On intel hardware

inxi -G
Graphics:
Device-1: Intel Skylake GT2 [HD Graphics 520] driver: i915 v: kernel
Display: x11 server: X.Org 1.20.5 driver: modesetting
resolution: 1920x1080~60Hz
OpenGL: renderer: Mesa DRI Intel HD Graphics 520 (Skylake GT2)
v: 4.5 Mesa 19.1.3

Mesa 19.1 crashes in eglMakeCurrent

Thread 1 (Thread 0x7f2696475880 (LWP 5640)):
[KCrash Handler]
#6  0x00007f2662609a94 in  () at /usr/lib/dri/i965_dri.so
#7  0x00007f26625286b4 in  () at /usr/lib/dri/i965_dri.so
#8  0x00007f26625a06fa in  () at /usr/lib/dri/i965_dri.so
#9  0x00007f268344e03b in  () at /usr/lib/libEGL.so.1
#10 0x00007f268343d0f4 in eglMakeCurrent () at /usr/lib/libEGL.so.1
#11 0x00007f2672a4653e in non-virtual thunk to KWin::AbstractEglBackend::makeCurrent() () at /usr/lib/qt5/plugins/org.kde.kwin.platforms/KWinX11Platform.so
#12 0x00007f26639ed68f in KWin::SceneOpenGL::paint(QRegion, QList<KWin::Toplevel*>) () at /usr/lib/qt5/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#13 0x00007f269596342b in KWin::Compositor::performCompositing() () at /usr/lib/libkwin.so.5
#14 0x00007f269339bdbb in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#15 0x00007f26940feb81 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#16 0x00007f2694105aa0 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#17 0x00007f26933729f9 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#18 0x00007f26933c2ae3 in QTimerInfoList::activateTimers() () at /usr/lib/libQt5Core.so.5
#19 0x00007f26933c0e10 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#20 0x00007f267a819cde in  () at /usr/lib/qt5/plugins/platforms/../../../libQt5XcbQpa.so.5
#21 0x00007f26933716fb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#22 0x00007f269337939e in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#23 0x00007f26960c43d4 in kdemain () at /usr/lib/libkdeinit5_kwin_x11.so
#24 0x00007f2695d24fbb in __libc_start_main () at /lib/libc.so.6
#25 0x000000000040060a in _start ()
[Inferior 1 (process 5640) detached]

it does not happen in 19.0.

Did it also happen in 19.1.2?

Yep, it starts when i switch to 19.1. It could be related to opengl 4.5 that ships with 19.1?

How to reproduce? Where did you get eglMakeCurrent?

No, not on intel Kabylake or amdgpu.

I'll apply the patch once he responds back with why this hasn't been merged yet.

a month later