Assertion fail on download

[XITRIX]

Please provide the following information

libtorrent version (or branch): RC_2_0

platform/architecture: iOS/visionOS arm64

compiler and compiler version: xCode 15.1 beta (15C5028h)

please describe what symptom you see, what you would expect to see instead and
how to reproduce it.

Just trying to download torrent file, I don't think I'm doing something special, it downloads for a bit (from several seconds to several minutes).
If auto_managed flag is disabled, torrent goes in isPaused state, if flag is enabled in Release speed just drops to 0, in debug it raises the SIGABRT with this stacktrace:

log.txt

Also looks like different asserts raises from time to time but symptoms all the same.

Thanks in advance for any help, cause right now I just have no idea where I should take a look

UP.
One more assert
log2.txt

Also my phone has 700+ gb of free space, and ram usage was not higher than 60mb

UP2.
It fails with this message from error alert:

Pausing for a second and resuming restores download process. Empty space is more then enough

[ValeZAA]

Looks related #7517 (comment)

Are you sure you are not using a memory card?

[XITRIX]

@ValeZAA, no, it's an iPhone, it has no memory cards :D

[SSpaZioMilano]

Have the same problem on my iPhone 15 pro max on last ios17.3.

[ValeZAA]

@ValeZAA, no, it's an iPhone, it has no memory cards :D

Neither does my Galaxy S22 U.

[arvidn]

I believe there's some issue when a write to disk fails, because the disk is full. Is that the case for you?

[XITRIX]

Thanks for reply, but no, I have 1TB phone with only around +-200 GB occupied, so I have plenty of free space. Also libtorrent v1.2.x do not has such issue, so for now I decided to use this version instead of v2

[XITRIX]

Seems like forcing TORRENT_HAVE_MMAP=0 solved my issue, but now app started to feel a bit unresponsive (I could see 50Mbps download speed but nothing progress for several seconds), I'll test a bit more comparing with v1.2, maybe it's my imagination and it was the same.

Decided to give it a try after reading this #7551

UP.
Unresponsiveness comes from debugging tools, without them app works more than good

[ValeZAA]

Seems like forcing TORRENT_HAVE_MMAP=0 solved my issue

so the bug is in Google's fork of linux kernel.

[XITRIX]

so the bug is in Google's fork of linux kernel.

What does Google and the Linux kernel have to do with it? I'm running libtorrent not on Android but on iOS