(I confirmed by bind mount shenanigans that putting the libgcc_s.so.1 from the core snapd into the snapd snap makes this work)
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to openssh in Ubuntu. https://bugs.launchpad.net/bugs/1943077 Title: snapd fails to autopkgtest on mksquashfs, which is looking for libgcc_s Status in snapd: New Status in openssh package in Ubuntu: New Status in squashfs-tools package in Ubuntu: New Bug description: During current snapd autopkgtest, a failure can be observed: https://autopkgtest.ubuntu.com/results/autopkgtest- impish/impish/amd64/s/snapd/20210907_175258_5451b@/log.gz error: cannot pack "/home/gopath/src/github.com/snapcore/snapd/tests/smoke/sandbox/test-snapd-sandbox": mksquashfs call failed: ----- libgcc_s.so.1 must be installed for pthread_cancel to work Parallel mksquashfs: Using 1 processor Creating 4.0 filesystem on /home/gopath/src/github.com/snapcore/snapd/tests/smoke/sandbox/test-snapd-sandbox/test-snapd-sandbox_1.0_all.snap, block size 131072. ----- error: cannot read snap file: "/var/lib/snapd/snaps/.local-install-136125945" is not a snap or snapdir I traced the underlying call to the following: "/snap/snapd/current/lib/x86_64-linux-gnu/ld-2.23.so" "--library-path" "/snap/snapd/current/usr/local/lib:/snap/snapd/current/lib/x86_64-linux-gnu:/snap/snapd/current/usr/lib/x86_64-linux-gnu" "/snap/snapd/current/usr/bin/mksquashfs" asdf asdf.squashfs (the real call has more arguments, this is a simplified version that produces the failure) To observe this, one can create a VM based a cloud image from https://cloud-images.ubuntu.com/impish/current, then run the above command in the resulting environment. Doing so will test against snapd v2.51.4 (12883). Retesting with edge 2.52+git635.gada2d87 (13323) produces an equivalent result. Running a more bland `/snap/snapd/current/usr/bin/mksquashfs asdf asdf.squashfs` without messing with library paths has mksquashfs behaving as expected. Also, getting a v2.51.3 snapd seems to behave itself. Updating from 2.51.3 -> 2.51.4 also works. One can see a passing mksquashfs by taking libgcc_s.so.1 from hirsute and placing it in the library path for the above call. In the working scenario, it appears that libgcc_s is being obtained from outside of /snap (and also libz). In the failing scenario, this external copy of libgcc_s is not being loaded (per gdb info sharedlibrary), but libz still is. To manage notifications about this bug go to: https://bugs.launchpad.net/snapd/+bug/1943077/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
