cups crashes when trying to print double-sided

[Daniel Mezhiborsky]

cups fails to print, makes the printer unavailable ("backend failure"), and subsequently reports a crash when trying to print double-sided to a networked printer.

This behavior does not occur with the proprietary driver.Brother MFC-L2750DW, network.

Daniel

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: cups 2.2.12-2ubuntu1
ProcVersionSignature: Ubuntu 5.3.0-13.14-generic 5.3.0
Uname: Linux 5.3.0-13-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair nvidia_modeset nvidia wl
ApportVersion: 2.20.11-0ubuntu7
Architecture: amd64
CupsErrorLog:
 W [07/Oct/2019:05:32:45 -0400] CreateProfile failed: org.freedesktop.ColorManager.AlreadyExists:profile id \'Brother_MFC_L2750DW_series-Gray..\' already exists
 W [07/Oct/2019:05:32:45 -0400] CreateProfile failed: org.freedesktop.ColorManager.AlreadyExists:profile id \'Brother_MFC_L2750DW_series-DeviceN..\' already exists
CurrentDesktop: ubuntu:GNOME
Date: Mon Oct 7 06:34:05 2019
InstallationDate: Installed on 2019-10-02 (5 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
Lpstat:
 device for Brother_MFC_L2750DW_series: implicitclass://brother_mfc_l2750dw_series/
 device for MFCL2750DW: dnssd://Brother%20MFC-L2750DW%20series._ipp._tcp.local/?uuid=e3248000-80ce-11db-8000-3c2af46cd663
MachineType: To be filled by O.E.M. To be filled by O.E.M.
Papersize: letter
PpdFiles:
 Brother_MFC_L2750DW_series: MFC-L2750DW series - IPP Everywhere
 MFCL2750DW: Brother MFCL2750DW for CUPS
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.3.0-13-generic root=UUID=29ce6912-3799-4448-863e-a29337317010 ro quiet splash vt.handoff=7
SourcePackage: cups
UpgradeStatus: Upgraded to eoan on 2019-10-06 (0 days ago)
dmi.bios.date: 04/03/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 2501
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: M5A99X EVO R2.0
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr2501:bd04/03/2014:svnTobefilledbyO.E.M.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnASUSTeKCOMPUTERINC.:rnM5A99XEVOR2.0:rvrRev1.xx:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: To be filled by O.E.M.
dmi.product.sku: SKU
dmi.product.version: To be filled by O.E.M.
dmi.sys.vendor: To be filled by O.E.M.