Description

I am looking at how to properly handle a problem with duplicate ACC

This is when TMCB_ON_FAILURE and TMCB_RESPONSE_OUT are both called, they are not using the same version of the message.
TMCB_ON_FAILURE is using the cloned version
TMCB_RESPONSE_OUT is using the original version

They are not sharing the message flags and 2 ACC events are generated.

Since this is very sensitive, I want to make sure I can trace the real root cause.
Not sure if this is a regression ...

Reproduction

Any failed call

Debugging Data

 0(4603) NOTICE: acc [acc_logic.c:686]: tmcb_func(): acc callback called for t(0x7f768b6dac08) event type 2, reply code 404 reqmsg[0x7f768b6dc840] rplmsg[0x7f76d096dee8]
 0(4603) ERROR: acc [acc_logic.c:697]: tmcb_func(): [TMCB_RESPONSE_IN][0x7f768b6dc840][0x7f76d096dee8]

// reply route execution

 0(4603) ERROR: <core> [core/sip_msg_clone.c:504]: sip_msg_shm_clone(): sip_msg_shm_clone[0x7f768b6dc840]>>[0x7f768b6de738]
 0(4603) NOTICE: acc [acc_logic.c:686]: tmcb_func(): acc callback called for t(0x7f768b6dac08) event type 128, reply code 404 reqmsg[0x7f768b6de738] rplmsg[0x7f76d096dee8]
 0(4603) ERROR: acc [acc_logic.c:694]: tmcb_func(): [TMCB_ON_FAILURE] run on_missed [0x7f768b6de738][0x7f76d096dee8] // working with the cloned message
 0(4603) ERROR: <core> [core/flags.c:59]: isflagset(): isflagset[0x7f768b6de738]
 0(4603) ERROR: acc_json [acc_json_mod.c:189]: acc_json_send_request(): missed call flag [7] for this transaction [on]

// failure route execution, we are working with the cloned message
 0(4603) NOTICE: <script>: [FAILURE]
 0(4603) ERROR: <core> [core/flags.c:46]: setflag(): setflag[0x7f768b6de738]
// failure

 0(4603) NOTICE: acc [acc_logic.c:686]: tmcb_func(): acc callback called for t(0x7f768b6dac08) event type 512, reply code 404 reqmsg[0x7f768b6dc840] rplmsg[0x7f76d096dee8]
 0(4603) ERROR: acc [acc_logic.c:689]: tmcb_func(): [TMCB_RESPONSE_OUT][0x7f768b6dc840][0x7f76d096dee8] // working with the original message
 0(4603) ERROR: <core> [core/flags.c:59]: isflagset(): isflagset[0x7f768b6dc840]
 0(4603) ERROR: acc_json [acc_json_mod.c:189]: acc_json_send_request(): missed call flag [7] for this transaction [on]

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