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Observation¶

https://openqa.suse.de/tests/16803497/logfile?filename=autoinst-log.txt from https://openqa.suse.de/tests/16803497 shows

Use of uninitialized value in repeat (x) at /usr/lib/os-autoinst/backend/qemu.pm line 136.
    backend::qemu::_dbus_call(backend::qemu=HASH(0xaaab07fa0dc8), "set_vlan", "tap1", 1) called at /usr/lib/os-autoinst/backend/qemu.pm line 1072
    backend::qemu::start_qemu(backend::qemu=HASH(0xaaab07fa0dc8)) called at /usr/lib/os-autoinst/backend/qemu.pm line 99
    backend::qemu::do_start_vm(backend::qemu=HASH(0xaaab07fa0dc8)) called at /usr/lib/os-autoinst/backend/baseclass.pm line 443
    backend::baseclass::start_vm(backend::qemu=HASH(0xaaab07fa0dc8), undef) called at /usr/lib/os-autoinst/backend/baseclass.pm line 81
    backend::baseclass::handle_command(backend::qemu=HASH(0xaaab07fa0dc8), HASH(0xaaab063ae958)) called at /usr/lib/os-autoinst/backend/baseclass.pm line 616
    backend::baseclass::check_socket(backend::qemu=HASH(0xaaab07fa0dc8), IO::Handle=GLOB(0xaaab0633e2b0)) called at /usr/lib/os-autoinst/backend/qemu.pm line 1199
    backend::qemu::check_socket(backend::qemu=HASH(0xaaab07fa0dc8), IO::Handle=GLOB(0xaaab0633e2b0), 0) called at /usr/lib/os-autoinst/backend/baseclass.pm line 286
    backend::baseclass::do_capture(backend::qemu=HASH(0xaaab07fa0dc8), undef, 1739786164.81989) called at /usr/lib/os-autoinst/backend/baseclass.pm line 312
    eval {...} called at /usr/lib/os-autoinst/backend/baseclass.pm line 313
    backend::baseclass::run_capture_loop(backend::qemu=HASH(0xaaab07fa0dc8)) called at /usr/lib/os-autoinst/backend/baseclass.pm line 135
    backend::baseclass::run(backend::qemu=HASH(0xaaab07fa0dc8), 14, 17) called at /usr/lib/os-autoinst/backend/driver.pm line 68
    backend::driver::__ANON__(Mojo::IOLoop::ReadWriteProcess=HASH(0xaaab0768e3c8)) called at /usr/lib/perl5/vendor_perl/5.26.1/Mojo/IOLoop/ReadWriteProcess.pm line 329
    eval {...} called at /usr/lib/perl5/vendor_perl/5.26.1/Mojo/IOLoop/ReadWriteProcess.pm line 329
    Mojo::IOLoop::ReadWriteProcess::_fork(Mojo::IOLoop::ReadWriteProcess=HASH(0xaaab0768e3c8), CODE(0xaaab07af3338)) called at /usr/lib/perl5/vendor_perl/5.26.1/Mojo/IOLoop/ReadWriteProcess.pm line 493
    Mojo::IOLoop::ReadWriteProcess::start(Mojo::IOLoop::ReadWriteProcess=HASH(0xaaab0768e3c8)) called at /usr/lib/os-autoinst/backend/driver.pm line 72
    backend::driver::start(backend::driver=HASH(0xaaab07872638)) called at /usr/lib/os-autoinst/backend/driver.pm line 37
    backend::driver::new("backend::driver", "qemu") called at /usr/lib/os-autoinst/OpenQA/Isotovideo/Backend.pm line 14
    OpenQA::Isotovideo::Backend::new("OpenQA::Isotovideo::Backend") called at /usr/lib/os-autoinst/OpenQA/Isotovideo/Runner.pm line 110
    OpenQA::Isotovideo::Runner::create_backend(OpenQA::Isotovideo::Runner=HASH(0xaaaafedc7730)) called at /usr/lib/os-autoinst/OpenQA/Isotovideo/Runner.pm line 252
    OpenQA::Isotovideo::Runner::init(OpenQA::Isotovideo::Runner=HASH(0xaaaafedc7730)) called at /usr/bin/isotovideo line 184
    eval {...} called at /usr/bin/isotovideo line 192

Find potentially more information in original ticket #177381

Reproducible¶

Fails since (at least) Build 17.5.99_hpc-node

Expected result¶

Last good: 17.5.98_hpc-node (or more recent)
which does not show the above stacktrace

Acceptance criteria¶

• AC1: No internal error with stack trace from observation

Suggestions¶

• Analyze how we could reach this code and prevent the internal error, e.g. ensure proper calls from higher layers, catch exception, etc.

Out of scope¶

The original test failure does not necessarily need to be fixed as part of this ticket. That will be handled in #177381

Further details¶

Always latest result in this scenario: latest