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Printing certain PDFs from Firefox results in ghostscript crapping out whilst spamming this:

> D [14/Mar/2017:19:55:24 +0100] [Job 45] **** File has unbalanced q/Q operators (too many Q's) ****

This is using the driver 'Samsung CLP-550N Foomatic/pxlcolor'. Filters run:

> D [14/Mar/2017:19:55:21 +0100] [Job 45] pdftopdf (application/pdf to application/vnd.cups-pdf, cost 66)
> D [14/Mar/2017:19:55:21 +0100] [Job 45] foomatic-rip (application/vnd.cups-pdf to printer/samsung, cost 0)

Printing the file directly via lpr works fine:

> D [14/Mar/2017:20:02:52 +0100] [Job 46] pdftopdf (application/pdf to application/vnd.cups-pdf, cost 66)
> D [14/Mar/2017:20:02:52 +0100] [Job 46] foomatic-rip (application/vnd.cups-pdf to printer/samsung, cost 0)

I'm afraid I'm unable to share the relevant PDF, but I can do more tests as needed.

Hi Pierre,

thank you for reporting this issue and I'm sorry for delay. This issue seems to be ghostscript issue, actually reported and solved in upstream. I'll reassign this issue to David, who can help you with Ghostscript.

Created attachment 1382858 [details]
Upstream patch

Upstream commit which solved the issue (according upstream, I didn't test it). Link http://git.ghostscript.com/?p=ghostpdl.git;a=patch;h=94c5ecffe4bf66cc91108d99a802c7c2d3b86e0b

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2018:3064