qos-test fails when built with LTO and gcc-12

Host environment

• Operating system: Arch Linux
• OS/kernel version: Linux foo 5.19.5-arch1-1 #1 SMP PREEMPT_DYNAMIC Mon, 29 Aug 2022 15:51:05 +0000 x86_64 GNU/Linux
• Architecture: x86_64
• QEMU flavor: all
• QEMU version: 7.1.0

Description of problem

The issue is already discussed here [1]. I'm simply building latest QEMU release and running the test suite. I thought the issue was fixed in 7.0 but it has resurfaced. Do QEMU dev's not build with LTO? I'm not able to debug this but I can test any proposed fixes etc. Thanks.

[1] https://lore.kernel.org/all/1d3bbff9e92e7c8a24db9e140dcf3f428c2df103.camel@suse.com/

Steps to reproduce

1. Build QEMU with gcc-12 and LTO enabled
2. Run make check
3. Observe test suite failures in qos-test

Additional information

Summary of Failures:

  2/265 qemu:qtest+qtest-aarch64 / qtest-aarch64/qos-test                  ERROR           0.59s   killed by signal 6 SIGABRT
  3/265 qemu:qtest+qtest-i386 / qtest-i386/qos-test                        ERROR           0.22s   killed by signal 6 SIGABRT
  7/265 qemu:qtest+qtest-x86_64 / qtest-x86_64/qos-test                    ERROR           0.40s   killed by signal 6 SIGABRT