https://bugs.kde.org/show_bug.cgi?id=522457
--- Comment #4 from Chris <[email protected]> --- I was able to resolve the issue in my particular case (with help of AI). I had inadvertently installed "icomoon" as a system font. that font is a glyphless font which apparently crashed the preview renderer. I still attached the back trace with as much debug symbols I could get to install/recognize. -- **Why it crashes:** the Fonts page renders a preview of each configured font on open. For a glyphless font, `PreviewRenderEngine::drawAutoSize` measures the preview text as **zero-sized**, and `KFI::CFcEngine::Xft::toImage()` then calls `XGetImage()` on a degenerate (0-dimension / out-of-bounds) region. `XGetImage` raises an X error; since no custom Xlib error handler is installed, Xlib's default handler calls **`exit()`** from the QtQuick pixmap-reader worker thread, which races teardown against the still-live GUI thread → SIGSEGV. Also including steps to reproduce if any interest: 1. `kwriteconfig6 --file kdeglobals --group General --key font "icomoon,11,-1,5,400,0,0,0,0,0,0,0,0,0,0,1,,0,0"` (any font with no glyphs for the sample text works) 2. Open System Settings → Fonts. 3. Crash. -- You are receiving this mail because: You are watching all bug changes.
