Segfault in Unittest: Rotary.hugeFilterSequential

[daschuer]

Bug Description

This happens in our Launchpad PPA:

https://launchpadlibrarian.net/770633160/buildlog_ubuntu-oracular-amd64.mixxx_2.6~alpha~178~g61178b6243-1~oracular_BUILDING.txt.gz

test 615
        Start 615: Rotary.hugeFilterSequential

615: Test command: /<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/mixxx-test "--gtest_filter=Rotary.hugeFilterSequential" "--logLevel" "info"
615: Working Directory: /<<PKGBUILDDIR>>
615: Environment variables: 
615:  QT_QPA_PLATFORM=offscreen
615: Test timeout computed to be: 1500
615: Note: Google Test filter = Rotary.hugeFilterSequential
615: [==========] Running 1 test from 1 test suite.
615: [----------] Global test environment set-up.
615: [----------] 1 test from Rotary
615: [ RUN      ] Rotary.hugeFilterSequential

Test #615: Rotary.hugeFilterSequential ...........................................................................***Exception: SegFault  0.22 sec
Note: Google Test filter = Rotary.hugeFilterSequential
[==========] Running 1 test from 1 test suite.
[----------] Global test environment set-up.
[----------] 1 test from Rotary
[ RUN      ] Rotary.hugeFilterSequential

The following tests FAILED:
	615 - Rotary.hugeFilterSequential (SEGFAULT)

Version

2.6

OS

Ubuntu Oracular

[daschuer]

Introduced here: #13968

[Swiftb0y]

I'd need a backtrace. I can't tell whats wrong...

[daschuer]

Ubuntu Plucky is also affected:
https://launchpadlibrarian.net/770841125/buildlog_ubuntu-plucky-amd64.mixxx_2.6~alpha~180~g90e62ad71b-1~plucky_BUILDING.txt.gz

I am not able to create a backtrace, because I am still on Ubuntu Jammy. Can one else reproduce the issue?

[Eve00000]

Can you please explain to interested non-linux users what the problem is?

[daschuer]

I think the issue is a uninitalized variable in our Rotary ring bus. If it has by chance a value not in the allowed range a segfault occours.
This chance happens during the unittets on Launchpad, but may happen on any build on yony traget during runtime. A partystopper if you wish.