IOT instruction (core dumped)

Calling

LD_PRELOAD=../src/.libs/libdatovka.so .libs/downloadattachment

causes

...

</q:dmQTimestamp><q:dmDeliveryTime>2023-08-14T15:16:08.228+02:00</q:dmDeliveryTime><q:dmAcceptanceTime>2023-08-14T15:16:17.832+02:00</q:dmAcceptanceTime><q:dmMessageStatus>6</q:dmMessageStatus><q:dmAttachmentSize>32768</q:dmAttachmentSize></dmReturnedMessageEnvelope>
corrupted size vs. prev_size while consolidating
zsh: IOT instruction (core dumped)  LD_PRELOAD=../src/.libs/libdatovka.so .libs/downloadattachment