Bug#1086224: RC: Argument " " isn't numeric in division (/) at /usr/share/perl5/GD/SecurityImage/Magick.pm

[Niko Tyni]

On Tue, Oct 29, 2024 at 07:59:25AM +0000, Bastien Roucariès wrote:
> Package: libgd-securityimage-perl
> Version: 1.75-3
> Severity: serious
> Justification: Break transition imagemagick 7
> 
> Dear Maintainer,
> 
> Last autopkgtest for imagemagick7 fail with a lot of message on stderr.

FWIW here's a reduced test script showing the behaviour change in
ImageMagick that seems have caused (at least most?) of this.

  #!/usr/bin/perl

  use Image::Magick;
  my $i = Image::Magick->new;
  $i->Read('null:#ffffff');

  use Data::Dumper;
  my @a = $i->QueryFontMetrics(font => '');

  print Dumper \@a;

This gives a list of thirteen integers on trixie, but
just one undef on sid.

Is this an intentional API change in ImageMagick 7 that GD::SecurityImage
should adapt to, or possibly a regression on the ImageMagick side?

> I suppose a depends on fonts is missing:

Please elaborate. Did ImageMagick 7 change something in (default?) font
handling? I couldn't easily find a summary of the changes.

> Moreinformation here:
> https://ci.debian.net/packages/i/imagemagick/testing/amd64/53694127/

Printing the generated image to the terminal at the end of your
autopkgtest check seems useless and clutters the log BTW.

  https://ci.debian.net/packages/i/imagemagick/testing/amd64/53694127/#L1891

-- 
Niko Tyni   ntyni at debian.org