{"action":"created","issue":{"url":"https://api.github.com/repos/bitcoin/bitcoin/issues/14359","repository_url":"https://api.github.com/repos/bitcoin/bitcoin","labels_url":"https://api.github.com/repos/bitcoin/bitcoin/issues/14359/labels{/name}","comments_url":"https://api.github.com/repos/bitcoin/bitcoin/issues/14359/comments","events_url":"https://api.github.com/repos/bitcoin/bitcoin/issues/14359/events","html_url":"https://github.com/bitcoin/bitcoin/issues/14359","id":365239938,"node_id":"MDU6SXNzdWUzNjUyMzk5Mzg=","number":14359,"title":"bitcoin-qt hangs in futex() / __cxa_guard_acquire()","user":{"login":"mbuesch","id":3619761,"node_id":"MDQ6VXNlcjM2MTk3NjE=","avatar_url":"https://avatars2.githubusercontent.com/u/3619761?v=4","gravatar_id":"","url":"https://api.github.com/users/mbuesch","html_url":"https://github.com/mbuesch","followers_url":"https://api.github.com/users/mbuesch/followers","following_url":"https://api.github.com/users/mbuesch/following{/other_user}","gists_url":"https://api.github.com/users/mbuesch/gists{/gist_id}","starred_url":"https://api.github.com/users/mbuesch/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mbuesch/subscriptions","organizations_url":"https://api.github.com/users/mbuesch/orgs","repos_url":"https://api.github.com/users/mbuesch/repos","events_url":"https://api.github.com/users/mbuesch/events{/privacy}","received_events_url":"https://api.github.com/users/mbuesch/received_events","type":"User","site_admin":false},"labels":[{"id":135946,"node_id":"MDU6TGFiZWwxMzU5NDY=","url":"https://api.github.com/repos/bitcoin/bitcoin/labels/GUI","name":"GUI","color":"02d7e1","default":false}],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":5,"created_at":"2018-09-30T16:42:32Z","updated_at":"2018-10-03T06:45:15Z","closed_at":null,"author_association":"NONE","body":"When I run bitcoin-qt it does not properly start up and hangs in futex():\r\n\r\nThe last calls shown in strace are:\r\n```\r\nfutex(0x7f3f7bfd77e4, FUTEX_WAKE_PRIVATE, 2147483647) = 0\r\nfutex(0x7f3f7d812c60, FUTEX_WAIT, 65792, NULL\r\n```\r\n\r\ngdb shows:\r\n\r\n```\r\n(gdb) bt\r\n#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38\r\n#1  0x00007ffff5e26d2f in __cxa_guard_acquire () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6\r\n#2  0x00007ffff7e06dcc in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Network.so.5\r\n#3  0x00007ffff7e0b706 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Network.so.5\r\n#4  0x00007ffff7e2af21 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Network.so.5\r\n#5  0x00007ffff7e32080 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Network.so.5\r\n#6  0x00007ffff7df1c67 in QSslCertificate::QSslCertificate(QByteArray const&, QSsl::EncodingFormat) ()                                                                                        \r\n   from /usr/lib/x86_64-linux-gnu/libQt5Network.so.5\r\n#7  0x00007ffff7e07fe6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Network.so.5\r\n#8  0x00007ffff7dfb09d in QSslConfiguration::defaultConfiguration() () from /usr/lib/x86_64-linux-gnu/libQt5Network.so.5                                                                      \r\n#9  0x000055555564841f in main () at qt/bitcoin.cpp:579\r\n#10 0x00007ffff5a49b17 in __libc_start_main (main=0x555555648380 <main>, argc=1, argv=0x7fffffffdcc8, init=<optimized out>, fini=<optimized out>,                                             \r\n    rtld_fini=<optimized out>, stack_end=0x7fffffffdcb8) at ../csu/libc-start.c:310\r\n#11 0x0000555555657dca in _start () at /usr/include/c++/8/ext/new_allocator.h:116\r\n```\r\n\r\nI understand that this might also be a problem in Qt rather than bitcoin-qt.\r\nBut other Qt applications do not show this problem. So I'd be happy to get any hint to debug this further.\r\n\r\nThanks!\r\n"},"comment":{"url":"https://api.github.com/repos/bitcoin/bitcoin/issues/comments/426528871","html_url":"https://github.com/bitcoin/bitcoin/issues/14359#issuecomment-426528871","issue_url":"https://api.github.com/repos/bitcoin/bitcoin/issues/14359","id":426528871,"node_id":"MDEyOklzc3VlQ29tbWVudDQyNjUyODg3MQ==","user":{"login":"zquestz","id":83898,"node_id":"MDQ6VXNlcjgzODk4","avatar_url":"https://avatars3.githubusercontent.com/u/83898?v=4","gravatar_id":"","url":"https://api.github.com/users/zquestz","html_url":"https://github.com/zquestz","followers_url":"https://api.github.com/users/zquestz/followers","following_url":"https://api.github.com/users/zquestz/following{/other_user}","gists_url":"https://api.github.com/users/zquestz/gists{/gist_id}","starred_url":"https://api.github.com/users/zquestz/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/zquestz/subscriptions","organizations_url":"https://api.github.com/users/zquestz/orgs","repos_url":"https://api.github.com/users/zquestz/repos","events_url":"https://api.github.com/users/zquestz/events{/privacy}","received_events_url":"https://api.github.com/users/zquestz/received_events","type":"User","site_admin":false},"created_at":"2018-10-03T06:45:15Z","updated_at":"2018-10-03T06:45:15Z","author_association":"NONE","body":"@mbuesch thanks a bunch for the patch. Worked for me. =)"}}
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