On 9. Aug 2021, at 11.03, Joan Moreau <jom@grosjo.net> wrote:

#0 0x00007f2370f7fe3d in o_stream_nsendv (stream=0x0, iov=iov@entry=0x7ffeb9dabd70, iov_count=iov_count@entry=1) at ostream.c:333

overflow = false
#1 0x00007f2370f7feca in o_stream_nsend (stream=<optimized out>, data=<optimized out>, size=<optimized out>) at ostream.c:325
iov = {iov_base = 0x55b8af41d470, iov_len = 5}
#2 0x00007f2370f7ff1a in o_stream_nsend_str (stream=<optimized out>, str=<optimized out>) at ostream.c:344
No locals.
#3 0x000055b8af391f84 in indexer_client_status_callback (percentage=56, context=0x55b8af434b70) at indexer-client.c:146
_data_stack_cur_id = 4
ctx = 0x55b8af434b70
#4 0x000055b8af3921a0 in indexer_queue_request_status_int (queue=0x55b8af4299a0, request=0x55b8af434b90, percentage=56) at indexer-queue.c:182
context = <optimized out>

Looks like v2.3.15 already broke this. Happens when indexer-client disconnects early. Hopefully doesn't happen very often.