cupsd assert failure: free(): invalid pointer while printing

[Nicolas DERIVE]

Starting a job to a printer through Wifi network, cupsd failed, and network printers discovery (and availability) stopped.

ProblemType: Crash
DistroRelease: Ubuntu 20.04
Package: cups-daemon 2.3.1-9ubuntu1
ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
Uname: Linux 5.4.0-21-generic x86_64
ApportVersion: 2.20.11-0ubuntu26
Architecture: amd64
AssertionMessage: free(): invalid pointer
CasperMD5CheckResult: skip
CupsErrorLog:
 E [10/Apr/2020:00:00:21 +0200] Missing value on line 1204 of /var/cache/cups/job.cache.
 W [10/Apr/2020:09:16:17 +0200] CreateProfile failed: org.freedesktop.ColorManager.AlreadyExists:profile id \'C48x-Series-Gray..\' already exists
 W [10/Apr/2020:09:16:17 +0200] CreateProfile failed: org.freedesktop.ColorManager.AlreadyExists:profile id \'C48x-Series-CMYK..\' already exists
 E [10/Apr/2020:11:31:51 +0200] [Job 196] File \'\' not found
 E [10/Apr/2020:11:34:57 +0200] [Job 197] No destination host name supplied by cups-browsed for printer \"Samsung_C48x_Series_SEC8425199A158D_\", is cups-browsed running?
Date: Fri Apr 10 11:32:38 2020
ExecutablePath: /usr/sbin/cupsd
InstallationDate: Installed on 2019-02-21 (413 days ago)
InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
Lpstat:
 device for C48x-Series: usb://Samsung/C48x%20Series?serial=08GMB8GM5E0076E&interface=1
 device for Samsung_C48x_Series_SEC8425199A158D_: implicitclass://Samsung_C48x_Series_SEC8425199A158D_/
 device for toshiba3505_fernbach1_MacBook_Pro_6_: ///dev/null
 device for TOSHIBA_e_STUDIO2000AC_11689878: dnssd://TOSHIBA%20e-STUDIO2000AC-11689878._ipp._tcp.local/?uuid=1a657c0f-8d51-4514-8e3b-c1c5fffbc672
 device for TOSHIBA_e_STUDIO257_11225681: ipp://MFP11225681.local:631/Print
MachineType: HP HP ProBook 430 G5
Papersize: a4
PpdFiles:
 Samsung_C48x_Series_SEC8425199A158D_: Samsung C48x Series, driverless, cups-filters 1.27.3
 C48x-Series: Samsung C48x Series PS
 TOSHIBA_e_STUDIO257_11225681: TOSHIBA e-STUDIO257, driverless, cups-filters 1.20.2
 TOSHIBA_e_STUDIO2000AC_11689878: e-STUDIO2000AC
ProcAttrCurrent: /usr/sbin/cupsd (enforce)
ProcCmdline: BOOT_IMAGE=/vmlinuz-5.4.0-21-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
ProcEnviron:
 LANG=fr_FR.UTF-8
 PATH=(custom, no user)
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-21-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
Signal: 6
SourcePackage: cups
StacktraceTop:
 __libc_message (action=action@entry=do_abort, fmt=fmt@entry=0x7ffbc76c8285 "%s\n") at ../sysdeps/posix/libc_fatal.c:155
 malloc_printerr (str=str@entry=0x7ffbc76c64ae "free(): invalid pointer") at malloc.c:5347
 _int_free (av=<optimized out>, p=<optimized out>, have_lock=0) at malloc.c:4173
 ?? () from /usr/lib/x86_64-linux-gnu/libcups.so.2
 ippDelete () from /usr/lib/x86_64-linux-gnu/libcups.so.2
Title: cupsd assert failure: free(): invalid pointer
UpgradeStatus: Upgraded to focal on 2020-03-20 (20 days ago)
UserGroups:

dmi.bios.date: 03/12/2018
dmi.bios.vendor: HP
dmi.bios.version: Q85 Ver. 01.02.05
dmi.board.name: 8377
dmi.board.vendor: HP
dmi.board.version: KBC Version 02.2A.00
dmi.chassis.asset.tag: 5CD83304GY
dmi.chassis.type: 10
dmi.chassis.vendor: HP
dmi.modalias: dmi:bvnHP:bvrQ85Ver.01.02.05:bd03/12/2018:svnHP:pnHPProBook430G5:pvr:rvnHP:rn8377:rvrKBCVersion02.2A.00:cvnHP:ct10:cvr:
dmi.product.family: 103C_5336AN HP ProBook
dmi.product.name: HP ProBook 430 G5
dmi.product.sku: 2VQ27ET#ABF
dmi.sys.vendor: HP
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[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #1846334, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.