[Debian-astro-maintainers] Bug#892631: gwcs: FTBFS and Debci failure with Astropy 3.0

[Adrian Bunk]

Source: gwcs
Version: 0.7-2
Severity: serious

https://ci.debian.net/packages/g/gwcs/unstable/amd64/
https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/gwcs.html

...
============================= test session starts ==============================
platform linux -- Python 3.6.4+, pytest-3.3.2, py-1.5.2, pluggy-0.6.0

Running tests with gwcs version 0.7.
Running tests in gwcs docs.

Date: 2019-04-13T02:27:40

Platform: Linux-4.9.0-6-amd64-x86_64-with-debian-buster-sid

Executable: /usr/bin/python3

Full Python Version: 
3.6.4+ (default, Feb 12 2018, 08:25:03) 
[GCC 7.3.0]

encodings: sys: utf-8, locale: ANSI_X3.4-1968, filesystem: ascii
byteorder: little
float info: dig: 15, mant_dig: 15

Numpy: 1.13.3
Scipy: not available
Matplotlib: not available
Pandas: not available
Astropy: 3.0
asdf: 1.3.3
Using Astropy options: remote_data: none.

rootdir: /tmp/gwcs-test-m6yzuy6i/lib/python3.6/site-packages, inifile: setup.cfg
plugins: remotedata-0.2.0, openfiles-0.2.0, doctestplus-0.1.2, arraydiff-0.2
collected 65 items / 1 errors

==================================== ERRORS ====================================
________________ ERROR collecting gwcs/tests/test_separable.py _________________
gwcs/tests/test_separable.py:30: in <module>
    sh1.separable = True
E   AttributeError: can't set attribute
!!!!!!!!!!!!!!!!!!! Interrupted: 1 errors during collection !!!!!!!!!!!!!!!!!!!!
=========================== 1 error in 0.60 seconds ============================
/usr/lib/python3/dist-packages/astropy/config/configuration.py:536: ConfigurationMissingWarning: Configuration defaults will be used due to FileNotFoundError:2 on None
  warn(ConfigurationMissingWarning(msg))
make[1]: *** [debian/rules:26: override_dh_auto_test] Error 2