Bug#903558: gnome-builder: fails to install with python3.7 supported

[Simon McVittie]

Package: gnome-builder
Version: 3.28.1-1
Severity: grave
Tags: upstream
Justification: renders package uninstallable
Control: block 902788 by -1
Control: block 893189 by -1

> Setting up gnome-builder (3.28.1-1+b1) ...
>   File "/usr/lib/python3/dist-packages/gi/overrides/Ide.py", line 44
>     def DBusMethod(dbus_interface, in_signature=None, out_signature=None, async=False):
>                                                                               ^
> SyntaxError: invalid syntax

This is similar to the other bugs that block #902788. With Python 3.7
on the list of supported Pythons, async is now a reserved keyword that
cannot be used to name identifiers.

Because gnome-builder 3.28.1-1+b1 was rebuilt for the llvm-defaults 6.0
transition, this is also going to block that transition.

    smcv

-- System Information:
Debian Release: buster/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'buildd-unstable'), (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental-debug'), (1, 'buildd-experimental'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.17.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_GB.utf8, LC_CTYPE=en_GB.utf8 (charmap=UTF-8), LANGUAGE=en_GB:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages gnome-builder depends on:
ii  clang                                        1:6.0-41
ii  dconf-gsettings-backend [gsettings-backend]  0.28.0-2
ii  exuberant-ctags                              1:5.9~svn20110310-12
ii  gir1.2-dazzle-1.0                            3.28.1-1
ii  gir1.2-ggit-1.0                              0.26.4-1
ii  gir1.2-glib-2.0                              1.56.1-1
ii  gir1.2-gtk-3.0                               3.22.30-2
ii  gir1.2-gtksource-3.0                         3.24.7-2
ii  gir1.2-json-1.0                              1.4.2-4
ii  gir1.2-peas-1.0                              1.22.0-2
ii  gir1.2-template-1.0                          3.28.0-1
ii  gir1.2-vte-2.91                              0.52.2-1
ii  gir1.2-webkit2-4.0                           2.20.3-1
ii  libatk1.0-0                                  2.28.1-1
ii  libc6                                        2.27-4
ii  libcairo-gobject2                            1.15.10-3
ii  libcairo2                                    1.15.10-3
ii  libclang1-6.0                                1:6.0.1-2
ii  libdazzle-1.0-0                              3.28.1-1
ii  libdevhelp-3-5                               3.28.1-1
ii  libenchant1c2a                               1.6.0-11.1
ii  libflatpak0                                  0.99.3-1
ii  libfontconfig1                               2.13.0-5
ii  libgdk-pixbuf2.0-0                           2.36.11-2
ii  libgirepository-1.0-1                        1.56.1-1
ii  libgit2-glib-1.0-0                           0.26.4-1
ii  libglib2.0-0                                 2.56.1-2
ii  libgspell-1-1                                1.6.1-1
ii  libgtk-3-0                                   3.22.30-2
ii  libgtksourceview-3.0-1                       3.24.7-2
ii  libjson-glib-1.0-0                           1.4.2-4
ii  libjsonrpc-glib-1.0-1                        3.28.0-2
ii  libpango-1.0-0                               1.42.1-2
ii  libpangocairo-1.0-0                          1.42.1-2
ii  libpangoft2-1.0-0                            1.42.1-2
ii  libpcre3                                     2:8.39-9
ii  libpeas-1.0-0                                1.22.0-2
ii  libsoup2.4-1                                 2.62.2-2
ii  libtemplate-glib-1.0-0                       3.28.0-1
ii  libvala-0.40-0                               0.40.7-1
ii  libvala-0.40-dev                             0.40.7-1
ii  libvte-2.91-0                                0.52.2-1
ii  libwebkit2gtk-4.0-37                         2.20.3-1
ii  libxml2                                      2.9.4+dfsg1-7+b1
ii  python3                                      3.6.6-1
ii  python3-gi                                   3.28.2-1+b1
ii  sysprof                                      3.28.1-1
ii  valac-0.40-vapi                              0.40.7-1

Versions of packages gnome-builder recommends:
ii  autoconf          2.69-11
ii  autoconf-archive  20170928-2
ii  automake          1:1.15.1-3.1
ii  autopoint         0.19.8.1-6
ii  build-essential   12.5
ii  flatpak-builder   0.99.3-1
ii  gettext           0.19.8.1-6+b1
ii  intltool          0.51.0-5
ii  libtool           2.4.6-2.1
ii  meson             0.47.0-1
ii  pkg-config        0.29-4+b1
ii  python3-jedi      0.12.0-1
ii  python3-lxml      4.2.1-1+b1
ii  valgrind          1:3.13.0-2+b1

gnome-builder suggests no packages.

-- no debconf information