no obsolete_module found.
The obsolete_module array ends up with 4 empty strings, leading to sa_mc_o array being not even initialized.
sed "${sa_mc_o[@]}" "$file" > "$temp_dir_name/${file##*/}.new" then translates into
sed /etc/modprobe.d/dkms.conf 
sed: -e expression #1, char 6: unknown command: `m'

I've solved my problem by adding a check for sa_mc_o size before hitting sed

    done

+    (( ${#sa_mc_o[@]} )) || return 0

    # do all the changes at once, record the diffs for posterity
    for file in "$@"; do

Best regards
Laurent

-- System Information:
Debian Release: jessie/sid
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'unstable'), (500, 'stable')
Architecture: i386 (i686)

Kernel: Linux 3.14-2-686-pae (SMP w/4 CPU cores)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages dkms depends on:
ii  build-essential    11.7
ii  coreutils          8.21-1.2
ii  dpkg-dev           1.17.13
ii  gcc                4:4.9.1-3
ii  make               4.0-8
ii  module-init-tools  18-1
ii  patch              2.7.1-6

Versions of packages dkms recommends:
ii  fakeroot               1.20.1-1.1
ii  linux-headers-686-pae  3.14+59
pn  linux-image            <none>
ii  menu                   2.1.47
ii  sudo                   1.8.9p5-1

dkms suggests no packages.

-- Configuration Files:
/etc/modprobe.d/dkms.conf changed:


-- no debconf information