Lighttpd

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7f54c1af66e0 (LWP 4054)]
0x0000000000428df2 in array_get_index (a=0xfd6, key=0x7f54bfc93a68 "index-file.names", keylen=17, rndx=0x0)
    at array.c:91
91              for (i = pos = a->next_power_of_2 / 2; ; i >>= 1) {
(gdb) where
#0  0x0000000000428df2 in array_get_index (a=0xfd6, key=0x7f54bfc93a68 "index-file.names", keylen=17, rndx=0x0)
    at array.c:91
#1  0x0000000000428f2c in array_get_element (a=0xfd6, key=0x7f54bfc93a68 "index-file.names", keylen=16)
    at array.c:122
#2  0x000000000042f628 in config_insert_values_global (srv=0x64d0d0, ca=0xfd6, cv=0x7fffc9b0ae20)
    at configfile-glue.c:186
#3  0x00007f54bfc932fd in mod_indexfile_set_defaults (srv=0x64d0d0, p_d=0x652080) at mod_indexfile.c:106
#4  0x000000000042734e in plugins_call_set_defaults (srv=0x64d0d0) at plugin.c:433
#5  0x000000000040c912 in main (argc=4, argv=0x7fffc9b0b1f8, envp=0x7fffc9b0b220) at server.c:1418
(gdb) 

1.conf:

server.port = 8081

server.document-root = "."