(gdb) bt
#0 runtime.raise () at /usr/local/go/src/runtime/sys_linux_amd64.s:154
#1 0x00000000004516db in runtime.raisebadsignal (sig=8, c=0x7f7466e9ef50) at /usr/local/go/src/runtime/signal_unix.go:987
#2 0x0000000000451a47 in runtime.badsignal (sig=8, c=0x7f7466e9ef50) at /usr/local/go/src/runtime/signal_unix.go:1096
#3 0x0000000000450388 in runtime.sigtrampgo (sig=8, info=0x7f7466e9f0f0, ctx=0x7f7466e9efc0) at /usr/local/go/src/runtime/signal_unix.go:468
#4 0x000000000046c746 in runtime.sigtramp () at /usr/local/go/src/runtime/sys_linux_amd64.s:352
#5 0x00007f74ccb23050 in <signal handler called> () at /lib/x86_64-linux-gnu/libc.so.6
#6 0x00007f74ccd09697 in g_hash_table_lookup () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7 0x00007f74cc84311d in () at /lib/x86_64-linux-gnu/libpangoft2-1.0.so.0
#8 0x00007f74ccce855d in g_atomic_rc_box_release_full () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9 0x00007f74cc842ea7 in () at /lib/x86_64-linux-gnu/libpangoft2-1.0.so.0
#10 0x00007f74cc842f37 in () at /lib/x86_64-linux-gnu/libpangoft2-1.0.so.0
#11 0x00007f74ccd46cfd in () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007f74ccb70134 in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:442
#13 0x00007f74ccbf07dc in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81
After running that code, the program exits with a floating point exception in about a minute.