identify from imagemagick breaks with latest ghostscript 9.26

[Skully]

Description: Ubuntu 16.04.5 LTS
Release: 16.04

imagemagick:
  Installed: 8:6.8.9.9-7ubuntu5.13
  Candidate: 8:6.8.9.9-7ubuntu5.13

ghostscript:
  Installed: 9.26~dfsg+0-0ubuntu0.16.04.1
  Candidate: 9.26~dfsg+0-0ubuntu0.16.04.1

Following command gives trouble:

> identify -format '%wx%h,%[exif:orientation]' 'test.pdf[0]'

which results in

> identify: FailedToExecuteCommand `"gs" -q -dQUIET -dSAFER -dBATCH -dNOPAUSE -dNOPROMPT .....

The commands:
> identify -format '%wx%h,%[exif:orientation]' 'test.pdf'

and

> identify 'test.pdf[0]'

are working but not the combination of both.

After downgrading ghostscript to version 9.18 (9.18~dfsg~0-0ubuntu2), all commands are working again.

test.pdf is just some random pdf file on my filesystem.

See
https://bugs.launchpad.net/ubuntu/+source/imagemagick/+bug/1806854

[Till Kamppeter (till-kamppeter)]

Please do not post identical bug reports for each package when you are not sure which package is the culprit. Please add tasks for each package in such a case, as I have done now.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Skully (skully)]

Hmm... have to revert that comment, restart on other machines did not do the trick. Only downgrade to 9.18 seems to work for now.

The complete error message is:

identify: FailedToExecuteCommand `"gs" -q -dQUIET -dSAFER -dBATCH -dNOPAUSE -dNOPROMPT -dMaxBitmap=500000000 -dAlignToPixels=0 -dGridFitTT=2 "-sDEVICE=pngalpha" -dTextAlphaBits=4 -dGraphicsAlphaBits=4 "-r72x72" -dFirstPage=1 -dLastPage=1 "-sOutputFile=/tmp/magick-10621s1dvO7RspXlR%d" "-f/tmp/magick-10621b5cDfJLDPwtD" "-f/tmp/magick-10621kH6YeBIlijBp"' (-1) @ error/delegate.c/ExternalDelegateCommand/461.

[Skully (skully)]

> gs -q -dSAFER -dBATCH -dNOPAUSE -dNOPROMPT -dMaxBitmap=500000000 -dAlignToPixels=0 -dGridFitTT=2 -sDEVICE=pngalpha -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -r72x72 -dFirstPage=1 -dLastPage=1
 sOutputFile=/tmp/test.png -f test.pdf

results in

   **** Error: Appearance dictionary (AP) lacks the mandatory normal (N) appearance.
               Output may be incorrect.
   **** Error: Appearance dictionary (AP) lacks the mandatory normal (N) appearance.
               Output may be incorrect.
Segmentation fault (core dumped)

[Till Kamppeter (till-kamppeter)]

Thank you, can you post an upstream bug report on https://bugs.ghostscript.com/ ? Please post a link to this report here, post your Ghostscript command line from comment #6, and after posting the upstream report, post a link to it into this bug report.

[Till Kamppeter (till-kamppeter)]

This seems to be the same as bug 1806517. Marking this bug as duplicate, no further upstream bug report needed.