Bug#790562: Ghostscript: File has unbalanced q/Q operators (too many Q's)

[support@compress-pdf.co.uk]

package: ghostscript
version: 9.06~dfsg-2

When running ghostscript, the following errors are being generated in
great quantity:
stderr: "   **** File has unbalanced q/Q operators (too many Q's) ****"

resulting in log files filling the disk.

Additionally, kernel soft lockup warnings appear:
kernel:[406101.560749] BUG: soft lockup - CPU#4 stuck for 31s! [gs:21647]


Command being run is:

gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/screen
-dNOPAUSE -dQUIET -dBandBufferSpace=500000000 -dBandSpace=1000000000
-dBATCH -sOutputFile='out.pdf' 'in.pdf'


It may be related to this bug on the ghostscript bug tracker flagged as
resolved:
http://bugs.ghostscript.com/show_bug.cgi?id=694310


Running on:
3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt11-1 (2015-05-24) x86_64 GNU/Linux