(gdb) bt
#0  0x00007f1f15b5bb66 in iris_set_damage_region (pscreen=0x5600ee97b350, pres=0x0, nrects=0, rects=0x0) at ../src/gallium/drivers/iris/iris_screen.c:696
#1  0x00007f1f14b00f66 in dri_st_framebuffer_validate
(st=<optimized out>, pdrawable=0x5600ee940b50, statts=0x5600eea7b208, count=1, out=0x7ffc184989f0, resolve=<optimized out>)
at ../src/gallium/frontends/dri/dri_drawable.c:99
#2  0x00007f1f14baaa99 in st_framebuffer_validate (stfb=0x5600eea7ada0, st=st@entry=0x5600eea51110) at ../src/mesa/state_tracker/st_manager.c:239
#3  0x00007f1f14bab5e2 in st_api_make_current (st=0x5600eea51110, stdrawi=stdrawi@entry=0x5600ee940b50, streadi=streadi@entry=0x5600ee940b50)
at ../src/mesa/state_tracker/st_manager.c:1143
#4  0x00007f1f14b00a2d in dri_make_current (ctx=0x5600ee941bb0, draw=draw@entry=0x5600ee940b50, read=read@entry=0x5600ee940b50)
at ../src/gallium/frontends/dri/dri_context.c:353
#5  0x00007f1f14b044a2 in driBindContext (ctx=<optimized out>, draw=draw@entry=0x5600ee940b50, read=read@entry=0x5600ee940b50)
at ../src/gallium/frontends/dri/dri_util.c:676
#6  0x00007f1f188d08e2 in dri_bind_context (context=0x5600ee981740, draw=4194305, read=4194305) at ../src/glx/dri_common.c:790
#7  0x00007f1f188d572e in MakeContextCurrent (dpy=0x5600ee884f10, draw=4194305, read=4194305, gc_user=0x5600ee981740, opcode=26) at ../src/glx/glxcurrent.c:158
#8  0x00007f1f1ecfc812 in InternalMakeCurrentVendor
(dpy=dpy@entry=0x5600ee884f10, draw=draw@entry=4194305, read=read@entry=4194305, ctxInfo=ctxInfo@entry=0x5600eea6b480, callerOpcode=callerOpcode@entry=26 '\032', threadState=threadState@entry=0x5600eea6b870, vendor=0x5600ee8c9290) at ../src/GLX/libglx.c:873
#9  0x00007f1f1ecfd116 in InternalMakeCurrentDispatch
(dpy=dpy@entry=0x5600ee884f10, draw=draw@entry=4194305, read=read@entry=4194305, ctxInfo=0x5600eea6b480, callerOpcode=callerOpcode@entry=26 '\032', vendor=0x5600ee8c9290) at ../src/GLX/libglx.c:926
#10 0x00007f1f1ecfe378 in CommonMakeCurrent (dpy=0x5600ee884f10, draw=4194305, read=4194305, context=0x5600ee981740, callerOpcode=<optimized out>)
at ../src/GLX/libglx.c:1070
#11 0x00007f1f18dceab8 in QGLXContext::makeCurrent (this=this@entry=0x5600ee979140, surface=0x5600ee939510)
at ./src/plugins/platforms/xcb/gl_integrations/xcb_glx/qglxintegration.cpp:494
#12 0x00007f1f2148fcfd in QOpenGLContext::makeCurrent (this=this@entry=0x7ffc18498e30, surface=surface@entry=0x5600ee939270) at ./src/gui/kernel/qopenglcontext.cpp:680
#13 0x00007f1f18dd17a5 in QGLXContext::queryDummyContext () at ./src/plugins/platforms/xcb/gl_integrations/xcb_glx/qglxintegration.cpp:636
#14 0x00007f1f18dd203d in QGLXContext::supportsThreading () at ./src/plugins/platforms/xcb/gl_integrations/xcb_glx/qglxintegration.cpp:716
#15 QXcbGlxIntegration::supportsThreadedOpenGL (this=<optimized out>) at ./src/plugins/platforms/xcb/gl_integrations/xcb_glx/qxcbglxintegration.cpp:200
#16 0x00007f1f2235c935 in QSGRenderLoop::instance () at ./src/quick/scenegraph/qsgrenderloop.cpp:190
#17 0x00007f1f222d107f in QQuickWindowPrivate::init (this=0x5600ee8d1950, c=0x5600ee8bfc40, control=0x0) at ./src/quick/items/qquickwindow.cpp:790
#18 0x00007f1f22987022 in PlasmaQuick::QuickViewSharedEngine::QuickViewSharedEngine
(this=this@entry=0x5600ee8bfc40, parent=parent@entry=0x0, this=<optimized out>, parent=<optimized out>) at ./src/plasmaquick/quickviewsharedengine.cpp:119
#19 0x00005600e752e84b in SplashWindow::SplashWindow (this=this@entry=0x5600ee8bfc40, testing=false, window=false, theme=..., screen=screen@entry=0x5600ee8ae5d0)
at ./ksplash/ksplashqml/splashwindow.cpp:35
#20 0x00005600e752c396 in SplashApp::adoptScreen (this=this@entry=0x7ffc18499290, screen=0x5600ee8ae5d0) at ./ksplash/ksplashqml/splashapp.cpp:130
#21 0x00005600e752cfbf in SplashApp::SplashApp (this=this@entry=0x7ffc18499290, argc=@0x7ffc1849927c: 2, argv=argv@entry=0x7ffc18499438)
at ./ksplash/ksplashqml/splashapp.cpp:71
#22 0x00005600e752bcc3 in main (argc=<optimized out>, argv=0x7ffc18499438) at ./ksplash/ksplashqml/main.cpp:24