QBittorent 4.5.5 x64 crashes while checking torrents

[user100100100]

qBittorrent & operating system versions

qBittorrent v4.5.5 x64
Operating system Windows Server 2022. RAM 128GB
Qt: 5.15.10
libtorrent:1.2.19.0

What is the problem?

Qbittorent crashes while checking torrents. Eats all ram and crashes. I can't copy crash info.
I use this workaround: Using task Manager monitor RAM usage , when usage more than 90% I quit Qbitttorent. After restarting, the scan continues

Steps to reproduce

1 Recheck large torrent file (more than 400GiB). Large Single File in Torrent contents

Additional context

No response

Log(s) & preferences file(s)

No response

[xavier2k6]

@user100100100 Would you be able to share the torrent for reproduction purposes?

Recheck large torrent file (more than 400GiB). Large Single File in Torrent contents

Is the single file 400GiB?

[stalkerok]

No problems were found in Win10. Created a file of 500000000000 bytes, created a torrent file and successfully rechecked.

[user100100100]

I created with Qbittorent torrent with 1 tb single file - no problems with recheck found

Problematic torrent file:

comics4__for_science.tar.zip

[stalkerok]

400GB is not equal to 1.6TB.
I don't have the opportunity to check such a volume (there is not so much space on NVMe), but I think everything would go smoothly.

[user100100100]

First I find this problem with 400GB file, but this was long time ago.
I have tested this 1.6TB file on another pc with fresh windows and QBittorrent install with default settings. Same memory leak problem. I am not expert in .torrent file data structures, so maybe someone who have knowledge can look and find that's wrong

[xavier2k6]

Can you reproduce with v4.6.0 using default settings?

Please test if possible with both libtorrent 1.2.19 & libtorrent 2.0.9 based builds.

1.6TB file

Thanks for the torrent....will download/test when I can & see if I can capture the crash/stack trace.

[user100100100]

v4.6.0 are way better
now it shows out of memory error , and when I press force resume it crash with following info

qBittorrent version: v4.6.0 (64-bit)
Libtorrent version: 1.2.19.0
Qt version: 6.4.3
Boost version: 1.83.0
OpenSSL version: 1.1.1w
zlib version: 1.3
OS version: Windows Server 2022 Version 21H2 10.0.20348 x86_64

Caught signal: SIGABRT

 0# boost::stacktrace::basic_stacktrace >::init at G:\QBITTORRENT\boost_1_83_0\boost\stacktrace\stacktrace.hpp:78
 1# getStacktrace at G:\QBITTORRENT\qbt-src-4.6.0\src\app\stacktrace.cpp:35
 2# `anonymous namespace'::abnormalExitHandler at G:\QBITTORRENT\qbt-src-4.6.0\src\app\signalhandler.cpp:104
 3# raise at minkernel\crts\ucrt\src\appcrt\misc\signal.cpp:547
 4# abort at minkernel\crts\ucrt\src\appcrt\startup\abort.cpp:71
 5# terminate at minkernel\crts\ucrt\src\appcrt\misc\terminate.cpp:58
 6# FindHandler at D:\a\_work\1\s\src\vctools\crt\vcruntime\src\eh\frame.cpp:735
 7# __InternalCxxFrameHandler at D:\a\_work\1\s\src\vctools\crt\vcruntime\src\eh\frame.cpp:399
 8# __InternalCxxFrameHandlerWrapper at D:\a\_work\1\s\src\vctools\crt\vcruntime\src\eh\frame.cpp:234
 9# __CxxFrameHandler4 at D:\a\_work\1\s\src\vctools\crt\vcruntime\src\eh\risctrnsctrl.cpp:306
10# _chkstk in ntdll
11# RtlVirtualUnwind2 in ntdll
12# RtlRaiseException in ntdll
13# RaiseException in KERNELBASE
14# _CxxThrowException at D:\a\_work\1\s\src\vctools\crt\vcruntime\src\eh\throw.cpp:75
15# std::_Xbad_alloc at D:\a\_work\1\s\src\vctools\crt\github\stl\src\xthrow.cpp:13
16# operator new at D:\a\_work\1\s\src\vctools\crt\vcstartup\src\heap\new_scalar.cpp:48
17# libtorrent::block_cache::try_evict_blocks at G:\QBITTORRENT\libtorrent\src\block_cache.cpp:953
18# libtorrent::disk_io_thread::check_cache_level at G:\QBITTORRENT\libtorrent\src\disk_io_thread.cpp:1134
19# libtorrent::disk_io_thread::perform_job at G:\QBITTORRENT\libtorrent\src\disk_io_thread.cpp:1225
20# libtorrent::disk_io_thread::execute_job at G:\QBITTORRENT\libtorrent\src\disk_io_thread.cpp:3077
21# libtorrent::disk_io_thread::thread_fun at G:\QBITTORRENT\libtorrent\src\disk_io_thread.cpp:3181
22# libtorrent::disk_io_thread::job_queue::thread_fun at G:\QBITTORRENT\libtorrent\include\libtorrent\disk_io_thread.hpp:402
23# std::thread::_Invoke,boost::asio::io_context::work>,0,1,2,3> at C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.34.31933\include\thread:56
24# thread_start at minkernel\crts\ucrt\src\appcrt\startup\thread.cpp:97
25# BaseThreadInitThunk in KERNEL32
26# RtlUserThreadStart in ntdll

Attached video file (speed-ed up) for steps reproducing this error
bug-2S1.zip

[stalkerok]

You clearly don't have the default settings. Attach the client settings file.

[xavier2k6]

RAM 128GB
now it shows out of memory error , and when I press force resume it crash with following info

Thanks for the extra info & video!

@user100100100
Could you try reproduce with the libtorrent 2.x build?
Does eventvwr show anything related to qBittorrent via windows error report....exception code perhaps?
Any crashdumps in %LOCALAPPDATA%\CrashDumps?

[xavier2k6]

I have a windows system with 128GB of ram too that I can test with but probably won't bee able to until the weekend.

[user100100100]

Event viewer shows:

---

Faulting application name: qbittorrent.exe, version: 4.6.0.0, time stamp: 0x65346f28
Faulting module name: qbittorrent.exe, version: 4.6.0.0, time stamp: 0x65346f28
Exception code: 0xc0000005
Fault offset: 0x000000000047697c
Faulting process id: 0x1bfc
Faulting application start time: 0x01da0647c8cb273d
Faulting application path: C:\Program Files\qBittorrent\qbittorrent.exe
Faulting module path: C:\Program Files\qBittorrent\qbittorrent.exe
Faulting package full name:
Faulting package-relative application ID:

---

Fault bucket 1818093415358088865, type 4
Event Name: APPCRASH
Response: Not available
Cab Id: 0

Problem signature:
P1: qbittorrent.exe
P2: 4.6.0.0
P3: 65346f28
P4: qbittorrent.exe
P5: 4.6.0.0
P6: 65346f28
P7: c0000005
P8: 000000000047697c
P9:
P10:

---

no crash Dumps in %LOCALAPPDATA%\CrashDumps
only report are available
Report.zip

[stalkerok]

@user100100100, copy qbittorrent.exe to a separate directory, create a profile folder next to it and try again. The portable version is guaranteed to have default settings.

[user100100100]

Qbittorent 4.6.0 x64/Libtorrent 2.0.9.0 rechecks this trouble-making torrent without any problems.
So you can close this case. I will use this version.

[xavier2k6]

@arvidn If you have time, can you review stack trace/video from #19745 (comment) please?

[xavier2k6]

Note to self, libtorrent 1.2.x based too - #15878, #15874

[xavier2k6]

I created with Qbittorent torrent with 1 tb single file - no problems with recheck found

Problematic torrent file:

comics4__for_science.tar.zip

This is another example torrent which has piece size of 256.0 MiB

[xavier2k6]

@user100100100 There does seem to be an issue with libtorrent 1.2.x based builds & torrents which use piece size of 256.0 MiB, it look like libtorrent 2.0.x builds are not affected as far as I can tell.

[xavier2k6]

Please subscribe/follow #21011