Hello,
I am having a problem when passing special characters to my ARI application. Asterisk will pass these characters via SIP with no problem, and they can also be echoed out to a file via the dialplan.
When attempting to pass them to the ARI, however, we get the stasis and json.c errors below. There is no interruption to the dialplan, and the ari application receives the other args.
The system is CentOS 7.9 running Asterisk 16.23, and has been tested with --with-jansson-bundled as well as pulling the latest jansson (2.14) and building Astersik with that (because I was not sure if the bundled is also the latest jansson library).
These characters are received in the body of a SIP Message packet. In the example below, Asterisk dialplan receives MESSAGE(body) of %▒=▒ and later echoes to file as %<%<D8>=<DE> … but the ARI does not recieve the message body at all.
Any suggestions?
[Jan 24 20:42:57] -- Executing [5554445739@MESSAGE-IN:5] Stasis("Message/ast_msg_queue", "my-ari,pjsip:5554445739@192.168.0.50,<sip:0015554448633@192.168.0.22>,%<%▒=▒,inbound") in new stack
[Jan 24 20:42:57] ERROR[26538][C-00000001]: res_stasis.c:1035 send_start_msg_snapshots: Error appending to StasisStart message
[Jan 24 20:42:57] ERROR[26538][C-00000001]: res_stasis.c:1380 stasis_app_exec: Error sending start message to 'my-ari'
[Jan 24 20:42:57] ERROR[26626]: json.c:607 ast_json_vpack: Error building JSON from '{s: s?, s: s?, s: o, s: s?, s: s?}': Invalid UTF-8 string.
[Jan 24 20:42:57] ERROR[26626]: Got 12 backtrace records
# 0: /usr/sbin/asterisk(ast_json_pack+0x94) [0x4ff6f4]
# 1: /usr/sbin/asterisk(ast_json_dialplan_cep_app+0x65) [0x4ff815]
# 2: /usr/sbin/asterisk(ast_channel_snapshot_to_json+0x6c) [0x58b3dc]
# 3: /usr/sbin/asterisk() [0x58bc4c]
# 4: /usr/lib64/asterisk/modules/res_stasis.so(+0x1216f) [0x7f905b3c016f]
# 5: /usr/sbin/asterisk() [0x58dc92]
# 6: /usr/sbin/asterisk() [0x57cfd7]
# 7: /usr/sbin/asterisk(ast_taskprocessor_execute+0x177) [0x59d477]
# 8: /usr/sbin/asterisk() [0x59d520]
# 9: /usr/sbin/asterisk() [0x5acb19]
#10: /lib64/libpthread.so.0(+0x7ea5) [0x7f90b1dfeea5]
#11: /lib64/libc.so.6(clone+0x6d) [0x7f90b0e9c9fd]
[Jan 24 20:42:57] ERROR[26626]: json.c:607 ast_json_vpack: Error building JSON from '{ s: s, s: s, s: s, s: o, s: o, s: s, s: o, s: o, s: s }': NULL object.
[Jan 24 20:42:57] ERROR[26626]: Got 11 backtrace records
# 0: /usr/sbin/asterisk(ast_json_pack+0x94) [0x4ff6f4]
# 1: /usr/sbin/asterisk(ast_channel_snapshot_to_json+0x127) [0x58b497]
# 2: /usr/sbin/asterisk() [0x58bc4c]
# 3: /usr/lib64/asterisk/modules/res_stasis.so(+0x1216f) [0x7f905b3c016f]
# 4: /usr/sbin/asterisk() [0x58dc92]
# 5: /usr/sbin/asterisk() [0x57cfd7]
# 6: /usr/sbin/asterisk(ast_taskprocessor_execute+0x177) [0x59d477]
# 7: /usr/sbin/asterisk() [0x59d520]
# 8: /usr/sbin/asterisk() [0x5acb19]
# 9: /lib64/libpthread.so.0(+0x7ea5) [0x7f90b1dfeea5]
#10: /lib64/libc.so.6(clone+0x6d) [0x7f90b0e9c9fd]
[Jan 24 20:42:57] ERROR[26626]: json.c:607 ast_json_vpack: Error building JSON from '{s: s?, s: s?, s: o, s: s?, s: s?}': Invalid UTF-8 string.
[Jan 24 20:42:57] ERROR[26626]: Got 12 backtrace records
# 0: /usr/sbin/asterisk(ast_json_pack+0x94) [0x4ff6f4]
# 1: /usr/sbin/asterisk(ast_json_dialplan_cep_app+0x65) [0x4ff815]
# 2: /usr/sbin/asterisk(ast_channel_snapshot_to_json+0x6c) [0x58b3dc]
# 3: /usr/sbin/asterisk() [0x58bc4c]
# 4: /usr/lib64/asterisk/modules/res_stasis.so(+0x1216f) [0x7f905b3c016f]
# 5: /usr/sbin/asterisk() [0x58dc92]
# 6: /usr/sbin/asterisk() [0x57cfd7]
# 7: /usr/sbin/asterisk(ast_taskprocessor_execute+0x177) [0x59d477]
# 8: /usr/sbin/asterisk() [0x59d520]
# 9: /usr/sbin/asterisk() [0x5acb19]
#10: /lib64/libpthread.so.0(+0x7ea5) [0x7f90b1dfeea5]
#11: /lib64/libc.so.6(clone+0x6d) [0x7f90b0e9c9fd]
[Jan 24 20:42:57] ERROR[26626]: json.c:607 ast_json_vpack: Error building JSON from '{ s: s, s: s, s: s, s: o, s: o, s: s, s: o, s: o, s: s }': NULL object.
[Jan 24 20:42:57] ERROR[26626]: Got 11 backtrace records
# 0: /usr/sbin/asterisk(ast_json_pack+0x94) [0x4ff6f4]
# 1: /usr/sbin/asterisk(ast_channel_snapshot_to_json+0x127) [0x58b497]
# 2: /usr/sbin/asterisk() [0x58bc4c]
# 3: /usr/lib64/asterisk/modules/res_stasis.so(+0x1216f) [0x7f905b3c016f]
# 4: /usr/sbin/asterisk() [0x58dc92]
# 5: /usr/sbin/asterisk() [0x57cfd7]
# 6: /usr/sbin/asterisk(ast_taskprocessor_execute+0x177) [0x59d477]
# 7: /usr/sbin/asterisk() [0x59d520]
# 8: /usr/sbin/asterisk() [0x5acb19]
# 9: /lib64/libpthread.so.0(+0x7ea5) [0x7f90b1dfeea5]
#10: /lib64/libc.so.6(clone+0x6d) [0x7f90b0e9c9fd]
[Jan 24 20:42:57] ERROR[26626]: json.c:607 ast_json_vpack: Error building JSON from '{s: s?, s: s?, s: o, s: s?, s: s?}': Invalid UTF-8 string.
[Jan 24 20:42:57] ERROR[26626]: Got 12 backtrace records
# 0: /usr/sbin/asterisk(ast_json_pack+0x94) [0x4ff6f4]
# 1: /usr/sbin/asterisk(ast_json_dialplan_cep_app+0x65) [0x4ff815]
# 2: /usr/sbin/asterisk(ast_channel_snapshot_to_json+0x6c) [0x58b3dc]
# 3: /usr/sbin/asterisk() [0x58bc4c]
# 4: /usr/lib64/asterisk/modules/res_stasis.so(+0x1216f) [0x7f905b3c016f]
# 5: /usr/sbin/asterisk() [0x58dc92]
# 6: /usr/sbin/asterisk() [0x57cfd7]
# 7: /usr/sbin/asterisk(ast_taskprocessor_execute+0x177) [0x59d477]
# 8: /usr/sbin/asterisk() [0x59d520]
# 9: /usr/sbin/asterisk() [0x5acb19]
#10: /lib64/libpthread.so.0(+0x7ea5) [0x7f90b1dfeea5]
#11: /lib64/libc.so.6(clone+0x6d) [0x7f90b0e9c9fd]
[Jan 24 20:42:57] ERROR[26626]: json.c:607 ast_json_vpack: Error building JSON from '{ s: s, s: s, s: s, s: o, s: o, s: s, s: o, s: o, s: s }': NULL object.
[Jan 24 20:42:57] ERROR[26626]: Got 11 backtrace records
# 0: /usr/sbin/asterisk(ast_json_pack+0x94) [0x4ff6f4]
# 1: /usr/sbin/asterisk(ast_channel_snapshot_to_json+0x127) [0x58b497]
# 2: /usr/sbin/asterisk() [0x58bc4c]
# 3: /usr/lib64/asterisk/modules/res_stasis.so(+0x1216f) [0x7f905b3c016f]
# 4: /usr/sbin/asterisk() [0x58dc92]
# 5: /usr/sbin/asterisk() [0x57cfd7]
# 6: /usr/sbin/asterisk(ast_taskprocessor_execute+0x177) [0x59d477]
# 7: /usr/sbin/asterisk() [0x59d520]
# 8: /usr/sbin/asterisk() [0x5acb19]
# 9: /lib64/libpthread.so.0(+0x7ea5) [0x7f90b1dfeea5]
#10: /lib64/libc.so.6(clone+0x6d) [0x7f90b0e9c9fd]
[Jan 24 20:42:57] ERROR[26626]: json.c:607 ast_json_vpack: Error building JSON from '{s: s?, s: s?, s: o, s: s?, s: s?}': Invalid UTF-8 string.
[Jan 24 20:42:57] ERROR[26626]: Got 12 backtrace records
# 0: /usr/sbin/asterisk(ast_json_pack+0x94) [0x4ff6f4]
# 1: /usr/sbin/asterisk(ast_json_dialplan_cep_app+0x65) [0x4ff815]
# 2: /usr/sbin/asterisk(ast_channel_snapshot_to_json+0x6c) [0x58b3dc]
# 3: /usr/sbin/asterisk() [0x58bc4c]
# 4: /usr/lib64/asterisk/modules/res_stasis.so(+0x1216f) [0x7f905b3c016f]
# 5: /usr/sbin/asterisk() [0x58dc92]
# 6: /usr/sbin/asterisk() [0x57cfd7]
# 7: /usr/sbin/asterisk(ast_taskprocessor_execute+0x177) [0x59d477]
# 8: /usr/sbin/asterisk() [0x59d520]
# 9: /usr/sbin/asterisk() [0x5acb19]
#10: /lib64/libpthread.so.0(+0x7ea5) [0x7f90b1dfeea5]
#11: /lib64/libc.so.6(clone+0x6d) [0x7f90b0e9c9fd]
[Jan 24 20:42:57] ERROR[26626]: json.c:607 ast_json_vpack: Error building JSON from '{ s: s, s: s, s: s, s: o, s: o, s: s, s: o, s: o, s: s }': NULL object.
[Jan 24 20:42:57] ERROR[26626]: Got 11 backtrace records
# 0: /usr/sbin/asterisk(ast_json_pack+0x94) [0x4ff6f4]
# 1: /usr/sbin/asterisk(ast_channel_snapshot_to_json+0x127) [0x58b497]
# 2: /usr/sbin/asterisk() [0x58bc4c]
# 3: /usr/lib64/asterisk/modules/res_stasis.so(+0x1216f) [0x7f905b3c016f]
# 4: /usr/sbin/asterisk() [0x58dc92]
# 5: /usr/sbin/asterisk() [0x57cfd7]
# 6: /usr/sbin/asterisk(ast_taskprocessor_execute+0x177) [0x59d477]
# 7: /usr/sbin/asterisk() [0x59d520]
# 8: /usr/sbin/asterisk() [0x5acb19]
# 9: /lib64/libpthread.so.0(+0x7ea5) [0x7f90b1dfeea5]
#10: /lib64/libc.so.6(clone+0x6d) [0x7f90b0e9c9fd]
[Jan 24 20:42:57] ERROR[26626]: json.c:607 ast_json_vpack: Error building JSON from '{s: s?, s: s?, s: o, s: s?, s: s?}': Invalid UTF-8 string.
[Jan 24 20:42:57] ERROR[26626]: Got 12 backtrace records
# 0: /usr/sbin/asterisk(ast_json_pack+0x94) [0x4ff6f4]
# 1: /usr/sbin/asterisk(ast_json_dialplan_cep_app+0x65) [0x4ff815]
# 2: /usr/sbin/asterisk(ast_channel_snapshot_to_json+0x6c) [0x58b3dc]
# 3: /usr/sbin/asterisk() [0x58bc4c]
# 4: /usr/lib64/asterisk/modules/res_stasis.so(+0x1216f) [0x7f905b3c016f]
# 5: /usr/sbin/asterisk() [0x58dc92]
# 6: /usr/sbin/asterisk() [0x57cfd7]
# 7: /usr/sbin/asterisk(ast_taskprocessor_execute+0x177) [0x59d477]
# 8: /usr/sbin/asterisk() [0x59d520]
# 9: /usr/sbin/asterisk() [0x5acb19]
#10: /lib64/libpthread.so.0(+0x7ea5) [0x7f90b1dfeea5]
#11: /lib64/libc.so.6(clone+0x6d) [0x7f90b0e9c9fd]
[Jan 24 20:42:57] ERROR[26626]: json.c:607 ast_json_vpack: Error building JSON from '{ s: s, s: s, s: s, s: o, s: o, s: s, s: o, s: o, s: s }': NULL object.
[Jan 24 20:42:57] ERROR[26626]: Got 11 backtrace records
# 0: /usr/sbin/asterisk(ast_json_pack+0x94) [0x4ff6f4]
# 1: /usr/sbin/asterisk(ast_channel_snapshot_to_json+0x127) [0x58b497]
# 2: /usr/sbin/asterisk() [0x58bc4c]
# 3: /usr/lib64/asterisk/modules/res_stasis.so(+0x1216f) [0x7f905b3c016f]
# 4: /usr/sbin/asterisk() [0x58dc92]
# 5: /usr/sbin/asterisk() [0x57cfd7]
# 6: /usr/sbin/asterisk(ast_taskprocessor_execute+0x177) [0x59d477]
# 7: /usr/sbin/asterisk() [0x59d520]
# 8: /usr/sbin/asterisk() [0x5acb19]
# 9: /lib64/libpthread.so.0(+0x7ea5) [0x7f90b1dfeea5]
#10: /lib64/libc.so.6(clone+0x6d) [0x7f90b0e9c9fd]
[Jan 24 20:42:57] ERROR[26626]: json.c:607 ast_json_vpack: Error building JSON from '{s: s?, s: s?, s: o, s: s?, s: s?}': Invalid UTF-8 string.
[Jan 24 20:42:57] ERROR[26626]: Got 12 backtrace records
# 0: /usr/sbin/asterisk(ast_json_pack+0x94) [0x4ff6f4]
# 1: /usr/sbin/asterisk(ast_json_dialplan_cep_app+0x65) [0x4ff815]
# 2: /usr/sbin/asterisk(ast_channel_snapshot_to_json+0x6c) [0x58b3dc]
# 3: /usr/sbin/asterisk() [0x58bc4c]
# 4: /usr/lib64/asterisk/modules/res_stasis.so(+0x1216f) [0x7f905b3c016f]
# 5: /usr/sbin/asterisk() [0x58dc92]
# 6: /usr/sbin/asterisk() [0x57cfd7]
# 7: /usr/sbin/asterisk(ast_taskprocessor_execute+0x177) [0x59d477]
# 8: /usr/sbin/asterisk() [0x59d520]
# 9: /usr/sbin/asterisk() [0x5acb19]
#10: /lib64/libpthread.so.0(+0x7ea5) [0x7f90b1dfeea5]
#11: /lib64/libc.so.6(clone+0x6d) [0x7f90b0e9c9fd]
[Jan 24 20:42:57] ERROR[26626]: json.c:607 ast_json_vpack: Error building JSON from '{ s: s, s: s, s: s, s: o, s: o, s: s, s: o, s: o, s: s }': NULL object.
[Jan 24 20:42:57] ERROR[26626]: Got 11 backtrace records
# 0: /usr/sbin/asterisk(ast_json_pack+0x94) [0x4ff6f4]
# 1: /usr/sbin/asterisk(ast_channel_snapshot_to_json+0x127) [0x58b497]
# 2: /usr/sbin/asterisk() [0x58bc4c]
# 3: /usr/lib64/asterisk/modules/res_stasis.so(+0x1216f) [0x7f905b3c016f]
# 4: /usr/sbin/asterisk() [0x58dc92]
# 5: /usr/sbin/asterisk() [0x57cfd7]
# 6: /usr/sbin/asterisk(ast_taskprocessor_execute+0x177) [0x59d477]
# 7: /usr/sbin/asterisk() [0x59d520]
# 8: /usr/sbin/asterisk() [0x5acb19]
# 9: /lib64/libpthread.so.0(+0x7ea5) [0x7f90b1dfeea5]
#10: /lib64/libc.so.6(clone+0x6d) [0x7f90b0e9c9fd]
[Jan 24 20:42:57] ERROR[26538][C-00000001]: json.c:607 ast_json_vpack: Error building JSON from '{s: s, s: s}': Invalid UTF-8 string.
[Jan 24 20:42:57] ERROR[26626]: Got 12 backtrace records
# 0: /usr/sbin/asterisk(ast_json_pack+0x94) [0x4ff6f4]
# 1: /usr/sbin/asterisk(ast_json_dialplan_cep_app+0x65) [0x4ff815]
# 2: /usr/sbin/asterisk(ast_channel_snapshot_to_json+0x6c) [0x58b3dc]
# 3: /usr/lib64/asterisk/modules/res_stasis.so(+0xeb15) [0x7f905b3bcb15]
# 4: /usr/lib64/asterisk/modules/res_stasis.so(+0x10f55) [0x7f905b3bef55]
# 5: /usr/sbin/asterisk() [0x58dc92]
# 6: /usr/sbin/asterisk() [0x57cfd7]
# 7: /usr/sbin/asterisk(ast_taskprocessor_execute+0x177) [0x59d477]
# 8: /usr/sbin/asterisk() [0x59d520]
# 9: /usr/sbin/asterisk() [0x5acb19]
#10: /lib64/libpthread.so.0(+0x7ea5) [0x7f90b1dfeea5]
#11: /lib64/libc.so.6(clone+0x6d) [0x7f90b0e9c9fd]
[Jan 24 20:42:57] ERROR[26626]: json.c:607 ast_json_vpack: Error building JSON from '{ s: s, s: s, s: s, s: o, s: o, s: s, s: o, s: o, s: s }': NULL object.
[Jan 24 20:42:57] ERROR[26626]: Got 11 backtrace records
# 0: /usr/sbin/asterisk(ast_json_pack+0x94) [0x4ff6f4]
# 1: /usr/sbin/asterisk(ast_channel_snapshot_to_json+0x127) [0x58b497]
# 2: /usr/lib64/asterisk/modules/res_stasis.so(+0xeb15) [0x7f905b3bcb15]
# 3: /usr/lib64/asterisk/modules/res_stasis.so(+0x10f55) [0x7f905b3bef55]
# 4: /usr/sbin/asterisk() [0x58dc92]
# 5: /usr/sbin/asterisk() [0x57cfd7]
# 6: /usr/sbin/asterisk(ast_taskprocessor_execute+0x177) [0x59d477]
# 7: /usr/sbin/asterisk() [0x59d520]
# 8: /usr/sbin/asterisk() [0x5acb19]
# 9: /lib64/libpthread.so.0(+0x7ea5) [0x7f90b1dfeea5]
#10: /lib64/libc.so.6(clone+0x6d) [0x7f90b0e9c9fd]
[Jan 24 20:42:57] ERROR[26626]: json.c:607 ast_json_vpack: Error building JSON from '{s: s?, s: s?, s: o, s: s?, s: s?}': Invalid UTF-8 string.
[Jan 24 20:42:57] ERROR[26626]: Got 12 backtrace records
# 0: /usr/sbin/asterisk(ast_json_pack+0x94) [0x4ff6f4]
# 1: /usr/sbin/asterisk(ast_json_dialplan_cep_app+0x65) [0x4ff815]
# 2: /usr/sbin/asterisk(ast_channel_snapshot_to_json+0x6c) [0x58b3dc]
# 3: /usr/lib64/asterisk/modules/res_stasis.so(+0xeb15) [0x7f905b3bcb15]
# 4: /usr/lib64/asterisk/modules/res_stasis.so(+0x10f55) [0x7f905b3bef55]
# 5: /usr/sbin/asterisk() [0x58dc92]
# 6: /usr/sbin/asterisk() [0x57cfd7]
# 7: /usr/sbin/asterisk(ast_taskprocessor_execute+0x177) [0x59d477]
# 8: /usr/sbin/asterisk() [0x59d520]
# 9: /usr/sbin/asterisk() [0x5acb19]
#10: /lib64/libpthread.so.0(+0x7ea5) [0x7f90b1dfeea5]
#11: /lib64/libc.so.6(clone+0x6d) [0x7f90b0e9c9fd]
[Jan 24 20:42:57] ERROR[26626]: json.c:607 ast_json_vpack: Error building JSON from '{ s: s, s: s, s: s, s: o, s: o, s: s, s: o, s: o, s: s }': NULL object.
[Jan 24 20:42:57] ERROR[26626]: Got 11 backtrace records
# 0: /usr/sbin/asterisk(ast_json_pack+0x94) [0x4ff6f4]
# 1: /usr/sbin/asterisk(ast_channel_snapshot_to_json+0x127) [0x58b497]
# 2: /usr/lib64/asterisk/modules/res_stasis.so(+0xeb15) [0x7f905b3bcb15]
# 3: /usr/lib64/asterisk/modules/res_stasis.so(+0x10f55) [0x7f905b3bef55]
# 4: /usr/sbin/asterisk() [0x58dc92]
# 5: /usr/sbin/asterisk() [0x57cfd7]
# 6: /usr/sbin/asterisk(ast_taskprocessor_execute+0x177) [0x59d477]
# 7: /usr/sbin/asterisk() [0x59d520]
# 8: /usr/sbin/asterisk() [0x5acb19]
# 9: /lib64/libpthread.so.0(+0x7ea5) [0x7f90b1dfeea5]
#10: /lib64/libc.so.6(clone+0x6d) [0x7f90b0e9c9fd]
[Jan 24 20:42:57] ERROR[26626]: json.c:607 ast_json_vpack: Error building JSON from '{s: s?, s: s?, s: o, s: s?, s: s?}': Invalid UTF-8 string.
[Jan 24 20:42:57] ERROR[26626]: Got 12 backtrace records
# 0: /usr/sbin/asterisk(ast_json_pack+0x94) [0x4ff6f4]
# 1: /usr/sbin/asterisk(ast_json_dialplan_cep_app+0x65) [0x4ff815]
# 2: /usr/sbin/asterisk(ast_channel_snapshot_to_json+0x6c) [0x58b3dc]
# 3: /usr/lib64/asterisk/modules/res_stasis.so(+0xeb15) [0x7f905b3bcb15]
# 4: /usr/lib64/asterisk/modules/res_stasis.so(+0x10f55) [0x7f905b3bef55]
# 5: /usr/sbin/asterisk() [0x58dc92]
# 6: /usr/sbin/asterisk() [0x57cfd7]
# 7: /usr/sbin/asterisk(ast_taskprocessor_execute+0x177) [0x59d477]
# 8: /usr/sbin/asterisk() [0x59d520]
# 9: /usr/sbin/asterisk() [0x5acb19]
#10: /lib64/libpthread.so.0(+0x7ea5) [0x7f90b1dfeea5]
#11: /lib64/libc.so.6(clone+0x6d) [0x7f90b0e9c9fd]
[Jan 24 20:42:57] ERROR[26626]: json.c:607 ast_json_vpack: Error building JSON from '{ s: s, s: s, s: s, s: o, s: o, s: s, s: o, s: o, s: s }': NULL object.
[Jan 24 20:42:57] ERROR[26626]: Got 11 backtrace records
# 0: /usr/sbin/asterisk(ast_json_pack+0x94) [0x4ff6f4]
# 1: /usr/sbin/asterisk(ast_channel_snapshot_to_json+0x127) [0x58b497]
# 2: /usr/lib64/asterisk/modules/res_stasis.so(+0xeb15) [0x7f905b3bcb15]
# 3: /usr/lib64/asterisk/modules/res_stasis.so(+0x10f55) [0x7f905b3bef55]
# 4: /usr/sbin/asterisk() [0x58dc92]
# 5: /usr/sbin/asterisk() [0x57cfd7]
# 6: /usr/sbin/asterisk(ast_taskprocessor_execute+0x177) [0x59d477]
# 7: /usr/sbin/asterisk() [0x59d520]
# 8: /usr/sbin/asterisk() [0x5acb19]
# 9: /lib64/libpthread.so.0(+0x7ea5) [0x7f90b1dfeea5]
#10: /lib64/libc.so.6(clone+0x6d) [0x7f90b0e9c9fd]
[Jan 24 20:42:57] ERROR[26538][C-00000001]: Got 15 backtrace records
# 0: /usr/sbin/asterisk(ast_json_pack+0x94) [0x4ff6f4]
# 1: /usr/sbin/asterisk(ast_channel_publish_varset+0x2b) [0x58af0b]
# 2: /usr/sbin/asterisk(pbx_builtin_setvar_helper+0x123) [0x53e423]
# 3: /usr/sbin/asterisk(pbx_builtin_setvar+0xb7) [0x53e6b7]
# 4: /usr/sbin/asterisk(pbx_exec+0xb9) [0x534f99]
# 5: /usr/sbin/asterisk() [0x5287f1]
# 6: /usr/sbin/asterisk() [0x52a944]
# 7: /usr/sbin/asterisk(ast_pbx_run_args+0xbc) [0x52d65c]
# 8: /usr/sbin/asterisk() [0x511953]
# 9: /usr/sbin/asterisk() [0x510f72]
#10: /usr/sbin/asterisk(ast_taskprocessor_execute+0xd0) [0x59d3d0]
#11: /usr/sbin/asterisk() [0x59d520]
#12: /usr/sbin/asterisk() [0x5acb19]
#13: /lib64/libpthread.so.0(+0x7ea5) [0x7f90b1dfeea5]
#14: /lib64/libc.so.6(clone+0x6d) [0x7f90b0e9c9fd]