[Pkg-zsh-devel] Bug#844076: Bug#844076: zsh: FTBFS (failing tests)

[Axel Beckert]

Control: tag -1 + moreinfo upstream

Hi Santiago,

Santiago Vila wrote:
> I tried to build this package in stretch with "dpkg-buildpackage -A"
> (which is what the "Arch: all" autobuilder would do to build it)
> but it failed:
[...]
> Running test: -N cond
> This test takes two seconds...
> Test ../../Test/C02cond.ztst failed: bad status 1, expected 0 from:

Can't reproduce this in a "normal" build.

> The build was made on a QEMU/KVM virtual machine using sbuild and union-type=overlay.
> 
> I'm filing this as "normal" because I believe this to be an artifact
> of using sbuild with overlayfs. The test itself says it may fail
> on NFS.

Sounds similar enough, but I think this possibly a duplicate of
https://bugs.debian.org/764650 (FTBFS with noatime mounts).

> Would this be a bug if we were using NFS instead of sbuild
> with overlayfs?

Probably, since the test suite contains a guard around these tests to
not execute them if running on NFS. In case it's an issue similar to
NFS, maybe we need a guard for overlayfs, too?

> If not, feel free to downgrade to wishlist, but it would be nice if
> this never failed anyway so that I don't have to special-case this
> package in my test builds.

Hrm. A few questions, hopefully leading into the right direction:

* Can you show me the output of "mount" of such an overlayfs mount
  point?

* Does overlayfs support atimes? If not, this the likelyhood that this
  is a duplicate of #764650 is very high. If it supports atimes only
  optionally, can you enable them in your build and see if the issue
  vanishes?

* Can you verify that this failure is deterministic, i.e. do 10 builds
  and see if all of them fail in the same way? (zsh unfortunately has
  a history of occassional non-deterministic and hard to debug test
  suite failures or hangs, see e.g. https://bugs.debian.org/760061)

		Regards, Axel
-- 
 ,''`.  |  Axel Beckert <abe at debian.org>, http://people.debian.org/~abe/
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