I investigated this problem and came up with a solution which I think is sensible. I submitted the fix as a pull-request to upstream, which can be seen here:
https://github.com/phpmyadmin/sql-parser/pull/312 I was not able to pinpoint the exact reason this problem manifests itself only on s390x, but in theory it could also happen in other architectures, because it's an issue with the way the code deals with reading input from stdin while marking it as non-blocking as well. The approach I decided to take was to rewrite the function that reads input and use stream_select (which is just a wrapper for select(2)) but keep stdin as blocking. Then, with the help of select's timeout mechanism, we're still able to not block while reading input. At the time of this writing, upstream, hasn't had the chance to review the approach yet. However, because of the upcoming feature freeze, I think it's OK for us to go ahead and apply this patch to unblock phpmyadmin-sql-parser and other packages in the proposed queue. I'm attaching a debdiff with the proposed fix. There's also a PPA with the build here: https://launchpad.net/~sergiodj/+archive/ubuntu/phpmyadmin-sql-parser- ftbfs Last, but not least, I ran autopkgtest and everything passes. ** Patch added: "fix-ftbfs-autopkgtest-non-blocking-stdin.patch" https://bugs.launchpad.net/phpmyadmin-sql-parser/+bug/1890341/+attachment/5404959/+files/fix-ftbfs-autopkgtest-non-blocking-stdin.patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1890341 Title: Intermittent autopkgtest failure with testStdinPipe (s390x) To manage notifications about this bug go to: https://bugs.launchpad.net/phpmyadmin-sql-parser/+bug/1890341/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
