fakeroot test hangs on launchpad builder

[Shengjing Zhu]

The version 1.35 build succesfully on Debian and my local machine, but hangs on launchpad builder.

https://launchpad.net/ubuntu/+source/fakeroot/1.35-1/+build/28520045/+files/buildlog_ubuntu-oracular-amd64.fakeroot_1.35-1_BUILDING.txt.gz

/usr/bin/make check-TESTS
make[4]: Entering directory '/<<PKGBUILDDIR>>/obj-sysv/test'
make[5]: Entering directory '/<<PKGBUILDDIR>>/obj-sysv/test'
E: Build killed with signal TERM after 150 minutes of inactivity
--------------------------------------------------------------------------------
Build finished at 2024-06-06T20:25:24Z

Started 14 hours ago
Finished 11 hours ago (took 2 hours, 31 minutes, 39.0 seconds)

[Flo H (cbix)]

Likely related, since 1.35 fakeroot hangs for several minutes when run inside a docker container.

[Shengjing Zhu (zhsj)]

It happens on jammy kernel, which launchpad builder uses. So likely you are running docker on some old kernels.

I think it happens when the kernel doesn't implemented close_range syscall.

However I haven't figured out why calling close_range will cause the process to hang.

More interestingly, I find the faked process becomes zombie state when run inside a subshell, as the fakeroot tests use.