Comment 20 for bug 1755250

Testing as-is
(remember to clean old images if you have tested the ppa on the same system before)
$ docker system prune -a

... Test steps ...
Step 8/8 : RUN ./test-statx test-file
 ---> Running in 60210feb0c2e
test-file: Operation not permitted
statx(test-file) = -1
The command '/bin/sh -c ./test-statx test-file' returned a non-zero code: 1

Fails as expected

Upgrading to libseccomp2 from proposed
$ sudo apt install libseccomp2/bionic-proposed
Reading package lists... Done
Building dependency tree
Reading state information... Done
Selected version '2.3.1-2.1ubuntu4.1' (Ubuntu:18.04/bionic-proposed [amd64]) for 'libseccomp2'
The following package was automatically installed and is no longer required:
  grub-pc-bin
Use 'sudo apt autoremove' to remove it.
The following additional packages will be installed:
  libseccomp-dev
The following packages will be upgraded:
  libseccomp-dev libseccomp2
2 upgraded, 0 newly installed, 0 to remove and 26 not upgraded.
Need to get 96.9 kB of archives.
After this operation, 15.4 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://archive.ubuntu.com/ubuntu bionic-proposed/main amd64 libseccomp-dev amd64 2.3.1-2.1ubuntu4.1 [57.8 kB]
Get:2 http://archive.ubuntu.com/ubuntu bionic-proposed/main amd64 libseccomp2 amd64 2.3.1-2.1ubuntu4.1 [39.1 kB]
Fetched 96.9 kB in 0s (755 kB/s)
(Reading database ... 102759 files and directories currently installed.)
Preparing to unpack .../libseccomp-dev_2.3.1-2.1ubuntu4.1_amd64.deb ...
Unpacking libseccomp-dev:amd64 (2.3.1-2.1ubuntu4.1) over (2.3.1-2.1ubuntu4) ...
Preparing to unpack .../libseccomp2_2.3.1-2.1ubuntu4.1_amd64.deb ...
Unpacking libseccomp2:amd64 (2.3.1-2.1ubuntu4.1) over (2.3.1-2.1ubuntu4) ...
Setting up libseccomp2:amd64 (2.3.1-2.1ubuntu4.1) ...
Setting up libseccomp-dev:amd64 (2.3.1-2.1ubuntu4.1) ...
Processing triggers for libc-bin (2.27-3ubuntu1) ...
Processing triggers for man-db (2.8.3-2ubuntu0.1) ...

Retest the case:
Step 8/8 : RUN ./test-statx test-file
 ---> Running in 3b7450662773
statx(test-file) = 0
results=fff
  Size: 0 Blocks: 0 IO Block: 4096 regular file
Device: 00:31 Inode: 261790 Links: 1
Access: (0644/-rw-r--r--) Uid: 0 Gid: 0
Access: 2019-02-28 09:38:56.000000000+0000
Modify: 2019-02-28 09:38:56.000000000+0000
Change: 2019-02-28 09:38:56.266396084+0000
 Birth: 2019-02-28 09:38:56.266396084+0000
Attributes: 0000000000000000 (........ ........ ........ ........ ........ ........ ....-... .---.-..)
Removing intermediate container 3b7450662773
 ---> c381bca61860
Successfully built c381bca61860

Thereby setting verified