Comment 36 for bug 2026757

This is from v2.90 from the ubuntu packaging:

                Stack trace of thread 349999:
                #0 0x00007f21c90499fc pthread_kill (libc.so.6 + 0x969fc)
                #1 0x00007f21c8ff5476 raise (libc.so.6 + 0x42476)
                #2 0x00007f21c8fdb7f3 abort (libc.so.6 + 0x287f3)
                #3 0x00007f21c903c676 n/a (libc.so.6 + 0x89676)
                #4 0x00007f21c9053cfc n/a (libc.so.6 + 0xa0cfc)
                #5 0x00007f21c9055a54 n/a (libc.so.6 + 0xa2a54)
                #6 0x00007f21c9058453 free (libc.so.6 + 0xa5453)
                #7 0x000055ea8f653810 dhcp_netid_free (dnsmasq + 0x1b810)
                #8 0x000055ea8f6538df dhcp_netid_list_free (dnsmasq + 0x1b8df)
                #9 0x000055ea8f653956 dhcp_config_free (dnsmasq + 0x1b956)
                #10 0x000055ea8f661868 clear_dynamic_conf (dnsmasq + 0x29868)
                #11 0x000055ea8f661947 reread_dhcp (dnsmasq + 0x29947)
                #12 0x000055ea8f6737b7 clear_cache_and_reload (dnsmasq + 0x3b7b7)
                #13 0x000055ea8f672db5 async_event (dnsmasq + 0x3adb5)
                #14 0x000055ea8f6725aa main (dnsmasq + 0x3a5aa)
                #15 0x00007f21c8fdcd90 n/a (libc.so.6 + 0x29d90)
                #16 0x00007f21c8fdce40 __libc_start_main (libc.so.6 + 0x29e40)
                #17 0x000055ea8f642bc5 _start (dnsmasq + 0xabc5)