using curl 8.12.0-DEV
loop[1] perform
* !!! WARNING !!!
* This is a debug build of libcurl, do not use in production.
* STATE: INIT => SETUP handle 0x8421df8; line 2677
* STATE: SETUP => CONNECT handle 0x8421df8; line 2693
* Added connection 0. The cache now contains 1 members
* Host localhost:43143 was resolved.
* IPv4: 127.0.0.1
* STATE: CONNECT => CONNECTING handle 0x8421df8; line 2608
*   Trying 127.0.0.1:43143...
* Connected to localhost (127.0.0.1) port 43143
* STATE: CONNECTING => PROTOCONNECT handle 0x8421df8; line 2731
* IMAP 0x841e2c0 state change from STOP to SERVERGREET
* STATE: PROTOCONNECT => PROTOCONNECTING handle 0x8421df8; line 2756
<         _   _ ____  _     
<     ___| | | |  _ \| |    
<    / __| | | | |_) | |    
<   | (__| |_| |  _ {| |___ 
<    \___|\___/|_| \_\_____|
< * OK curl IMAP server ready to serve
> A001 CAPABILITY
* IMAP 0x841e2c0 state change from SERVERGREET to CAPABILITY
< A001 BAD Command
> A002 LOGIN test test
* IMAP 0x841e2c0 state change from CAPABILITY to LOGIN
< A002 OK LOGIN completed
* IMAP 0x841e2c0 state change from LOGIN to STOP
* STATE: PROTOCONNECTING => DO handle 0x8421df8; line 2777
* STATE: DO => DONE handle 0x8421df8; line 2329
* multi_done[DONE]: status: 0 prem: 0 done: 0
* Connection #0 to host localhost left intact
loop[1] sent 13
loop[1] wait recv
loop[1] recv 36
loop[1] wait recv
loop[1] recv 26
loop[1] wait recv
loop[1] response:* BYE curl IMAP server signing off
A013 OK LOGOUT completed
--------
loop[2] perform
* STATE: INIT => SETUP handle 0x8421df8; line 2677
* STATE: SETUP => CONNECT handle 0x8421df8; line 2693
example: url.c:749: Curl_conn_seems_dead: Assertion `!data->conn' failed.

Program received signal SIGABRT, Aborted.