<p>If <code>avp_db_query</code> is used in the script but <code>db_url</code> was not set as a modparam for avpops then OpenSIPS will segfault on startup.</p>
<pre><code>* thread #1: tid = 0x0000, 0x0000000104325a8f avpops.so`avpops_db_bind + 159 at avpops_db.c:157, stop reason = signal SIGSTOP
* frame #0: 0x0000000104325a8f avpops.so`avpops_db_bind + 159 at avpops_db.c:157
frame #1: 0x0000000104320a54 avpops.so`avpops_init + 292 at avpops.c:240
frame #2: 0x0000000103851240 opensips`init_mod(m=0x0000000103a1ddd0, skip_others=<unavailable>) + 320 at sr_module.c:632
frame #3: 0x00000001038510e4 opensips`init_modules + 20 at sr_module.c:676
frame #4: 0x00000001037ffdf6 opensips`main(argc=<unavailable>, argv=<unavailable>) + 9334 at main.c:1205
frame #5: 0x00007fff8370c5c9 libdyld.dylib`start + 1
</code></pre>
<p>Looks to be a result of <code>get_default_db_url</code> returning NULL and then <code>avops_db_bind</code> trying to use <code>default_db_url</code> without checking for the possibility of it being NULL.</p>
<p>Seems like another check in <code>avops_db_bind</code> for <code>default_db_url</code> being NULL in the case that a DB function is used would solve the problem.</p>
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