(gdb) bt
#0  strlen () at ../sysdeps/x86_64/multiarch/../rtld-strlen.S:37
#1  0x00007f5b4fbe09b7 in _dl_signal_error (errcode=0, objname=0x193700000551 <Address 0x193700000551 out of bounds>, occation=0x0, errstring=0x7f5b4fbed3a1 "shared object not open")
    at dl-error.c:87
#2  0x00007f5b4fbe720d in _dl_close (_map=<value optimized out>) at dl-close.c:737
#3  0x00007f5b4fbe08c6 in _dl_catch_error (objname=<value optimized out>, errstring=<value optimized out>, mallocedp=<value optimized out>, operate=<value optimized out>, 
    args=<value optimized out>) at dl-error.c:178
#4  0x00007f5b4f09d2ac in _dlerror_run (operate=0x7f5b4f09cfe0 <dlclose_doit>, args=0x17c2ea0) at dlerror.c:164
#5  0x00007f5b4f09d00f in __dlclose (handle=<value optimized out>) at dlclose.c:48
#6  0x00000000004edcc6 in load_dynamic_module (resource_in=0x169a5c0 "codec_speex.so", global_symbols_only=0) at loader.c:437
#7  0x00000000004ef26f in load_resource (resource_name=0x169a5c0 "codec_speex.so", global_symbols_only=0, resource_heap=0x16901c0, required=0) at loader.c:836
#8  0x00000000004ef6e5 in load_resource_list (load_order=0x7fff4d6ecd10, global_symbols=0, mod_count=0x7fff4d6ecd8c) at loader.c:950
#9  0x00000000004eff33 in load_modules (preload_only=0) at loader.c:1126
#10 0x00000000004471cc in main (argc=8, argv=0x7fff4d6ef1c8) at asterisk.c:3805