Fluxbox / Bugs / #1126 Fluxbox crashes sporadically

Description has changed:

Diff:

--- old
+++ new
@@ -1,156 +1,157 @@
 Fluxbox crashes when I'm not even at my computer. The only other program running is pidgin-2.10.10 . It may be related. A backtrace is pasted below:

-(gdb) bt full
-#0  0xb772bc6c in __kernel_vsyscall ()
-No symbol table info available.
-#1  0xb7231ac2 in raise () from /lib/libc.so.6
-No symbol table info available.
-#2  0xb72332ac in abort () from /lib/libc.so.6
-No symbol table info available.
-#3  0x080d0df5 in (anonymous namespace)::handleSignal (signum=11) at src/main.cc:134

-        i18n = @0x817e308: {
-          m_locale = "C\000la\030\000\000\000\031\000\000\000\a\000\000\000\a\000\000\000\000\000\000\000iconify\000!\000\000\000\001\000\000\000h@[\b0B[\b\020A[\b\354A[\b`k\006\bow\000\000!\000\000\000\000\000\000\000\360@[\b\000\000\000\000\000\000\000\000<A[\b`k\006\bow\000\000!\000\000\000\016\000\000\000\016\000\000\000\000\000\000\000maximizewindow\000\000!\000\000\000\001\000\000\000hB[\b\210O[\b\250E[\b|A[\b`k\006\b\000\000\000\000!\000\000\000\b\000\000\000\b\000\000\000\000\000\000\000maximize\000\000\000\000\000\000\000\000\031\000\000\000\300h[\b"...,
-          m_multibyte = false, m_utf8_translate = false}
-        re_enter = 0
-#4  <signal handler called>
-No symbol table info available.
-#5  0xb7459ac3 in std::_Rb_tree_rebalance_for_erase(std::_Rb_tree_node_base*, std::_Rb_tree_node_base&) () from /usr/lib/gcc/i686-pc-linux-gnu/4.8.3/libstdc++.so.6
-No symbol table info available.
-#6  0x0810a1e8 in _M_erase_aux (__position=..., this=0x817e1e0 <FbTk::EventManager::instance()::ev>) at /usr/lib/gcc/i686-pc-linux-gnu/4.8.3/include/g++-v4/bits/stl_tree.h:1745
-        __y = <optimized out>
-#7  erase (__position=..., this=0x817e1e0 <FbTk::EventManager::instance()::ev>) at /usr/lib/gcc/i686-pc-linux-gnu/4.8.3/include/g++-v4/bits/stl_tree.h:830
-No locals.
-#8  _M_erase_aux (__last=..., __first=..., this=0x817e1e0 <FbTk::EventManager::instance()::ev>) at /usr/lib/gcc/i686-pc-linux-gnu/4.8.3/include/g++-v4/bits/stl_tree.h:1760
-No locals.
-#9  erase (__last=..., __first=..., this=0x817e1e0 <FbTk::EventManager::instance()::ev>) at /usr/lib/gcc/i686-pc-linux-gnu/4.8.3/include/g++-v4/bits/stl_tree.h:848
-No locals.
-#10 std::_Rb_tree<unsigned long, std::pair<unsigned long const, FbTk::EventHandler*>, std::_Select1st<std::pair<unsigned long const, FbTk::EventHandler*> >, std::less<unsigned long>, std::allocator<std::pair<unsigned long const, FbTk::EventHandler*> > >::erase (this=this@entry=0x817e1e0 <FbTk::EventManager::instance()::ev>, __x=@0xbf862a34: 10485938)
-    at /usr/lib/gcc/i686-pc-linux-gnu/4.8.3/include/g++-v4/bits/stl_tree.h:1771
-        __p = {first = <error reading variable>
-#11 0x08109c30 in erase (__x=@0xbf862a34: 10485938, this=0x817e1e0 <FbTk::EventManager::instance()::ev>) at /usr/lib/gcc/i686-pc-linux-gnu/4.8.3/include/g++-v4/bits/stl_map.h:727
-No locals.
-#12 FbTk::EventManager::unregisterEventHandler (this=0x817e1e0 <FbTk::EventManager::instance()::ev>, win=win@entry=10485938) at src/FbTk/EventManager.cc:137
-No locals.
-#13 0x0810e654 in remove (win=10485938, this=<optimized out>) at src/FbTk/EventManager.hh:46
-No locals.
-#14 FbTk::FbWindow::~FbWindow (this=0x8671a70, __in_chrg=<optimized out>) at src/FbTk/FbWindow.cc:144
-No locals.
-#15 0x08105b47 in SystemTray::~SystemTray (this=0x86719c0, __in_chrg=<optimized out>) at src/SystemTray.cc:216
-No locals.
-#16 0x08105f20 in SystemTray::~SystemTray (this=0x86719c0, __in_chrg=<optimized out>) at src/SystemTray.cc:234
-No locals.
-#17 0x080f9cc5 in Toolbar::deleteItems (this=this@entry=0x86685f8) at src/Toolbar.cc:982
-No locals.
-#18 0x080fbe8d in Toolbar::~Toolbar (this=0x86685f8, __in_chrg=<optimized out>) at src/Toolbar.cc:286
-No locals.
-#19 0x080fc940 in Toolbar::~Toolbar (this=0x86685f8, __in_chrg=<optimized out>) at src/Toolbar.cc:291
-No locals.
-#20 0x0809c992 in reset (__p=0x0, this=0x85e7488) at /usr/lib/gcc/i686-pc-linux-gnu/4.8.3/include/g++-v4/backward/auto_ptr.h:244
-No locals.
-#21 BScreen::~BScreen (this=0x85e72c8, __in_chrg=<optimized out>) at src/Screen.cc:394
----Type <return> to continue, or q <return> to quit---
-        evm = <optimized out>
-        tmp = std::list = {[0] = 0x0<error reading variable: Cannot access memory at address 0x1>...}
-#22 0x0809d4e0 in BScreen::~BScreen (this=0x85e72c8, __in_chrg=<optimized out>) at src/Screen.cc:447
-No locals.
-Python Exception <type 'exceptions.IndexError'> list index out of range:
-#23 0x080cc707 in destroyAndClear<std::list<BScreen*> > (a=std::list) at src/FbTk/STLUtil.hh:55
-        it =
-#24 Fluxbox::~Fluxbox (this=0x85d9690, __in_chrg=<optimized out>) at src/fluxbox.cc:481
-No locals.
-#25 0x080ccbb0 in Fluxbox::~Fluxbox (this=0x85d9690, __in_chrg=<optimized out>) at src/fluxbox.cc:484
-No locals.
-#26 0xb7234a87 in ?? () from /lib/libc.so.6
-No symbol table info available.
-#27 0xb7234af0 in exit () from /lib/libc.so.6
-No symbol table info available.
-#28 0x080c6fa3 in (anonymous namespace)::handleXIOErrors (d=0x85d58d0) at src/fluxbox.cc:165
-No locals.
-#29 0xb7533457 in _XIOError () from /usr/lib/libX11.so.6
-No symbol table info available.
-#30 0xb753123e in _XReply () from /usr/lib/libX11.so.6
-No symbol table info available.
-#31 0xb7515294 in XGetGeometry () from /usr/lib/libX11.so.6
-No symbol table info available.
-#32 0x0810ad29 in FbTk::FbPixmap::copy (this=this@entry=0x86932f0, pm=11903305, depth=depth@entry=0, screen_num=screen_num@entry=0) at src/FbTk/FbPixmap.cc:186
-        root = 1067289049
-        y = 13
-        new_width = 141368432
-        new_height = 135549256
-        gc = <optimized out>
-        x = 14
-        border_width = 0
-        bpp = 135550008
-#33 0x08081e26 in IconButton::refreshEverything (this=0x86931b8, setup=false) at src/IconButton.cc:213
-        screen = <optimized out>
-#34 0x08109187 in FbTk::Container::repositionItems (this=0x8686b34) at src/FbTk/Container.cc:407
-        next_x = 136
-        tmpw = <optimized out>
-        max_width_per_client = 135
-        rounding_error = 1
-        tmpx = 136
-        tmph = <optimized out>
-        num_items = <optimized out>
-        total_width = 682
-        cur_width = 682
-        direction = <optimized out>
-        tmpy = -1
-        height = 15
-        it =
-Python Exception <type 'exceptions.ValueError'> Cannot find type const std::list<FbTk::Button*, std::allocator<FbTk::Button*> >::iterator::_Node:
-        it_end =
-        extra = 1
-#35 0x08109468 in FbTk::Container::moveResize (this=this@entry=0x8686b34, x=x@entry=0, y=0, width=width@entry=682, height=height@entry=15) at src/FbTk/Container.cc:65
----Type <return> to continue, or q <return> to quit---
-No locals.
-#36 0x08074442 in FbWinFrame::reconfigureTitlebar (this=this@entry=0x8686a84) at src/FbWinFrame.cc:1031
-        orig_height = <optimized out>
-        title_height = <optimized out>
-        next_x = 0
-        space_left = <optimized out>
-#37 0x080745c3 in FbWinFrame::reconfigure (this=this@entry=0x8686a84) at src/FbWinFrame.cc:864
-        grav_x = 0
-        grav_y = 0
-        orig_handle_h = <optimized out>
-#38 0x0807597e in reconfigure (this=0x8686a84) at src/FbWinFrame.cc:844
-No locals.
-#39 FbWinFrame::applyDecorations (this=this@entry=0x8686a84, do_move=do_move@entry=true) at src/FbWinFrame.cc:1357
-        grav_x = 0
-        grav_y = 0
-        client_move = false
-#40 0x080b2fce in FluxboxWindow::themeReconfigured (this=0x86866d0) at src/Window.cc:2639
-No locals.
-#41 0x0808320f in FbTk::Signal<FbTk::SigImpl::EmptyArg, FbTk::SigImpl::EmptyArg, FbTk::SigImpl::EmptyArg>::emit (this=0x86869e8) at src/FbTk/Signal.hh:210
-        it = {m_data = , m_refcount = }
-#42 0x080aefcb in emit (arg=..., this=0x8686724) at src/FbTk/Signal.hh:185
-        it = {m_data = , m_refcount = }
-#43 Focusable::setAttentionState (this=0x86866d0, value=true) at src/Focusable.hh:66
-No locals.
-#44 0x080ad89d in WinClient::setAttentionState (this=0x8692ed0, value=true) at src/WinClient.cc:547
-        value = true
-        this = 0x8692ed0
-#45 0x080575b3 in (anonymous namespace)::ToggleFrameFocusCmd::execute (this=0x86d5080) at src/AttentionNoticeHandler.cc:40
-No locals.
-#46 0x08133642 in fireTimeout (this=0x8690110) at src/FbTk/Timer.cc:147
-No locals.
-#47 FbTk::Timer::updateTimers (fd=6) at src/FbTk/Timer.cc:216
-        timer = @0x8690110: {m_handler = {m_data = 0x86d5080, m_refcount = 0x86bea60}, m_once = false, m_interval = 0, m_start = 372361781857, m_timeout = 333000}
-        tout = <optimized out>
-        timeouts = std::vector of length 1, capacity 4 = {0x0}
-        i = 0
-        rfds = {fds_bits = {0 <repeats 32 times>}}
-        tm = {tv_sec = 0, tv_usec = 0}
-        t = <optimized out>
-        now = <optimized out>
-#48 0x080c8373 in Fluxbox::eventLoop (this=0x85d9690) at src/fluxbox.cc:542
-No locals.
-#49 0x08052529 in main (argc=3, argv=0xbf863484) at src/main.cc:211
-        opts = {session_display = ":0", rc_path = "/home/mark/.fluxbox", rc_file = "/home/mark/.fluxbox/init", log_filename = "/home/mark/.fluxbox/log", xsync = false}
-        errbuf = <optimized out>
-        i18n = <optimized out>
-        exitcode = 1
-        outbuf = <optimized out>
-        log_file = <incomplete type>
-        restarting = <optimized out>
----Type <return> to continue, or q <return> to quit---
-        restart_argument = <error reading variable: Cannot access memory at address 0xfffffff3>
+    (gdb) bt full
+    #0  0xb772bc6c in __kernel_vsyscall ()
+    No symbol table info available.
+    #1  0xb7231ac2 in raise () from /lib/libc.so.6
+    No symbol table info available.
+    #2  0xb72332ac in abort () from /lib/libc.so.6
+    No symbol table info available.
+    #3  0x080d0df5 in (anonymous namespace)::handleSignal (signum=11) at src/main.cc:134
+            i18n = @0x817e308: {
+              m_locale = "C\000la\030\000\000\000\031\000\000\000\a\000\000\000\a\000\000\000\000\000\000\000iconify\000!\000\000\000\001\000\000\000h@[\b0B[\b\020A[\b\354A[\b`k\006\bow\000\000!\000\000\000\000\000\000\000\360@[\b\000\000\000\000\000\000\000\000<A[\b`k\006\bow\000\000!\000\000\000\016\000\000\000\016\000\000\000\000\000\000\000maximizewindow\000\000!\000\000\000\001\000\000\000hB[\b\210O[\b\250E[\b|A[\b`k\006\b\000\000\000\000!\000\000\000\b\000\000\000\b\000\000\000\000\000\000\000maximize\000\000\000\000\000\000\000\000\031\000\000\000\300h[\b"...,
+              m_multibyte = false, m_utf8_translate = false}
+            re_enter = 0
+    #4  <signal handler called>
+    No symbol table info available.
+    #5  0xb7459ac3 in std::_Rb_tree_rebalance_for_erase(std::_Rb_tree_node_base*, std::_Rb_tree_node_base&) () from /usr/lib/gcc/i686-pc-linux-gnu/4.8.3/libstdc++.so.6
+    No symbol table info available.
+    #6  0x0810a1e8 in _M_erase_aux (__position=..., this=0x817e1e0 <FbTk::EventManager::instance()::ev>) at /usr/lib/gcc/i686-pc-linux-gnu/4.8.3/include/g++-v4/bits/stl_tree.h:1745
+            __y = <optimized out>
+    #7  erase (__position=..., this=0x817e1e0 <FbTk::EventManager::instance()::ev>) at /usr/lib/gcc/i686-pc-linux-gnu/4.8.3/include/g++-v4/bits/stl_tree.h:830
+    No locals.
+    #8  _M_erase_aux (__last=..., __first=..., this=0x817e1e0 <FbTk::EventManager::instance()::ev>) at /usr/lib/gcc/i686-pc-linux-gnu/4.8.3/include/g++-v4/bits/stl_tree.h:1760
+    No locals.
+    #9  erase (__last=..., __first=..., this=0x817e1e0 <FbTk::EventManager::instance()::ev>) at /usr/lib/gcc/i686-pc-linux-gnu/4.8.3/include/g++-v4/bits/stl_tree.h:848
+    No locals.
+    #10 std::_Rb_tree<unsigned long, std::pair<unsigned long const, FbTk::EventHandler*>, std::_Select1st<std::pair<unsigned long const, FbTk::EventHandler*> >, std::less<unsigned long>, std::allocator<std::pair<unsigned long const, FbTk::EventHandler*> > >::erase (this=this@entry=0x817e1e0 <FbTk::EventManager::instance()::ev>, __x=@0xbf862a34: 10485938)
+        at /usr/lib/gcc/i686-pc-linux-gnu/4.8.3/include/g++-v4/bits/stl_tree.h:1771
+            __p = {first = <error reading variable>
+    #11 0x08109c30 in erase (__x=@0xbf862a34: 10485938, this=0x817e1e0 <FbTk::EventManager::instance()::ev>) at /usr/lib/gcc/i686-pc-linux-gnu/4.8.3/include/g++-v4/bits/stl_map.h:727
+    No locals.
+    #12 FbTk::EventManager::unregisterEventHandler (this=0x817e1e0 <FbTk::EventManager::instance()::ev>, win=win@entry=10485938) at src/FbTk/EventManager.cc:137
+    No locals.
+    #13 0x0810e654 in remove (win=10485938, this=<optimized out>) at src/FbTk/EventManager.hh:46
+    No locals.
+    #14 FbTk::FbWindow::~FbWindow (this=0x8671a70, __in_chrg=<optimized out>) at src/FbTk/FbWindow.cc:144
+    No locals.
+    #15 0x08105b47 in SystemTray::~SystemTray (this=0x86719c0, __in_chrg=<optimized out>) at src/SystemTray.cc:216
+    No locals.
+    #16 0x08105f20 in SystemTray::~SystemTray (this=0x86719c0, __in_chrg=<optimized out>) at src/SystemTray.cc:234
+    No locals.
+    #17 0x080f9cc5 in Toolbar::deleteItems (this=this@entry=0x86685f8) at src/Toolbar.cc:982
+    No locals.
+    #18 0x080fbe8d in Toolbar::~Toolbar (this=0x86685f8, __in_chrg=<optimized out>) at src/Toolbar.cc:286
+    No locals.
+    #19 0x080fc940 in Toolbar::~Toolbar (this=0x86685f8, __in_chrg=<optimized out>) at src/Toolbar.cc:291
+    No locals.
+    #20 0x0809c992 in reset (__p=0x0, this=0x85e7488) at /usr/lib/gcc/i686-pc-linux-gnu/4.8.3/include/g++-v4/backward/auto_ptr.h:244
+    No locals.
+    #21 BScreen::~BScreen (this=0x85e72c8, __in_chrg=<optimized out>) at src/Screen.cc:394
+    ---Type <return> to continue, or q <return> to quit---
+            evm = <optimized out>
+            tmp = std::list = {[0] = 0x0<error reading variable: Cannot access memory at address 0x1>...}
+    #22 0x0809d4e0 in BScreen::~BScreen (this=0x85e72c8, __in_chrg=<optimized out>) at src/Screen.cc:447
+    No locals.
+    Python Exception <type 'exceptions.IndexError'> list index out of range:
+    #23 0x080cc707 in destroyAndClear<std::list<BScreen*> > (a=std::list) at src/FbTk/STLUtil.hh:55
+            it =
+    #24 Fluxbox::~Fluxbox (this=0x85d9690, __in_chrg=<optimized out>) at src/fluxbox.cc:481
+    No locals.
+    #25 0x080ccbb0 in Fluxbox::~Fluxbox (this=0x85d9690, __in_chrg=<optimized out>) at src/fluxbox.cc:484
+    No locals.
+    #26 0xb7234a87 in ?? () from /lib/libc.so.6
+    No symbol table info available.
+    #27 0xb7234af0 in exit () from /lib/libc.so.6
+    No symbol table info available.
+    #28 0x080c6fa3 in (anonymous namespace)::handleXIOErrors (d=0x85d58d0) at src/fluxbox.cc:165
+    No locals.
+    #29 0xb7533457 in _XIOError () from /usr/lib/libX11.so.6
+    No symbol table info available.
+    #30 0xb753123e in _XReply () from /usr/lib/libX11.so.6
+    No symbol table info available.
+    #31 0xb7515294 in XGetGeometry () from /usr/lib/libX11.so.6
+    No symbol table info available.
+    #32 0x0810ad29 in FbTk::FbPixmap::copy (this=this@entry=0x86932f0, pm=11903305, depth=depth@entry=0, screen_num=screen_num@entry=0) at src/FbTk/FbPixmap.cc:186
+            root = 1067289049
+            y = 13
+            new_width = 141368432
+            new_height = 135549256
+            gc = <optimized out>
+            x = 14
+            border_width = 0
+            bpp = 135550008
+    #33 0x08081e26 in IconButton::refreshEverything (this=0x86931b8, setup=false) at src/IconButton.cc:213
+            screen = <optimized out>
+    #34 0x08109187 in FbTk::Container::repositionItems (this=0x8686b34) at src/FbTk/Container.cc:407
+            next_x = 136
+            tmpw = <optimized out>
+            max_width_per_client = 135
+            rounding_error = 1
+            tmpx = 136
+            tmph = <optimized out>
+            num_items = <optimized out>
+            total_width = 682
+            cur_width = 682
+            direction = <optimized out>
+            tmpy = -1
+            height = 15
+            it =
+    Python Exception <type 'exceptions.ValueError'> Cannot find type const std::list<FbTk::Button*, std::allocator<FbTk::Button*> >::iterator::_Node:
+            it_end =
+            extra = 1
+    #35 0x08109468 in FbTk::Container::moveResize (this=this@entry=0x8686b34, x=x@entry=0, y=0, width=width@entry=682, height=height@entry=15) at src/FbTk/Container.cc:65
+    ---Type <return> to continue, or q <return> to quit---
+    No locals.
+    #36 0x08074442 in FbWinFrame::reconfigureTitlebar (this=this@entry=0x8686a84) at src/FbWinFrame.cc:1031
+            orig_height = <optimized out>
+            title_height = <optimized out>
+            next_x = 0
+            space_left = <optimized out>
+    #37 0x080745c3 in FbWinFrame::reconfigure (this=this@entry=0x8686a84) at src/FbWinFrame.cc:864
+            grav_x = 0
+            grav_y = 0
+            orig_handle_h = <optimized out>
+    #38 0x0807597e in reconfigure (this=0x8686a84) at src/FbWinFrame.cc:844
+    No locals.
+    #39 FbWinFrame::applyDecorations (this=this@entry=0x8686a84, do_move=do_move@entry=true) at src/FbWinFrame.cc:1357
+            grav_x = 0
+            grav_y = 0
+            client_move = false
+    #40 0x080b2fce in FluxboxWindow::themeReconfigured (this=0x86866d0) at src/Window.cc:2639
+    No locals.
+    #41 0x0808320f in FbTk::Signal<FbTk::SigImpl::EmptyArg, FbTk::SigImpl::EmptyArg, FbTk::SigImpl::EmptyArg>::emit (this=0x86869e8) at src/FbTk/Signal.hh:210
+            it = {m_data = , m_refcount = }
+    #42 0x080aefcb in emit (arg=..., this=0x8686724) at src/FbTk/Signal.hh:185
+            it = {m_data = , m_refcount = }
+    
+    #43 Focusable::setAttentionState (this=0x86866d0, value=true) at src/Focusable.hh:66
+    No locals.
+    #44 0x080ad89d in WinClient::setAttentionState (this=0x8692ed0, value=true) at src/WinClient.cc:547
+            value = true
+            this = 0x8692ed0
+    #45 0x080575b3 in (anonymous namespace)::ToggleFrameFocusCmd::execute (this=0x86d5080) at src/AttentionNoticeHandler.cc:40
+    No locals.
+    #46 0x08133642 in fireTimeout (this=0x8690110) at src/FbTk/Timer.cc:147
+    No locals.
+    #47 FbTk::Timer::updateTimers (fd=6) at src/FbTk/Timer.cc:216
+            timer = @0x8690110: {m_handler = {m_data = 0x86d5080, m_refcount = 0x86bea60}, m_once = false, m_interval = 0, m_start = 372361781857, m_timeout = 333000}
+            tout = <optimized out>
+            timeouts = std::vector of length 1, capacity 4 = {0x0}
+            i = 0
+            rfds = {fds_bits = {0 <repeats 32 times>}}
+            tm = {tv_sec = 0, tv_usec = 0}
+            t = <optimized out>
+            now = <optimized out>
+    #48 0x080c8373 in Fluxbox::eventLoop (this=0x85d9690) at src/fluxbox.cc:542
+    No locals.
+    #49 0x08052529 in main (argc=3, argv=0xbf863484) at src/main.cc:211
+            opts = {session_display = ":0", rc_path = "/home/mark/.fluxbox", rc_file = "/home/mark/.fluxbox/init", log_filename = "/home/mark/.fluxbox/log", xsync = false}
+            errbuf = <optimized out>
+            i18n = <optimized out>
+            exitcode = 1
+            outbuf = <optimized out>
+            log_file = <incomplete type>
+            restarting = <optimized out>
+    ---Type <return> to continue, or q <return> to quit---
+            restart_argument = <error reading variable: Cannot access memory at address 0xfffffff3>

Thomas Luebking - 2016-07-25

Segfaults because of trying to exit on XIOerror (no good idea, see eg. https://bugs.kde.org/show_bug.cgi?id=112960#c12 )

Question remains on why ther IOError occurred itfp.
Usually this means the X server crashed.

If this is still a problem, one should check on that.
=> Did the X server survive those crashes?

Otherwise the bug can more or less be closed.
Crashing in return of an XIOerror (for an X11 crash) isn't nice, but not a critical bug per se (the problem is the crashing X server, it takes fluxbox down anyway - whether the latter segfaults or not)

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- Mark Tiefenbruck - 2016-07-25
  
  I don't leave my computer on all the time anymore, so I don't really know
  if it still happens. Also, my git checkout is so old that it wouldn't give
  any valuable information. However, it definitely did not result from an X
  server crash, since it was still running after these crashes (my
  .fluxbox/startup restarts fluxbox when it crashes).
  
  Thanks for all the recent work!
  
  Mark
  
  On Mon, Jul 25, 2016 at 2:20 PM, Thomas Luebking <baghira-style@users.sf.net
  
  wrote:
  
  Segfaults because of trying to exit on XIOerror (no good idea, see eg.
  https://bugs.kde.org/show_bug.cgi?id=112960#c12 )
  
  Question remains on why ther IOError occurred itfp.
  Usually this means the X server crashed.
  
  If this is still a problem, one should check on that.
  => Did the X server survive those crashes?
  
  Otherwise the bug can more or less be closed.
  Crashing in return of an XIOerror (for an X11 crash) isn't nice, but not a
  critical bug per se (the problem is the crashing X server, it takes fluxbox
  down anyway - whether the latter segfaults or not)
  
  [bugs:#1126] https://sourceforge.net/p/fluxbox/bugs/1126/ Fluxbox
  crashes sporadically*
  
  Status: open
  Group: future release
  Created: Fri Feb 06, 2015 06:20 AM UTC by Mark Tiefenbruck
  Last Updated: Sat Feb 21, 2015 06:49 AM UTC
  Owner: nobody
  
  Fluxbox crashes when I'm not even at my computer. The only other program
  running is pidgin-2.10.10 . It may be related. A backtrace is pasted below:
  
  (gdb) bt full#0 0xb772bc6c in __kernel_vsyscall ()No symbol table info available.#1 0xb7231ac2 in raise () from /lib/libc.so.6No symbol table info available.#2 0xb72332ac in abort () from /lib/libc.so.6No symbol table info available.#3 0x080d0df5 in (anonymous namespace)::handleSignal (signum=11) at src/main.cc:134
  i18n = @0x817e308: {
  m_locale = "C\000la\030\000\000\000\031\000\000\000\a\000\000\000\a\000\000\000\000\000\000\000iconify\000!\000\000\000\001\000\000\000h@[\b0B[\b\020A[\b\354A[\bk\006\bow\000\000!\000\000\000\000\000\000\000\360@[\b\000\000\000\000\000\000\000\000<A[\bk\006\bow\000\000!\000\000\000\016\000\000\000\016\000\000\000\000\000\000\000maximizewindow\000\000!\000\000\000\001\000\000\000hB[\b\210O[\b\250E[\b|A[\b`k\006\b\000\000\000\000!\000\000\000\b\000\000\000\b\000\000\000\000\000\000\000maximize\000\000\000\000\000\000\000\000\031\000\000\000\300h[\b"...,
  m_multibyte = false, m_utf8_translate = false}
  re_enter = 0#4 <signal handler="" called="">No symbol table info available.#5 0xb7459ac3 in std::_Rb_tree_rebalance_for_erase(std::_Rb_tree_node_base*, std::_Rb_tree_node_base&) () from /usr/lib/gcc/i686-pc-linux-gnu/4.8.3/libstdc++.so.6No symbol table info available.#6 0x0810a1e8 in _M_erase_aux (__position=..., this=0x817e1e0 <fbtk::eventmanager::instance()::ev>) at /usr/lib/gcc/i686-pc-linux-gnu/4.8.3/include/g++-v4/bits/stl_tree.h:1745
  __y = <optimized out="">#7 erase (__position=..., this=0x817e1e0 <fbtk::eventmanager::instance()::ev>) at /usr/lib/gcc/i686-pc-linux-gnu/4.8.3/include/g++-v4/bits/stl_tree.h:830No locals.#8 _M_erase_aux (__last=..., __first=..., this=0x817e1e0 <fbtk::eventmanager::instance()::ev>) at /usr/lib/gcc/i686-pc-linux-gnu/4.8.3/include/g++-v4/bits/stl_tree.h:1760No locals.#9 erase (__last=..., __first=..., this=0x817e1e0 <fbtk::eventmanager::instance()::ev>) at /usr/lib/gcc/i686-pc-linux-gnu/4.8.3/include/g++-v4/bits/stl_tree.h:848No locals.#10 std::_Rb_tree<unsigned long,="" std::pair\<unsigned="" long="" const,="" fbtk::eventhandler*="">, std::_Select1st\<std::pair\<unsigned long="" const,="" fbtk::eventhandler*=""> >, std::less\<unsigned long="">, std::allocator\<std::pair\<unsigned long="" const,="" fbtk::eventhandler*=""> > >::erase (this=this@entry=0x817e1e0 <fbtk::eventmanager::instance()::ev>, __x=@0xbf862a34: 10485938)
  at /usr/lib/gcc/i686-pc-linux-gnu/4.8.3/include/g++-v4/bits/stl_tree.h:1771
  __p = {first = <error reading="" variable="">#11 0x08109c30 in erase (__x=@0xbf862a34: 10485938, this=0x817e1e0 <fbtk::eventmanager::instance()::ev>) at /usr/lib/gcc/i686-pc-linux-gnu/4.8.3/include/g++-v4/bits/stl_map.h:727No locals.#12 FbTk::EventManager::unregisterEventHandler (this=0x817e1e0 <fbtk::eventmanager::instance()::ev>, win=win@entry=10485938) at src/FbTk/EventManager.cc:137No locals.#13 0x0810e654 in remove (win=10485938, this=<optimized out="">) at src/FbTk/EventManager.hh:46No locals.#14 FbTk::FbWindow::~FbWindow (this=0x8671a70, __in_chrg=<optimized out="">) at src/FbTk/FbWindow.cc:144No locals.#15 0x08105b47 in SystemTray::~SystemTray (this=0x86719c0, __in_chrg=<optimized out="">) at src/SystemTray.cc:216No locals.#16 0x08105f20 in SystemTray::~SystemTray (this=0x86719c0, __in_chrg=<optimized out="">) at src/SystemTray.cc:234No locals.#17 0x080f9cc5 in Toolbar::deleteItems (this=this@entry=0x86685f8) at src/Toolbar.cc:982No locals.#18 0x080fbe8d in Toolbar::~Toolbar (this=0x86685f8, __in_chrg=<optimized out="">) at src/Toolbar.cc:286No locals.#19 0x080fc940 in Toolbar::~Toolbar (this=0x86685f8, __in_chrg=<optimized out="">) at src/Toolbar.cc:291No locals.#20 0x0809c992 in reset (__p=0x0, this=0x85e7488) at /usr/lib/gcc/i686-pc-linux-gnu/4.8.3/include/g++-v4/backward/auto_ptr.h:244No locals.#21 BScreen::~BScreen (this=0x85e72c8, __in_chrg=<optimized out="">) at src/Screen.cc:394---Type <return> to continue, or q <return> to quit---
  evm = <optimized out="">
  tmp = std::list = {[0] = 0x0<error reading="" variable:="" cannot="" access="" memory="" at="" address="" 0x1="">...}#22 0x0809d4e0 in BScreen::~BScreen (this=0x85e72c8, __in_chrg=<optimized out="">) at src/Screen.cc:447No locals.Python Exception <type 'exceptions.indexerror'=""> list index out of range:#23 0x080cc707 in destroyAndClear<std::list\<bscreen*> > (a=std::list) at src/FbTk/STLUtil.hh:55
  it =#24 Fluxbox::~Fluxbox (this=0x85d9690, __in_chrg=<optimized out="">) at src/fluxbox.cc:481No locals.#25 0x080ccbb0 in Fluxbox::~Fluxbox (this=0x85d9690, __in_chrg=<optimized out="">) at src/fluxbox.cc:484No locals.#26 0xb7234a87 in ?? () from /lib/libc.so.6No symbol table info available.#27 0xb7234af0 in exit () from /lib/libc.so.6No symbol table info available.#28 0x080c6fa3 in (anonymous namespace)::handleXIOErrors (d=0x85d58d0) at src/fluxbox.cc:165No locals.#29 0xb7533457 in _XIOError () from /usr/lib/libX11.so.6No symbol table info available.#30 0xb753123e in _XReply () from /usr/lib/libX11.so.6No symbol table info available.#31 0xb7515294 in XGetGeometry () from /usr/lib/libX11.so.6No symbol table info available.#32 0x0810ad29 in FbTk::FbPixmap::copy (this=this@entry=0x86932f0, pm=11903305, depth=depth@entry=0, screen_num=screen_num@entry=0) at src/FbTk/FbPixmap.cc:186
  root = 1067289049
  y = 13
  new_width = 141368432
  new_height = 135549256
  gc = <optimized out="">
  x = 14
  border_width = 0
  bpp = 135550008#33 0x08081e26 in IconButton::refreshEverything (this=0x86931b8, setup=false) at src/IconButton.cc:213
  screen = <optimized out="">#34 0x08109187 in FbTk::Container::repositionItems (this=0x8686b34) at src/FbTk/Container.cc:407
  next_x = 136
  tmpw = <optimized out="">
  max_width_per_client = 135
  rounding_error = 1
  tmpx = 136
  tmph = <optimized out="">
  num_items = <optimized out="">
  total_width = 682
  cur_width = 682
  direction = <optimized out="">
  tmpy = -1
  height = 15
  it =Python Exception <type 'exceptions.valueerror'=""> Cannot find type const std::list<fbtk::button*, std::allocator\<fbtk::button*=""> >::iterator::_Node:
  it_end =
  extra = 1#35 0x08109468 in FbTk::Container::moveResize (this=this@entry=0x8686b34, x=x@entry=0, y=0, width=width@entry=682, height=height@entry=15) at src/FbTk/Container.cc:65---Type <return> to continue, or q <return> to quit---No locals.#36 0x08074442 in FbWinFrame::reconfigureTitlebar (this=this@entry=0x8686a84) at src/FbWinFrame.cc:1031
  orig_height = <optimized out="">
  title_height = <optimized out="">
  next_x = 0
  space_left = <optimized out="">#37 0x080745c3 in FbWinFrame::reconfigure (this=this@entry=0x8686a84) at src/FbWinFrame.cc:864
  grav_x = 0
  grav_y = 0
  orig_handle_h = <optimized out="">#38 0x0807597e in reconfigure (this=0x8686a84) at src/FbWinFrame.cc:844No locals.#39 FbWinFrame::applyDecorations (this=this@entry=0x8686a84, do_move=do_move@entry=true) at src/FbWinFrame.cc:1357
  grav_x = 0
  grav_y = 0
  client_move = false#40 0x080b2fce in FluxboxWindow::themeReconfigured (this=0x86866d0) at src/Window.cc:2639No locals.#41 0x0808320f in FbTk::Signal<fbtk::sigimpl::emptyarg, fbtk::sigimpl::emptyarg,="" fbtk::sigimpl::emptyarg="">::emit (this=0x86869e8) at src/FbTk/Signal.hh:210
  it = {m_data = , m_refcount = }#42 0x080aefcb in emit (arg=..., this=0x8686724) at src/FbTk/Signal.hh:185
  it = {m_data = , m_refcount = }</fbtk::sigimpl::emptyarg,></optimized></optimized></optimized></optimized></return></return></fbtk::button*,></type></optimized></optimized></optimized></optimized></optimized></optimized></optimized></optimized></std::list\<bscreen*></type></optimized></error></optimized></return></return></optimized></optimized></optimized></optimized></optimized></optimized></optimized></fbtk::eventmanager::instance()::ev></fbtk::eventmanager::instance()::ev></error></fbtk::eventmanager::instance()::ev></std::pair\<unsigned></unsigned></std::pair\<unsigned></unsigned></fbtk::eventmanager::instance()::ev></fbtk::eventmanager::instance()::ev></fbtk::eventmanager::instance()::ev></optimized></fbtk::eventmanager::instance()::ev></signal>
  
  43 Focusable::setAttentionState (this=0x86866d0, value=true) at src/Focusable.hh:66No locals.#44 0x080ad89d in WinClient::setAttentionState (this=0x8692ed0, value=true) at src/WinClient.cc:547
  
  value = true this = 0x8692ed0#45 0x080575b3 in (anonymous namespace)::ToggleFrameFocusCmd::execute (this=0x86d5080) at src/AttentionNoticeHandler.cc:40No locals.#46 0x08133642 in fireTimeout (this=0x8690110) at src/FbTk/Timer.cc:147No locals.#47 FbTk::Timer::updateTimers (fd=6) at src/FbTk/Timer.cc:216 timer = @0x8690110: {m_handler = {m_data = 0x86d5080, m_refcount = 0x86bea60}, m_once = false, m_interval = 0, m_start = 372361781857, m_timeout = 333000} tout = <optimized out> timeouts = std::vector of length 1, capacity 4 = {0x0} i = 0 rfds = {fds_bits = {0 <repeats 32 times>}} tm = {tv_sec = 0, tv_usec = 0} t = <optimized out> now = <optimized out>#48 0x080c8373 in Fluxbox::eventLoop (this=0x85d9690) at src/fluxbox.cc:542No locals.#49 0x08052529 in main (argc=3, argv=0xbf863484) at src/main.cc:211 opts = {session_display = ":0", rc_path = "/home/mark/.fluxbox", rc_file = "/home/mark/.fluxbox/init", log_filename = "/home/mark/.fluxbox/log", xsync = false} errbuf = <optimized out> i18n = <optimized out> exitcode = 1 outbuf = <optimized out> log_file = <incomplete type> restarting = <optimized out>---Type <return> to continue, or q <return> to quit--- restart_argument = <error reading variable: Cannot access memory at address 0xfffffff3>
  
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Thomas Luebking - 2016-07-26

Then the server cuts the line because of an assaulting request from fluxbox (typically HUUUUGE image upload, but could plenty of things)

Interestingly, this seems to happen when some client goes urgent - from the description (and by its nature) this will be pidgin.

Does this cause trouble?

wmctrl -x -r "pidgin" -b add,demands_attention

(I've no idea whether pidgin is WM_CLASS for pidgin, so ensure this really sets the client urgent)

The used theme might be of relevance as well.
And the "DemandsAttentionTimeout" value in your ~/.fluxbox/init =)
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Fluxbox crashes sporadically

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#1126 Fluxbox crashes sporadically

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43 Focusable::setAttentionState (this=0x86866d0, value=true) at src/Focusable.hh:66No locals.#44 0x080ad89d in WinClient::setAttentionState (this=0x8692ed0, value=true) at src/WinClient.cc:547

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