Crash in gtk_init_check

[manus@…]

I'm migrating an application from GTK2 to GTK3 and while it launches when using XQuartz, it fails when trying to use an X server running on a different machine (Windows using Xming 7.5.010).

The trace is:

(lldb) bt

• thread #1: tid = 0x4f66, 0x00007fff99272132 libsystem_c.dylib`strlen + 18, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x0)
  • frame #0: 0x00007fff99272132 libsystem_c.dylib`strlen + 18 frame #1: 0x00007fff992c4d2f libsystem_c.dylib`vsscanf_l + 357 frame #2: 0x00007fff992b5053 libsystem_c.dylib`sscanf + 186 frame #3: 0x0000000111fe97b0 libepoxy.0.dylib`epoxy_glx_version + 55 frame #4: 0x000000011102c286 libgdk-3.0.dylib`gdk_x11_screen_init_gl + 132 frame #5: 0x000000011102c6bc libgdk-3.0.dylib`_gdk_x11_screen_update_visuals_for_gl + 398 frame #6: 0x0000000111035065 libgdk-3.0.dylib`_gdk_x11_screen_init_visuals + 1114 frame #7: 0x0000000111031862 libgdk-3.0.dylib`_gdk_x11_screen_new + 244 frame #8: 0x0000000111024004 libgdk-3.0.dylib`_gdk_x11_display_open + 384 frame #9: 0x0000000111001b36 libgdk-3.0.dylib`gdk_display_manager_open_display + 383 frame #10: 0x0000000110b1d8a9 libgtk-3.0.dylib`gtk_init_check + 19 frame #11: 0x000000010b7739e1 ec`F2124_36756 + 465 frame #12: 0x000000010b74baad ec`F2124_36637 + 2381 frame #13: 0x000000010b71857d ec`F2118_36485 + 2061 frame #14: 0x000000010b715c9c ec`F2118_36473 + 2028 frame #15: 0x000000010bc9eb1d ec`F1910_33151 + 1197 frame #16: 0x000000010bc43b4d ec`F1896_32888 + 701 frame #17: 0x00000001078d8e25 ec`F3984_69385 + 997 frame #18: 0x000000010be5a2b4 ec`F1841_30960 + 2356 frame #19: 0x000000010e03b7b7 ec`emain + 343 frame #20: 0x000000010e04d894 ec`main + 164 frame #21: 0x00007fff9517f5ad libdyld.dylib`start + 1