https://bugs.kde.org/show_bug.cgi?id=404080

            Bug ID: 404080
           Summary: Color Dodge - Logarithmic causes floating point
                    exception (core dumped)
           Product: krita
           Version: nightly build (please specify the git hash!)
          Platform: Manjaro
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: General
          Assignee: krita-bugs-n...@kde.org
          Reporter: manuel.snudl.zeid...@gmail.com
  Target Milestone: ---

I tried the new blending modes added in the appimage from 07. Feb.

Selecting "Color Dodge - Logarithmic" always results in Krita locking up and
exiting with a floating point exception (core dumped). Setting a layer to this
blending mode locks immediately, using it on a brush locks as soon as it
touches the canvas. I tried both RGB and LAB color spaces with both internal
and dedicated GPU on my laptop (through primusrun) - same outcome every time.

  Version: 4.2.0-pre-alpha (git b8d64d3)

Qt

  Version (compiled): 5.10.0
  Version (loaded): 5.10.0

OS Information

  Build ABI: x86_64-little_endian-lp64
  Build CPU: x86_64
  CPU: x86_64
  Kernel Type: linux
  Kernel Version: 4.20.7-1-MANJARO
  Pretty Productname: Manjaro Linux
  Product Type: manjaro
  Product Version: unknown

OpenGL Info

  Vendor:  NVIDIA Corporation 
  Renderer:  "GeForce GTX 860M/PCIe/SSE2" 
  Version:  "4.6.0 NVIDIA 415.27" 
  Shading language:  4.60 NVIDIA 
  Requested format:  QSurfaceFormat(version 3.0, options
QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24,
redBufferSize -1, greenBufferSize -1, blueBufferSize -1, alphaBufferSize -1,
stencilBufferSize 8, samples -1, swapBehavior
QSurfaceFormat::SwapBehavior(DoubleBuffer), swapInterval 0, colorSpace
QSurfaceFormat::ColorSpace(DefaultColorSpace), profile 
QSurfaceFormat::OpenGLContextProfile(CompatibilityProfile)) 
  Current format:    QSurfaceFormat(version 4.6, options
QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24,
redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0,
stencilBufferSize 8, samples -1, swapBehavior
QSurfaceFormat::SwapBehavior(DoubleBuffer), swapInterval 0, colorSpace
QSurfaceFormat::ColorSpace(DefaultColorSpace), profile 
QSurfaceFormat::OpenGLContextProfile(CompatibilityProfile)) 
     Version: 4.6
     Supports deprecated functions true 
     is OpenGL ES: false 

Hardware Information

  GPU Acceleration: auto
  Memory: 15951 Mb
  Number of Cores: 8
  Swap Location: /tmp

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