Gerbview negative objects not displayed sometimes (OpenGL)

[Graham Wideman]

I loaded a gerber file into gerbview, and it displays plausibly. Then in the Visibles panel I switch the active layer, and immediately gerbview forgets part of the layer. Happens on multiple gerber files. I attach an example culprit gerber, plus two screenshots. Screenshot 01 is right after loading, and Screenshot 02 is after taking one additional step, change the active layer.

Gerbview version
Application: gerbview
Version: (2018-01-18 revision 959767c09)-makepkg, release build
Libraries:
    wxWidgets 3.0.3
    libcurl/7.54.1 OpenSSL/1.0.2l zlib/1.2.11 libssh2/1.8.0 nghttp2/1.23.1 librtmp/2.3
Platform: Windows 7 (build 7601, Service Pack 1), 64-bit edition, 64 bit, Little endian, wxMSW
Build Info:
    wxWidgets: 3.0.3 (wchar_t,wx containers,compatible with 2.8)
    Boost: 1.60.0
    Curl: 7.54.1
    Compiler: GCC 7.1.0 with C++ ABI 1011

Build settings:
    USE_WX_GRAPHICS_CONTEXT=OFF
    USE_WX_OVERLAY=OFF
    KICAD_SCRIPTING=ON
    KICAD_SCRIPTING_MODULES=ON
    KICAD_SCRIPTING_WXPYTHON=ON
    KICAD_SCRIPTING_ACTION_MENU=ON
    BUILD_GITHUB_PLUGIN=ON
    KICAD_USE_OCE=ON
    KICAD_SPICE=ON

[Jon Evans (craftyjon)]

Confirmed, seems to happen with OpenGL (accelerated canvas) only -- Cairo/Fallback is OK

[KiCad Janitor (kicad-janitor)]

Fixed in revision 1f487593fac0ef5115bdd54fc12b961c6d3caab8
https://git.launchpad.net/kicad/patch/?id=1f487593fac0ef5115bdd54fc12b961c6d3caab8