[Bug 1646607] Re: Imagemagick "Text to Image" -size and -pointsize behavior broken after security fix

[Mathew Hodson]

*** This bug is a duplicate of bug 1646485 ***
    https://bugs.launchpad.net/bugs/1646485

** This bug has been marked a duplicate of bug 1646485
   security update regression in 'convert' tool when creating an image containing a text label

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Title:
  Imagemagick "Text to Image" -size and -pointsize behavior broken after
  security fix

Status in imagemagick package in Ubuntu:
  Confirmed

Bug description:
  There was a USN published on 11/30/16 for several CVEs:
  https://www.ubuntu.com/usn/usn-3142-1/

  I am running imagemagick on Ubuntu 14.04, and consequently was
  upgraded to version 8:6.7.7.10-6ubuntu3.3 via unattended-upgrades.
  However, after this upgrade, I find that behavior for creating images
  from text no longer works.

  This works on 8:6.7.7.10-6ubuntu3:
  ````
  convert -size "126" -font Impact-Regular -fill gray -gravity Center label:"TEST TEXT" /tmp/out.png
  ````

  But on 8:6.7.7.10-6ubuntu3.3 it gives this error:
  ````
  convert -size "126" -font Impact-Regular -fill gray -gravity Center label:"TEST TEXT" /tmp/out.png
  convert.im6: no images defined `/tmp/out.png' @ error/convert.c/ConvertImageCommand/3044.
  ````

  Moreover, using the **exact** command (specifically the 3rd one, where width but not height is specified) in the [Best Fit To Image](https://www.imagemagick.org/Usage/text/#label_bestfit) section of the Imagemagick documentation fail with the same error:
  ````
    convert -background lightblue -fill blue -font Candice \
            -size 160x  label:Anthony     label_size_width.gif
  ````

  Is this a regression introduced by the security update? If so, is
  there a way to fix this?

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