uzbl: SIGABRT on get_zoom_level() traceback

gistfile1.txt

======
Commit: v0.9.1-90-gda3f2f78
GTK compile: 3.22.5
GTK run: 3.22.4
WebKit compile: 2.14.2
WebKit run: 2.14.2
WebKit2: 1
libsoup compile: 2.56.0
libsoup run: 2.56.0
======
Thread 1 "uzbl-core" received signal SIGABRT, Aborted.
__GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:58
58	../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) bt
#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:58
#1  0x00007ffff145240a in __GI_abort () at abort.c:89
#2  0x00007ffff148ebd0 in __libc_message (do_abort=do_abort@entry=2, fmt=fmt@entry=0x7ffff15821df "*** %s ***: %s terminated\n") at ../sysdeps/posix/libc_fatal.c:175
#3  0x00007ffff15170e7 in __GI___fortify_fail (msg=msg@entry=0x7ffff15821c7 "stack smashing detected") at fortify_fail.c:30
#4  0x00007ffff15170b0 in __stack_chk_fail () at stack_chk_fail.c:28
#5  0x000055555556bf3e in get_zoom_level () at src/variables.c:1973
#6  0x000055555557101d in get_variable_double (var=<optimized out>) at src/variables.c:598
#7  variable_expand (var=<optimized out>, buf=0x55555588c000) at src/variables.c:1019
#8  0x0000555555571554 in send_variable_event (name=0x555555a7e2c0 "zoom_level", var=0x55555586df00) at src/variables.c:526
#9  0x000055555557221e in uzbl_variables_set (name=0x555555a7e2c0 "zoom_level", val=val@entry=0x5555558ac4d0 "1.0") at src/variables.c:199
#10 0x000055555556108d in cmd_set (argv=<optimized out>, result=<optimized out>) at src/commands.c:2371
#11 0x00005555555647f4 in uzbl_commands_run_parsed (info=0x55555577cc00 <builtin_command_table+1088>, argv=0x5555559140c0, result=0x0) at src/commands.c:240
#12 0x0000555555564c5a in uzbl_commands_run (cmd=0x5555558a49b0 "set zoom_level 1.0", result=0x0) at src/commands.c:372
#13 0x0000555555564d43 in parse_command_from_file (cmd=<optimized out>) at src/commands.c:679
#14 0x0000555555565034 in parse_command_from_file (cmd=<optimized out>) at src/commands.c:671
#15 parse_command_from_file_cb (data=0x0, line=<optimized out>) at src/commands.c:532
#16 for_each_line_in_file (callback=<optimized out>, data=0x0, path=<optimized out>) at src/commands.c:515
#17 uzbl_commands_load_file (path=<optimized out>) at src/commands.c:387
#18 0x00005555555603e3 in read_config_file (file=0x55555588ff50 "/home/komar/.config/uzbl/config") at src/uzbl-core.c:435
#19 uzbl_init (argc=<optimized out>, argv=<optimized out>) at src/uzbl-core.c:259
#20 0x000055555555f9b1 in main (argc=<optimized out>, argv=<optimized out>) at src/uzbl-core.c:346