Lately, I've seen quite a few spurious build failures. Random SIGBUS is particularly common, and gcc reports that it cannot reproduce the SIGBUS in a second compilation, which usually points to a kernel/hardware issue.

The latest problem was a hang during a build (on buildvm-armv7-07.arm.fedoraproject.org), with this kernel:

Linux buildvm-armv7-07.arm.fedoraproject.org 4.16.6-302.fc28.armv7hl+lpae #1 SMP Tue May 1 23:15:35 UTC 2018 armv7l armv7l armv7l GNU/Linux

This affects multiple builders, so I suspect a kernel issue, not dying hardware because AFAIK, the machines are independent.

The issue also affects copying out the log files for Koji, so they probably do not show the actual place of the hang.

Thanks,
Florian
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