Chromium is unable to start after todays snapd upgrade 1.37.4ubuntu0.1 with 'mkdir: cannot create directory '/run/user/0': Permission denied'

[ace28]

Since the last snapd Update 1.37.4ubuntu0.1 chromium is unable to start, because it cannot make mkdir create the (temporary?) folder '/run/user/0'.

If started from command line, chromium returns: Trace/Breakpoint ausgelöst (Speicherabzug geschrieben) (Trace/Breakpoint triggered (Memory Dump written))
If started with sudo it also reports the error message ('mkdir: cannot create directory '/run/user/0': Permission denied').

uname -a
Linux ace28-Aspire-1810TZ 4.4.0-143-generic #169-Ubuntu SMP Thu Feb 7 07:56:51 UTC 2019 i686 i686 i686 GNU/Linux

lsb_release -a
LSB Version: core-9.20160110ubuntu0.2-ia32:core-9.20160110ubuntu0.2-noarch:printing-9.20160110ubuntu0.2-ia32:printing-9.20160110ubuntu0.2-noarch:security-9.20160110ubuntu0.2-ia32:security-9.20160110ubuntu0.2-noarch
Distributor ID: Ubuntu
Description: Ubuntu 16.04.6 LTS
Release: 16.04
Codename: xenial

[ace28 (ace28)]

I hope this is the right place to submit this bug. Thank you for your good work ^^

[Jamie Strandboge (jdstrand)]

Are you perchance running chromium under sudo?

[Samuele Pedroni (pedronis)]

> If started with sudo it also reports the error message ('mkdir: cannot create directory '/run/user/0': Permission denied').

that is mostly expected to fail, it would probably fail even after that detail

> If started from command line, chromium returns: Trace/Breakpoint ausgelöst (Speicherabzug geschrieben) (Trace/Breakpoint triggered (Memory Dump written))

sounds like there is core dump there, that would be a bug in the snap itself, but would need more information

[ace28 (ace28)]

Usually I am not running chromium under sudo.

Where would snap put a core dump?

[Maciej Borzecki (maciek-borzecki)]

It should have been intercepted by systemd. Try running coredumpctl.

[ace28 (ace28)]

/home/ace28/.config/chromium/Crash Reports/ is empty.

Would the files in /snap/chromium/current/snap/ help?

[ace28 (ace28)]

If there is a core dump, where would it reside?

/home/ace28/.config/chromium/Crash Reports/ is empty.

Would the files in /snap/chromium/current/snap/ help?

[ace28 (ace28)]

I am sorry for the repost. I only seem to see the first three comments, but I am getting the mails.

coredumpctl does not find a dump:

ace28@ace28-Aspire-1810TZ:~/Downloads$ coredumpctl
No coredumps found.

[ace28 (ace28)]

After having installed coredumpctl I tried starting chromium under sudo again and got some more output:

ace28@ace28-Aspire-1810TZ:~/Downloads$ sudo chromium
main.go:224: cannot change mount namespace of snap "chromium" according to change mount (/snap/gtk-common-themes/1198/share/icons/Solus /snap/chromium/659/data-dir/icons/Solus none bind,ro 0 0): cannot write to "/snap/gtk-common-themes/1198/share/icons/Solus" because it would affect the host in "/snap"
main.go:224: cannot change mount namespace of snap "chromium" according to change mount (/snap/gtk-common-themes/1198/share/themes/EvoPop-Azure /snap/chromium/659/data-dir/themes/EvoPop-Azure none bind,ro 0 0): cannot write to "/snap/gtk-common-themes/1198/share/themes/EvoPop-Azure" because it would affect the host in "/snap"
main.go:224: cannot change mount namespace of snap "chromium" according to change mount (/snap/gtk-common-themes/1198/share/themes/EvoPop /snap/chromium/659/data-dir/themes/EvoPop none bind,ro 0 0): cannot write to "/snap/gtk-common-themes/1198/share/themes/EvoPop" because it would affect the host in "/snap"
mkdir: cannot create directory '/run/user/0': Permission denied
Trace/Breakpoint ausgelöst
ace28@ace28-Aspire-1810TZ:~/Downloads$ coredumpctl
No coredumps found.

Hope that helps =D

[ace28 (ace28)]

Well, for some reason I can not comprehend, chromium works again. There was no update. Only another reboot.

As I am writing this, chromium is running without the folder /run/user/0 existing.

Hopefully this bug will not appear again. If there is anything I could help with: please let me know.

Thank you for your work and best regards,

ace28

[Launchpad Janitor (janitor)]

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