Unforunatley, without debug symbols, these reports are incomprehensible.
If you got this as a package from your distro, is there a lyx-debuginfo
package, or something like that, that you could install?

Richard


On 12/17/2016 03:29 PM, Alexander Dunlap wrote:
> It happened again, with lyx 2.2.2, here's some data that was written
> in my systemd log:
>
> Dec 17 12:25:30 kulshan lyx.desktop[1192]: Buffer.cpp (1552):  
> /home/ajd/Documents/research/fpp/LFPPdiscrepancy3.lyx.emergency
> Dec 17 12:25:30 kulshan lyx.desktop[1192]: lyx: SIGSEGV signal caught!
> Dec 17 12:25:30 kulshan lyx.desktop[1192]: Sorry, you have found a bug
> in LyX, hope you have not lost any data.
> Dec 17 12:25:30 kulshan lyx.desktop[1192]: Please read the
> bug-reporting instructions in 'Help->Introduction' and send us a bug
> report, if necessary. Thanks!
> Dec 17 12:25:30 kulshan lyx.desktop[1192]: Bye.
> Dec 17 12:25:30 kulshan lyx.desktop[1192]: Error: LyX crashed!
> Dec 17 12:25:30 kulshan lyx.desktop[1192]:
> ----------------------------------------
> Dec 17 12:25:30 kulshan lyx.desktop[1192]: SIGSEGV signal caught!
> Dec 17 12:25:30 kulshan lyx.desktop[1192]: Sorry, you have found a bug
> in LyX, hope you have not lost any data.
> Dec 17 12:25:30 kulshan lyx.desktop[1192]: Please read the
> bug-reporting instructions in 'Help->Introduction' and send us a bug
> report, if necessary. Thanks!
> Dec 17 12:25:30 kulshan lyx.desktop[1192]: Bye.
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: (  1) lyx: lyx() [0x8de41f]
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: (  2) lyx: lyx() [0x9406ee]
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: (  3) lyx: lyx() [0x8dd0d0]
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: (  4) lyx: lyx() [0x5b6848]
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: (  5) /usr/lib/libc.so.6:
> /usr/lib/libc.so.6(+0x330b0) [0x7f0ec4e3a0b0]
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: (  6) /usr/lib/libc.so.6:
> /usr/lib/libc.so.6(+0x1289a4) [0x7f0ec4f2f9a4]
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: (  7)
> /usr/lib/libQt5Core.so.5: QByteArray::QByteArray(char const*, int)
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: (  8) lyx: lyx() [0x8ff34c]
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: (  9) lyx: lyx() [0x8ffa32]
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 10) lyx: lyx() [0x619c44]
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 11) lyx: lyx() [0x675c7b]
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 12) lyx: lyx() [0x6bdf51]
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 13) lyx: lyx() [0x6be5f0]
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 14) lyx: lyx() [0x8e3fc8]
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 15) lyx: lyx() [0x8e49c8]
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 16) lyx: lyx() [0x8e503b]
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 17) lyx: lyx() [0x932ecc]
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 18)
> /usr/lib/libQt5Widgets.so.5: QWidget::event(QEvent*)
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 19)
> /usr/lib/libQt5Widgets.so.5: QFrame::event(QEvent*)
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 20)
> /usr/lib/libQt5Widgets.so.5: QAbstractScrollArea::event(QEvent*)
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 21) lyx: lyx() [0x934c7d]
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 22)
> /usr/lib/libQt5Widgets.so.5:
> QApplicationPrivate::notify_helper(QObject*, QEvent*)
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 23)
> /usr/lib/libQt5Widgets.so.5: QApplication::notify(QObject*, QEvent*)
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 24) lyx: lyx() [0x8ef60c]
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 25)
> /usr/lib/libQt5Core.so.5: QCoreApplication::notifyInternal2(QObject*,
> QEvent*)
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 26)
> /usr/lib/libQt5Widgets.so.5: /usr/lib/libQt5Widgets.so.5(+0x1b775b)
> [0x7f0ec6c2f75b]
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 27)
> /usr/lib/libQt5Widgets.so.5:
> QApplicationPrivate::notify_helper(QObject*, QEvent*)
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 28)
> /usr/lib/libQt5Widgets.so.5: QApplication::notify(QObject*, QEvent*)
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 29) lyx: lyx() [0x8ef60c]
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 30)
> /usr/lib/libQt5Core.so.5: QCoreApplication::notifyInternal2(QObject*,
> QEvent*)
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 31)
> /usr/lib/libQt5Gui.so.5:
> QGuiApplicationPrivate::processKeyEvent(QWindowSystemInterfacePrivate::KeyEvent*)
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 32)
> /usr/lib/libQt5Gui.so.5:
> QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*)
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 33)
> /usr/lib/libQt5Gui.so.5:
> QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>)
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 34)
> /usr/lib/libQt5XcbQpa.so.5: /usr/lib/libQt5XcbQpa.so.5(+0x70390)
> [0x7f0ebbd92390]
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 35)
> /usr/lib/libglib-2.0.so.0:
> /usr/lib/libglib-2.0.so.0(g_main_context_dispatch+0x2a7) [0x7f0ec4732587]
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 36)
> /usr/lib/libglib-2.0.so.0: /usr/lib/libglib-2.0.so.0(+0x4a7f0)
> [0x7f0ec47327f0]
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 37)
> /usr/lib/libglib-2.0.so.0:
> /usr/lib/libglib-2.0.so.0(g_main_context_iteration+0x2c) [0x7f0ec473289c]
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 38)
> /usr/lib/libQt5Core.so.5:
> QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 39)
> /usr/lib/libQt5Core.so.5:
> QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 40)
> /usr/lib/libQt5Core.so.5: QCoreApplication::exec()
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 41) lyx: lyx() [0x5bec8d]
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 42) lyx: lyx() [0x4674a1]
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 43) /usr/lib/libc.so.6:
> /usr/lib/libc.so.6(__libc_start_main+0xf1) [0x7f0ec4e27291]
> Dec 17 12:25:31 kulshan lyx.desktop[1192]: ( 44) lyx: lyx() [0x47015a]
>
>
> Dec 17 12:25:57 kulshan systemd-coredump[10495]: Process 1192 (lyx) of
> user 1000 dumped core.
>                                                 
>                                                  Stack trace of thread
> 1192:
>                                                  #0 
> 0x00007f0ec4f2f9a4 __memmove_avx_unaligned_erms (libc.so.6)
>                                                  #1 
> 0x00007f0ec5d15730 _ZN10QByteArrayC2EPKci (libQt5Core.so.5)
>                                                  #2 
> 0x00000000008ff34c n/a (lyx)
>                                                  #3 
> 0x00000000008ffa32 n/a (lyx)
>                                                  #4 
> 0x0000000000619c44 n/a (lyx)
>                                                  #5 
> 0x0000000000675c7b n/a (lyx)
>                                                  #6 
> 0x0000000000675478 n/a (lyx)
>                                                  #7 
> 0x00000000006bd172 n/a (lyx)
>                                                  #8 
> 0x00000000006bd57e n/a (lyx)
>                                                  #9 
> 0x0000000000935212 n/a (lyx)
>                                                  #10
> 0x00000000009371dc n/a (lyx)
>                                                  #11
> 0x00000000008dcbf5 n/a (lyx)
>                                                  #12
> 0x00000000008dfd6c n/a (lyx)
>                                                  #13
> 0x00007f0ec5ee938f
> _ZN24QAbstractEventDispatcher17filterNativeEventERK10QByteArrayPvPl
> (libQt5Core.so.5)
>                                                  #14
> 0x00007f0ebbd5dc14
> _ZN14QXcbConnection14handleXcbEventEP19xcb_generic_event_t
> (libQt5XcbQpa.so.5)
>                                                  #15
> 0x00007f0ebbd5e8a5 _ZN14QXcbConnection16processXcbEventsEv
> (libQt5XcbQpa.so.5)
>                                                  #16
> 0x00007f0ec5f184c9 _ZN7QObject5eventEP6QEvent (libQt5Core.so.5)
>                                                  #17
> 0x00007f0ec6bcbe0c
> _ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent
> (libQt5Widgets.so.5)
>                                                  #18
> 0x00007f0ec6bd3581 _ZN12QApplication6notifyEP7QObjectP6QEvent
> (libQt5Widgets.so.5)
>                                                  #19
> 0x00000000008ef60c n/a (lyx)
>                                                  #20
> 0x00007f0ec5eebdf0
> _ZN16QCoreApplication15notifyInternal2EP7QObjectP6QEvent (libQt5Core.so.5)
>                                                  #21
> 0x00007f0ec5eee57d
> _ZN23QCoreApplicationPrivate16sendPostedEventsEP7QObjectiP11QThreadData
> (libQt5Core.so.5)
>                                                  #22
> 0x00007f0ec5f40313 n/a (libQt5Core.so.5)
>                                                  #23
> 0x00007f0ec4732587 g_main_context_dispatch (libglib-2.0.so.0)
>                                                  #24
> 0x00007f0ec47327f0 n/a (libglib-2.0.so.0)
>                                                  #25
> 0x00007f0ec473289c g_main_context_iteration (libglib-2.0.so.0)
>                                                  #26
> 0x00007f0ec5f4071f
> _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE
> (libQt5Core.so.5)
>                                                  #27
> 0x00007f0ec5eea24a
> _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5)
>                                                  #28
> 0x00007f0ec6db86b7 _ZN7QDialog4execEv (libQt5Widgets.so.5)
>                                                  #29
> 0x0000000000a7dcf0 n/a (lyx)
>                                                  #30
> 0x0000000000a7e08c n/a (lyx)
>                                                  #31
> 0x00007f0ec5f17669 _ZN11QMetaObject8activateEP7QObjectiiPPv
> (libQt5Core.so.5)
>                                                  #32
> 0x0000000000a7c75f n/a (lyx)
>                                                  #33
> 0x00000000008de347 n/a (lyx)
>                                                  #34
> 0x00000000009406ee n/a (lyx)
>                                                  #35
> 0x00000000008dd0d0 n/a (lyx)
>                                                  #36
> 0x00000000005b6848 n/a (lyx)
>                                                  #37
> 0x00007f0ec4e3a0b0 __restore_rt (libc.so.6)
>                                                  #38
> 0x00007f0ec4f2f9a4 __memmove_avx_unaligned_erms (libc.so.6)
>                                                  #39
> 0x00007f0ec5d15730 _ZN10QByteArrayC2EPKci (libQt5Core.so.5)
>                                                  #40
> 0x00000000008ff34c n/a (lyx)
>                                                  #41
> 0x00000000008ffa32 n/a (lyx)
>                                                  #42
> 0x0000000000619c44 n/a (lyx)
>                                                  #43
> 0x0000000000675c7b n/a (lyx)
>                                                  #44
> 0x00000000006bdf51 n/a (lyx)
>                                                  #45
> 0x00000000006be5f0 n/a (lyx)
>                                                  #46
> 0x00000000008e3fc8 n/a (lyx)
>                                                  #47
> 0x00000000008e49c8 n/a (lyx)
>                                                  #48
> 0x00000000008e503b n/a (lyx)
>                                                  #49
> 0x0000000000932ecc n/a (lyx)
>                                                  #50
> 0x00007f0ec6c13647 _ZN7QWidget5eventEP6QEvent (libQt5Widgets.so.5)
>                                                  #51
> 0x00007f0ec6cfa5fe _ZN6QFrame5eventEP6QEvent (libQt5Widgets.so.5)
>                                                  #52
> 0x00007f0ec6d83363 _ZN19QAbstractScrollArea5eventEP6QEvent
> (libQt5Widgets.so.5)
>                                                  #53
> 0x0000000000934c7d n/a (lyx)
>                                                  #54
> 0x00007f0ec6bcbe0c
> _ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent
> (libQt5Widgets.so.5)
>                                                  #55
> 0x00007f0ec6bd4f56 _ZN12QApplication6notifyEP7QObjectP6QEvent
> (libQt5Widgets.so.5)
>                                                  #56
> 0x00000000008ef60c n/a (lyx)
>                                                  #57
> 0x00007f0ec5eebdf0
> _ZN16QCoreApplication15notifyInternal2EP7QObjectP6QEvent (libQt5Core.so.5)
>                                                  #58
> 0x00007f0ec6c2f75b n/a (libQt5Widgets.so.5)
>                                                  #59
> 0x00007f0ec6bcbe0c
> _ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent
> (libQt5Widgets.so.5)
>                                                  #60
> 0x00007f0ec6bd3581 _ZN12QApplication6notifyEP7QObjectP6QEvent
> (libQt5Widgets.so.5)
>                                                  #61
> 0x00000000008ef60c n/a (lyx)
>                                                  #62
> 0x00007f0ec5eebdf0
> _ZN16QCoreApplication15notifyInternal2EP7QObjectP6QEvent (libQt5Core.so.5)
>                                                  #63
> 0x00007f0ec6436888
> _ZN22QGuiApplicationPrivate15processKeyEventEPN29QWindowSystemInterfacePrivate8KeyEventE
> (libQt5Gui.so.5)
>                                                 
>                                                  Stack trace of thread
> 1196:
>                                                  #0 
> 0x00007f0ec4ee648d poll (libc.so.6)
>                                                  #1 
> 0x00007f0ec4732786 n/a (libglib-2.0.so.0)
>                                                  #2 
> 0x00007f0ec473289c g_main_context_iteration (libglib-2.0.so.0)
>                                                  #3 
> 0x00007f0ec47328e1 n/a (libglib-2.0.so.0)
>                                                  #4 
> 0x00007f0ec475a0d5 n/a (libglib-2.0.so.0)
>                                                  #5 
> 0x00007f0ec51ac454 start_thread (libpthread.so.0)
>                                                  #6 
> 0x00007f0ec4eef7df __clone (libc.so.6)
>                                                 
>                                                  Stack trace of thread
> 1197:
>                                                  #0 
> 0x00007f0ec4ee648d poll (libc.so.6)
>                                                  #1 
> 0x00007f0ec4732786 n/a (libglib-2.0.so.0)
>                                                  #2 
> 0x00007f0ec4732b12 g_main_loop_run (libglib-2.0.so.0)
>                                                  #3 
> 0x00007f0eb822b316 n/a (libgio-2.0.so.0)
>                                                  #4 
> 0x00007f0ec475a0d5 n/a (libglib-2.0.so.0)
>                                                  #5 
> 0x00007f0ec51ac454 start_thread (libpthread.so.0)
>                                                  #6 
> 0x00007f0ec4eef7df __clone (libc.so.6)
>                                                 
>                                                  Stack trace of thread
> 1195:
>                                                  #0 
> 0x00007f0ec4ee648d poll (libc.so.6)
>                                                  #1 
> 0x00007f0ec4732786 n/a (libglib-2.0.so.0)
>                                                  #2 
> 0x00007f0ec473289c g_main_context_iteration (libglib-2.0.so.0)
>                                                  #3 
> 0x00007f0eaf6804bd n/a (libdconfsettings.so)
>                                                  #4 
> 0x00007f0ec475a0d5 n/a (libglib-2.0.so.0)
>                                                  #5 
> 0x00007f0ec51ac454 start_thread (libpthread.so.0)
>                                                  #6 
> 0x00007f0ec4eef7df __clone (libc.so.6)
>                                                 
>                                                  Stack trace of thread
> 1194:
>                                                  #0 
> 0x00007f0ec4ee648d poll (libc.so.6)
>                                                  #1 
> 0x00007f0ec120c8e0 n/a (libxcb.so.1)
>                                                  #2 
> 0x00007f0ec120e679 xcb_wait_for_event (libxcb.so.1)
>                                                  #3 
> 0x00007f0ebbd5c449 n/a (libQt5XcbQpa.so.5)
>                                                  #4 
> 0x00007f0ec5d11d78 n/a (libQt5Core.so.5)
>                                                  #5 
> 0x00007f0ec51ac454 start_thread (libpthread.so.0)
>                                                  #6 
> 0x00007f0ec4eef7df __clone (libc.so.6)
>                                                 
>                                                  Stack trace of thread
> 1198:
>                                                  #0 
> 0x00007f0ec4ee648d poll (libc.so.6)
>                                                  #1 
> 0x00007f0ec4732786 n/a (libglib-2.0.so.0)
>                                                  #2 
> 0x00007f0ec473289c g_main_context_iteration (libglib-2.0.so.0)
>                                                  #3 
> 0x00007f0ec5f4071f
> _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE
> (libQt5Core.so.5)
>                                                  #4 
> 0x00007f0ec5eea24a
> _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5)
>                                                  #5 
> 0x00007f0ec5d0d0f3 _ZN7QThread4execEv (libQt5Core.so.5)
>                                                  #6 
> 0x00007f0eb9b9de55 n/a (libQt5DBus.so.5)
>                                                  #7 
> 0x00007f0ec5d11d78 n/a (libQt5Core.so.5)
>                                                  #8 
> 0x00007f0ec51ac454 start_thread (libpthread.so.0)
>                                                  #9 
> 0x00007f0ec4eef7df __clone (libc.so.6)
>
>
> On Fri, Mar 25, 2016 at 8:52 PM, LyX Ticket Tracker <t...@lyx.org
> <mailto:t...@lyx.org>> wrote:
>
>     #10042: LyX crashes in conjunction with find-and-replace
>     ---------------------+-------------------------
>      Reporter:  ajd      |       Owner:  lasgouttes
>          Type:  defect   |      Status:  new
>      Priority:  normal   |   Milestone:
>     Component:  general  |     Version:  2.1.4
>      Severity:  normal   |  Resolution:
>      Keywords:           |
>     ---------------------+-------------------------
>
>     Comment (by skostysh):
>
>      Or if you don't run GDB, if you are interested in testing 2.2beta2
>      compiled in development mode, I think that the backtrace is
>     written to the
>      terminal automatically. It is the case for me, but I'm not sure which
>      settings it depends on.
>
>     --
>     Ticket URL: <http://www.lyx.org/trac/ticket/10042#comment:3
>     <http://www.lyx.org/trac/ticket/10042#comment:3>>
>     The LyX Project <http://www.lyx.org/>
>     LyX -- The Document Processor
>
>

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