segfault in stable on Debian buster

Just a simple testapp results in:

Program received signal SIGSEGV, Segmentation fault.
0x0000000100000000 in ?? ()
(gdb) bt
#0  0x0000000100000000 in  ()
#1  0x00007ffff2ee907d in XML_ParseBuffer () at /lib/x86_64-linux-gnu/libexpat.so.1
#2  0x00007fffe817eb20 in  () at /usr/lib/x86_64-linux-gnu/libGLX_mesa.so.0
#3  0x00007fffe817c669 in  () at /usr/lib/x86_64-linux-gnu/libGLX_mesa.so.0
#4  0x00007fffe817a63d in  () at /usr/lib/x86_64-linux-gnu/libGLX_mesa.so.0
#5  0x00007fffe814e5ee in  () at /usr/lib/x86_64-linux-gnu/libGLX_mesa.so.0
#6  0x00007fffe8149dc4 in  () at /usr/lib/x86_64-linux-gnu/libGLX_mesa.so.0
#7  0x00007fffe814a7ad in  () at /usr/lib/x86_64-linux-gnu/libGLX_mesa.so.0
#8  0x00007ffff64e1b5e in  () at /usr/lib/x86_64-linux-gnu/libglfw.so.3
#9  0x00007ffff64e2424 in  () at /usr/lib/x86_64-linux-gnu/libglfw.so.3
#10 0x00007ffff64df375 in  () at /usr/lib/x86_64-linux-gnu/libglfw.so.3
#11 0x00007ffff64d8fd2 in glfwCreateWindow ()
    at /usr/lib/x86_64-linux-gnu/libglfw.so.3
#12 0x00005555557638e8 in ofAppGLFWWindow::setup(ofGLFWWindowSettings const&) (this=0x555555a5e740, _settings=...)
    at /home/arnaud/src/openframeworks/libs/openFrameworks/app/ofAppGLFWWindow.cpp:231
#13 0x000055555576310e in ofAppGLFWWindow::setup(ofGLWindowSettings const&) (this=0x555555a5e740, settings=...)
    at /home/arnaud/src/openframeworks/libs/openFrameworks/app/ofAppGLFWWindow.cpp:149
#14 0x0000555555767a7f in ofAppBaseGLWindow::setup(ofWindowSettings const&) (this=0x555555a5e740, settings=...)
    at /home/arnaud/src/openframeworks/libs/openFrameworks/app/ofAppBaseWindow.h:113
#15 0x0000555555747941 in ofMainLoop::createWindow(ofWindowSettings const&) (this=0x555555a613f0, settings=...)
    at /home/arnaud/src/openframeworks/libs/openFrameworks/app/ofMainLoop.cpp:65
#16 0x0000555555760998 in ofCreateWindow(ofWindowSettings const&) (settings=...)
    at /home/arnaud/src/openframeworks/libs/openFrameworks/app/ofAppRunner.cpp:222
#17 0x0000555555760925 in ofSetupOpenGL(int, int, ofWindowMode) (w=1024, h=768, screenMode=OF_WINDOW)
    at /home/arnaud/src/openframeworks/libs/openFrameworks/app/ofAppRunner.cpp:217
#18 0x00005555555c3d76 in main() ()
    at /home/arnaud/src/openframeworks/apps/myApps/example/src/main.cpp:6

Can't really pinpoint what is going wrong in windowP = glfwCreateWindow(settings.getWidth(), settings.getHeight(), settings.title.c_str(), nullptr, sharedContext); but it segfaults in both stable and master. It was working a week ago.

Start with the gdb backtrace and inspect the call to glfwCreateWindow at libs/openFrameworks/app/ofAppGLFWWindow.cpp:231, using the Debian buster environment described. Reproduce with the simple test app from apps/myApps/example/src/main.cpp:6 and compare stable and master; done means identifying and documenting a reproducible cause or confirmed fix for the window-creation segfault.