Rtorrent: Segfault after system update

[iamenderst]

Updated system, rtorrent closed fine before reboot and now segfaults after trying to start.
$ rtorrent
Caught internal_error: PollEPoll::modify(...) epoll_ctl(7, 1 -> 1, 118, [0x562dd0665a10:1]) = 1: Operation not permitted
/usr/lib/libtorrent.so.20(_ZN7torrent14internal_error10initializeERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE+0x24f) [0x7ffa4b33051f]
rtorrent(_ZN7torrent14internal_errorC1EPKc+0x8f) [0x562dcd4487ff]
/usr/lib/libtorrent.so.20(_ZN7torrent9PollEPoll6modifyEPNS_5EventEij+0x226) [0x7ffa4b349196]
rtorrent(+0x1279ab) [0x562dcd4eb9ab]
/usr/lib/libcurl.so.4(+0x32fbc) [0x7ffa4b65dfbc]
/usr/lib/libcurl.so.4(+0x3615f) [0x7ffa4b66115f]
/usr/lib/libcurl.so.4(curl_multi_socket_action+0x25) [0x7ffa4b661315]
rtorrent(+0x1254db) [0x562dcd4e94db]
rtorrent(+0x1257b2) [0x562dcd4e97b2]
rtorrent(+0x38ae9) [0x562dcd3fcae9]
/usr/lib/libtorrent.so.20(_ZN7torrent11thread_base10event_loopEPS0_+0x198) [0x7ffa4b383458]
rtorrent(+0x36a15) [0x562dcd3faa15]
/usr/lib/libc.so.6(__libc_start_main+0xf3) [0x7ffa4af59ce3]
rtorrent(+0x372fe) [0x562dcd3fb2fe]

[MattTreadwell]

Getting this same segfault on Arch Linux. rtorrent opens and displays my torrents, but segfaults after a minute or two.

rtorrent 0.9.7-2
libtorrent 0.13.7-1

[iamenderst]

Arch here as well

[rain-1]

I've been having similar crashes too, happens quite often.

[EwolBash]

Same issue here as well I believe. After a recent update.

``
1560758870 N rtorrent main: Starting thread.
1560758870 N rtorrent scgi: Starting thread.
1560758870 C Caught signal: 'Segmentation fault.
---DUMP---
Caught Segmentation fault, dumping stack:
/usr/bin/rtorrent(+0x37a4e) [0x55e467db3a4e]
/usr/lib/libpthread.so.0(+0x124d0) [0x7f8304a744d0]
/usr/lib/libtorrent.so.20(_ZN7torrent9PollEPoll11insert_readEPNS_5EventE+0x74) [0x7f8304b05b54]
/usr/bin/rtorrent(+0x1279ab) [0x55e467ea39ab]
/usr/lib/libcurl.so.4(+0x32fbc) [0x7f8304e1afbc]
/usr/lib/libcurl.so.4(+0x3615f) [0x7f8304e1e15f]
/usr/lib/libcurl.so.4(curl_multi_socket_action+0x25) [0x7f8304e1e315]
/usr/bin/rtorrent(+0x1254db) [0x55e467ea14db]
/usr/lib/libtorrent.so.20(_ZN7torrent9PollEPoll7performEv+0xee) [0x7f8304b0568e]
/usr/lib/libtorrent.so.20(_ZN7torrent9PollEPoll7do_pollEli+0x91) [0x7f8304b057a1]
/usr/lib/libtorrent.so.20(_ZN7torrent11thread_base10event_loopEPS0_+0x118) [0x7f8304b403d8]
/usr/bin/rtorrent(+0x36a15) [0x55e467db2a15]
/usr/lib/libc.so.6(__libc_start_main+0xf3) [0x7f8304716ce3]
/usr/bin/rtorrent(+0x372fe) [0x55e467db32fe]

---END---
``

[maki-chan]

Same problem here, even rebuilding libtorrent and rtorrent on my Arch system does not help.

Caught Segmentation fault, dumping stack:
rtorrent(+0x3dd00) [0x563aaf02dd00]
/usr/lib/libpthread.so.0(+0x13cb0) [0x7f8bd4e5bcb0]
/usr/lib/libtorrent.so.20(_ZN7torrent9PollEPoll11insert_readEPNS_5EventE+0x74) [0x7f8bd4ef7814]
rtorrent(+0x132aeb) [0x563aaf122aeb]
/usr/lib/libcurl.so.4(+0x32fbc) [0x7f8bd5003fbc]
/usr/lib/libcurl.so.4(+0x3615f) [0x7f8bd500715f]
/usr/lib/libcurl.so.4(curl_multi_socket_action+0x25) [0x7f8bd5007315]
rtorrent(+0x130b62) [0x563aaf120b62]
rtorrent(+0x130c34) [0x563aaf120c34]
rtorrent(+0x3eb2d) [0x563aaf02eb2d]
/usr/lib/libtorrent.so.20(_ZN7torrent11thread_base10event_loopEPS0_+0x15d) [0x7f8bd4f2d5cd]
rtorrent(+0x3c9b5) [0x563aaf02c9b5]
/usr/lib/libc.so.6(__libc_start_main+0xf3) [0x7f8bd4aa9ee3]
rtorrent(+0x3d27e) [0x563aaf02d27e]
[1]    12215 abort (core dumped)  rtorrent

[maki-chan]

Current temporary solution is to downgrade the curl package in Arch Linux. I tested it with version 7.65.0-2 (built myself from ABS). So somehow the latest libcurl (at least on Arch Linux) breaks compatibility with rtorrent.

[Idesmi]

Current temporary solution is to downgrade the curl package in Arch Linux. Somehow the latest libcurl (at least on Arch Linux) breaks compatibility with rtorrent.

Reverted curl to 7.64.1, works fine now.

[flesniak]

curl 7.65.1-3 from archlinux testing fixed the issue for me as well.

[iamenderst]

Confirmed, downgraded to curl 7.64.1-2 and working again.
Since this seems to exist with Arch + curl 7.65.1-2 and curl 7.65.1-3 from testing works from comments above, closing this issue.

[jrabensc]

same error here on latest debian buster.

curl version: curl 7.64.0 (x86_64-pc-linux-gnu) libcurl/7.64.0 OpenSSL/1.1.1d zlib/1.2.11 libidn2/2.0.5 libpsl/0.20.2 (+libidn2/2.0.5) libssh2/1.8.0 nghttp2/1.36.0 librtmp/2.3

rtorrent version: 0.9.7

error message from rtorrent:

Caught Segmentation fault, dumping stack: 273/279/300] [F 600/600] rtorrent(+0x1cee2) [0x5604fb620ee2] /lib/x86_64-linux-gnu/libpthread.so.0(+0x12730) [0x7ffa87da9730] /usr/lib/x86_64-linux-gnu/libcurl.so.4(+0x34923) [0x7ffa88e76923] /usr/lib/x86_64-linux-gnu/libcurl.so.4(+0x356ea) [0x7ffa88e776ea] /usr/lib/x86_64-linux-gnu/libcurl.so.4(+0x38eaa) [0x7ffa88e7aeaa] /usr/lib/x86_64-linux-gnu/libcurl.so.4(curl_multi_socket_action+0x25) [0x7ffa88e7aff5] rtorrent(+0xe13f9) [0x5604fb6e53f9] /usr/lib/x86_64-linux-gnu/libtorrent.so.20(_ZN7torrent9PollEPoll7performEv+0xe2) [0x7ffa88b69e82] /usr/lib/x86_64-linux-gnu/libtorrent.so.20(_ZN7torrent9PollEPoll7do_pollEli+0x90) [0x7ffa88b69fe0] /usr/lib/x86_64-linux-gnu/libtorrent.so.20(_ZN7torrent11thread_base10event_loopEPS0_+0x110) [0x7ffa88ba4b00] rtorrent(+0x1bbe8) [0x5604fb61fbe8] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xeb) [0x7ffa87bfa09b] rtorrent(+0x1c6ca) [0x5604fb6206ca] Aborted

[torbjorntorbjorn]

@jrabensc, you might be seeing the same problem as #1040.
Try running rtorrent as $ rtorrent -o network.http.max_open.set=299.

[jrabensc]

@torbjorntorbjorn Thanks for your answer. I updated my curl installation and rtorrent is working again without changing anything.

curl 7.72.0 (x86_64-pc-linux-gnu) libcurl/7.72.0 OpenSSL/1.1.1h zlib/1.2.11 brotli/1.0.9 libidn2/2.3.0 libpsl/0.21.0 (+libidn2/2.3.0) libssh2/1.8.0 nghttp2/1.42.0 librtmp/2.3