Core was generated by `/usr/bin/lightdm-webkit2-greeter'.
Program terminated with signal SIGILL, Illegal instruction.
#0  0x00006880fb2e0254 in atomic_store_n (model=5, val=<optimized out>, ptr=0x6880a8014010)
    at /usr/src/debug/gcc/gcc/libatomic/config/x86/host-config.h:136
136	/usr/src/debug/gcc/gcc/libatomic/config/x86/host-config.h: No such file or directory.