https://bugs.kde.org/show_bug.cgi?id=416172

            Bug ID: 416172
           Summary: Rendering issues/crashes when opening files with
                    vector layer
           Product: krita
           Version: 4.2.8
          Platform: Debian stable
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: Layers/Vector
          Assignee: krita-bugs-n...@kde.org
          Reporter: rebe...@rbreu.de
  Target Milestone: ---

I'm not sure if it's maybe the same issue as
https://bugs.kde.org/show_bug.cgi?id=404681

I can only reproduce this with the appimages (4.2.8 and the current nightly
krita-4.3.0-prealpha-0a0738b). I can't reproduce it in a current docker build
for some reason.

It also only happens if the Krita document is of a certain size/complexity.
With the attached file I can reproduce the rendering issues 100% on my machine,
the crashes happen now and then. With smaller files the rendering issues happen
sometimes, with very simple files not at all.

test_exported_correctly.png shows what the image is supposed to look like:
every "speech bubble" has a text inside and a rectangle around.
test_opened_weird.png shows what I get when I open the file in Krita: lots of
the vetor objects are invisible (but still selectable), some weird artefact
shows up an the bottom half. test_exported_wrong.png shows what happens if I
export it in that state—the vectors are still invisible but the artifact
doesn't show up. I can "fix" the artifact by hiding/unhiding layers. The only
way to "fix" the vectors is by grabbing them, knowing where they are supposed
to be.


Krita

 Version: 4.2.8
 Languages: en_US
 Hidpi: false

Qt

  Version (compiled): 5.12.5
  Version (loaded): 5.12.5

OS Information

  Build ABI: x86_64-little_endian-lp64
  Build CPU: x86_64
  CPU: x86_64
  Kernel Type: linux
  Kernel Version: 4.9.0-9-amd64
  Pretty Productname: Debian GNU/Linux 9 (stretch)
  Product Type: debian
  Product Version: 9

OpenGL Info

  Vendor:  "Intel Open Source Technology Center" 
  Renderer:  "Mesa DRI Intel(R) Kabylake GT2 " 
  Version:  "3.0 Mesa 13.0.6" 
  Shading language:  "1.30" 
  Requested format:  QSurfaceFormat(version 3.0, options
QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24,
redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 8,
stencilBufferSize 8, samples -1, swapBehavior QSurfaceFormat::DoubleBuffer,
swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile 
QSurfaceFormat::CompatibilityProfile) 
  Current format:    QSurfaceFormat(version 3.0, options
QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24,
redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 8,
stencilBufferSize 8, samples -1, swapBehavior QSurfaceFormat::DoubleBuffer,
swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile 
QSurfaceFormat::NoProfile) 
     Version: 3.0
     Supports deprecated functions true 
     is OpenGL ES: false 

QPA OpenGL Detection Info 
  supportsDesktopGL: true 
  supportsOpenGLES: true 
  isQtPreferOpenGLES: false

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