Groups > linux.debian.maint.python > #11166

Bug#916428: autopkgtest-virt-qemu: Fails to set up test environment when run with python3.7

From	Simon McVittie <smcv@debian.org>
Newsgroups	linux.debian.bugs.dist, linux.debian.maint.python
Subject	Bug#916428: autopkgtest-virt-qemu: Fails to set up test environment when run with python3.7
Date	2018-12-15 00:40 +0100
Message-ID	<x55dL-5wM-1@gated-at.bofh.it> (permalink)
References	<x4TZ0-7jx-3@gated-at.bofh.it> <x4U8G-7mW-7@gated-at.bofh.it> <x51aa-3cK-5@gated-at.bofh.it> <x4TZ0-7jx-3@gated-at.bofh.it> <x51aa-3cK-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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On Fri, 14 Dec 2018 at 20:19:00 +0100, Matthias Klose wrote:
> On 14.12.18 12:48, Simon McVittie wrote:
> > On Fri, 14 Dec 2018 at 11:31:02 +0000, Simon McVittie wrote:
> >> tl;dr: autopkgtest-virt-qemu doesn't work with python3.7.
> > 
> > This seems to be caused by using socket.send() (and assuming the entire
> > buffer will be sent in one transaction) instead of socket.sendall().
> > This was always a bug, at least in theory. I don't know why Python 3.7
> > makes it significant in practice when it wasn't previously.
> 
> if you already ran autopkg using 3.7, then that might point out to the recent
> 3.7.2 release candidate 1. changes. At least the timing of the report suggests this.

Well spotted, you are correct. Looking at apt/history.log and the timing
of my uploads, I must have run autopkgtest successfully with virt-qemu
and python3.7 3.7.1-1 while I was preparing flatpak 1.1.1-1.

The correlation with 3.7.2~rc1-1 seems very reliable, but I don't see
anything in the Python 3.7 news that looks like a likely trigger.

To be clear, I think this was always an autopkgtest-virt-qemu bug,
and I don't know why autopkgtest-virt-qemu worked so reliably in the past,
or why it still works with python3.6.

    smcv

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Thread

Bug#916428: autopkgtest-virt-qemu: Fails to set up test environment when run with python3.7 Simon McVittie <smcv@debian.org> - 2018-12-14 12:40 +0100
  Bug#916428: autopkgtest-virt-qemu: Fails to set up test environment when run with python3.7 Simon McVittie <smcv@debian.org> - 2018-12-14 13:00 +0100
    Bug#916428: autopkgtest-virt-qemu: Fails to set up test environment when run with python3.7 Matthias Klose <doko@debian.org> - 2018-12-14 20:30 +0100
      Bug#916428: autopkgtest-virt-qemu: Fails to set up test environment when run with python3.7 Simon McVittie <smcv@debian.org> - 2018-12-15 00:40 +0100

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