[Bug 1943008] Re: squashfs-tools: needs to depend on libgcc-s1

[Dan Bungert]

For the snapd autopkgtest problem, you are correct and that changes have
been committed for the snapd snapcraft file to include libgcc.

The dependency is also correct for impish - I spawned a container to
experiment with a system that did not have libgcc-s1.  libgcc-s1 is
Priority: required and attempting to `apt remove libgcc-s1` offers to
remove 61 other essential packages.  Manually removing the library and
running a trivial mksquashfs case does cause an equivalent failure to
the above.  Based on this the dependency looks correct but functionally
redundant.

I have dropped the patch and unsubscribed sponsors, and forwarded the
suggestion to Debian.

** Bug watch added: Debian Bug tracker #994550
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=994550

** Also affects: squashfs-tools (Debian) via
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=994550
   Importance: Unknown
       Status: Unknown

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Title:
  squashfs-tools: needs to depend on libgcc-s1

Status in snapd package in Ubuntu:
  Won't Fix
Status in squashfs-tools package in Ubuntu:
  Confirmed
Status in squashfs-tools package in Debian:
  Unknown

Bug description:
  I'm getting this error running the ADT test for snapd on impish:

  021-09-08 07:49:43 Error executing autopkgtest:adt-local:tests/smoke/sandbox (autopkgtest:adt-local) : 
  -----
  ++ snap debug confinement
  + '[' strict '!=' strict ']'
  + /home/gopath/src/github.com/snapcore/snapd/tests/lib/tools/snaps-state install-local test-snapd-sandbox
  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-443592474"
         is not a snap or snapdir
  -----

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