Bug#928137: gimp: all Alpha layers are corrupted - vertical bars

[Adrian Siemieniak]

Package: gimp
Version: 2.10.8-2
Severity: important

Dear Maintainer,

   * What led up to the situation?
Probably latest update of beignet and/or gimp broke functionality. This has happened during last two months. Disabling opencl in gimp prefs fixes the issue.

   * What exactly did you do (or not do) that was effective (or
     ineffective)?
Create empty image, use "add layer mask" (can be "full opacity" - it does not matter) - instead of proper mask, I'm getting vertical bars.
It looks like this: http://adrian.siemieniak.net/Rozne/201904-gimperror.png


Additional info:
ii  beignet-dev:amd64                                           1.3.2-6+b10                                             amd64        OpenCL for Intel GPUs (development files and documentation)
ii  beignet-opencl-icd:amd64                                    1.3.2-6+b10                                             amd64        OpenCL library for Intel GPUs
ii  clinfo                                                      2.2.18.04.06-1                                          amd64        Query OpenCL system information
ii  ocl-icd-libopencl1:amd64                                    2.2.12-2                                                amd64        Generic OpenCL ICD Loader
ii  ocl-icd-opencl-dev:amd64                                    2.2.12-2                                                amd64        OpenCL development files
ii  opencl-c-headers                                            2.2~2019.01.17-g49f07d3-1                               all          OpenCL (Open Computing Language) C header files
ii  opencl-clhpp-headers                                        2.0.10+git26-g806646c-1                                 all          C++ headers for OpenCL development
ii  opencl-headers                                              2.2~2019.01.17-g49f07d3-1                               all          OpenCL (Open Computing Language) header files


-- System Information:
Debian Release: 10.0
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 5.0.9 (SMP w/4 CPU cores)
Kernel taint flags: TAINT_OOT_MODULE
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968) (ignored: LC_ALL set to C), LANGUAGE=C (charmap=ANSI_X3.4-1968) (ignored: LC_ALL set to C)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages gimp depends on:
ii  gimp-data            2.10.8-2
ii  libaa1               1.4p5-46
ii  libbabl-0.1-0        0.1.62-1
ii  libbz2-1.0           1.0.6-9
ii  libc6                2.28-9
ii  libcairo2            1.16.0-4
ii  libfontconfig1       2.13.1-2
ii  libfreetype6         2.9.1-3
ii  libgcc1              1:8.3.0-6
ii  libgdk-pixbuf2.0-0   2.38.1+dfsg-1
ii  libgegl-0.4-0        0.4.14-1
ii  libgexiv2-2          0.10.9-1
ii  libgimp2.0           2.10.8-2
ii  libglib2.0-0         2.58.3-1
ii  libgs9               9.27~dfsg-2
ii  libgtk2.0-0          2.24.32-3
ii  libgudev-1.0-0       232-2
ii  libharfbuzz0b        2.3.1-1
ii  libheif1             1.3.2-1+b1
ii  libilmbase23         2.2.1-2
ii  libjpeg62-turbo      1:1.5.2-2+b1
ii  liblcms2-2           2.9-3
ii  liblzma5             5.2.4-1
ii  libmng1              1.0.10+dfsg-3.1+b5
ii  libmypaint-1.3-0     1.3.0-2.1
ii  libopenexr23         2.2.1-4.1
ii  libopenjp2-7         2.3.0-2
ii  libpango-1.0-0       1.42.4-6
ii  libpangocairo-1.0-0  1.42.4-6
ii  libpangoft2-1.0-0    1.42.4-6
ii  libpng16-16          1.6.36-6
ii  libpoppler-glib8     0.71.0-3
ii  librsvg2-2           2.44.10-2
ii  libstdc++6           8.3.0-6
ii  libtiff5             4.0.10-4
ii  libwebp6             0.6.1-2
ii  libwebpdemux2        0.6.1-2
ii  libwebpmux3          0.6.1-2
ii  libwmf0.2-7          0.2.8.4-14
ii  libx11-6             2:1.6.7-1
ii  libxcursor1          1:1.1.15-2
ii  libxext6             2:1.3.3-1+b2
ii  libxfixes3           1:5.0.3-1
ii  libxmu6              2:1.1.2-2+b3
ii  libxpm4              1:3.5.12-1
ii  xdg-utils            1.1.3-1
ii  zlib1g               1:1.2.11.dfsg-1

Versions of packages gimp recommends:
ii  ghostscript  9.27~dfsg-2

Versions of packages gimp suggests:
ii  gimp-data-extras          1:2.0.2-1
pn  gimp-help-en | gimp-help  <none>
ii  gimp-python               2.10.8-2
ii  gvfs-backends             1.38.1-3
ii  libasound2                1.1.8-1

-- no debconf information