I've been working on making gevent use libevent's getaddrinfo and
occasionally get the above message in one of the test cases. What
could trigger it? How can I avoid it?
I don't call evdns_getaddrinfo_cancel if the callback was already
executed, so I wonder how could I arrive at invalid request?
libevent version: 2.0.8-rc
A bit more context:
#0 0x002cc422 in __kernel_vsyscall ()
No symbol table info available.
#1 0x0013a651 in raise () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
#2 0x0013da82 in abort () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
#3 0x00329385 in event_exit (errcode=-559030611) at
/home/denis/src/libevent-all/libevent-2.0.8-rc/log.c:79
No locals.
#4 0x003293b7 in event_errx (eval=-559030611, fmt=0x3402f4 "%s:%d:
Assertion %s failed in %s") at
/home/denis/src/libevent-all/libevent-2.0.8-rc/log.c:136
No locals.
#5 0x00334468 in evdns_cancel_request (base=0x8cac928,
handle=0x8cb9530) at
/home/denis/src/libevent-all/libevent-2.0.8-rc/evdns.c:2672
req = 0x267410
__func__ = "evdns_cancel_request"
#6 0x003344a6 in evdns_getaddrinfo_cancel (data=0x8d0e588) at
/home/denis/src/libevent-all/libevent-2.0.8-rc/evdns.c:4465
No locals.
#7 0x002e7773 in __pyx_pf_6gevent_4core_19getaddrinfo_request__cancel
(__pyx_v_self=<gevent.core.getaddrinfo_request at remote 0x8c74aec>,
unused=0x0)
at gevent/core.c:5227
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