Public bug reported:
While running the do-release-upgrade I faced the issue. The output from log is
like:
DEBUG quirks: running bionicPostInitialUpdate
DEBUG running Quirks.bionicPostInitialUpdate
DEBUG abort called
After some troubleshooting I found that it was failing on calling 'snap debug
connectivity'.
Snap version I had was a bit old, which caused it to fail with panic on slice
out of range.
Because of the actual error was not logged, it was unable to found the
issue without code debugging.
It would be awesome if you can put more logs into
_checkStoreConnectivity function and log stderr and stdout output from
popen.communicate before calling self.controller.abort()
Also it would be extremely useful to log traceback from abort. Can
simplify the troubleshooting dramatically.
Thanks.
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1810565
Title:
Ubuntu 16.04 to Ubuntu18.04 upgrade fails on snap debug connectivity
without logging any useful logs
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