minetest.read_schematic crash

Thread 16 "Server" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffc8e226c0 (LWP 183480)]
0x00007ffff7174dd9 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
(gdb)
(gdb) bt
#0  0x00007ffff7174dd9 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007ffff7b0baf7 in lua_pushstring () from /lib/x86_64-linux-gnu/libluajit-5.1.so.2
#2  0x00005555559d70d9 in ?? ()
#3  0x000055555597a926 in ?? ()
#4  0x00007ffff7ab6a9b in ?? () from /lib/x86_64-linux-gnu/libluajit-5.1.so.2
#5  0x00007ffff7b111ee in lua_pcall () from /lib/x86_64-linux-gnu/libluajit-5.1.so.2
#6  0x0000555555984a21 in ?? ()
#7  0x000055555599b6d1 in ?? ()
#8  0x0000555555c1f893 in ?? ()
#9  0x0000555555954e7e in ?? ()
#10 0x0000555555c21a77 in ?? ()
#11 0x0000555555c21c32 in ?? ()
#12 0x0000555555c333c2 in ?? ()
#13 0x0000555555a2b776 in ?? ()
#14 0x00007ffff72d44a3 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#15 0x00007ffff70a7fd4 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
#16 0x00007ffff712866c in ?? () from /lib/x86_64-linux-gnu/libc.so.6