[Lazarus] Application crash when scrolling DB Grid

[Landmesser John]

no probs in this situation with DBGrid and Oracle Database by ZQuery on 
Windows XP

Try to use dbnavigator -> Button-last ?!


Am 20.03.2018 um 10:44 schrieb Petr Hložek via Lazarus:
> Hi,
>
> my application uses DB grid and when user hit and hold pgdown/pgup, or
> hit CTRL+Home/End, applicaiton always crashes. Gdb gets this
> information:
>
> 0x000000000091bd68 in
> BUFDATASET$_$TDOUBLELINKEDBUFINDEX_$__$$_COMPAREBOOKMARKS$PBUFBOOKMARK$PBUFBOOKMARK$$LONGINT
> ()
> (gdb) bt
> #0  0x000000000091bd68 in
> BUFDATASET$_$TDOUBLELINKEDBUFINDEX_$__$$_COMPAREBOOKMARKS$PBUFBOOKMARK$PBUFBOOKMARK$$LONGINT
> ()
> #1  0x000000000092053c in
> BUFDATASET$_$TCUSTOMBUFDATASET_$__$$_COMPAREBOOKMARKS$TBYTES$TBYTES$$LONGINT
> ()
> #2  0x0000000003736588 in  ()
> #3  0x0000000003410718 in  ()
> #4  0x00007fffffffc9d8 in  ()
> #5  0x00007fffffffcb20 in  ()
> #6  0x0000000000000001 in  ()
> #7  0x0000000001a9ac98 in  ()
> #8  0x00007fffffffca50 in  ()
> #9  0x000000000000000f in  ()
> #10 0x000000000106f1b0 in .Ld263 ()
> #11 0x0000000001ad6778 in  ()
> #12 0x000000000066cef0 in WSREGISTERCLASS (self=0x7fffffffca90) at
> include/customcontrol.inc:99
> #13 0x00000000008ad882 in FIND (this=0x1add2d8, ITEM=0x3736588,
> AINDEX=0) at dbgrids.pas:4619
> #14 0x00000000008adb65 in INDEXOF (this=0x1add2d8, ITEM=0x3736588) at
> dbgrids.pas:4627
> #15 0x00000000008ace9d in GETCURRENTROWSELECTED (this=0x1add2d8) at
> dbgrids.pas:4388
> #16 0x00000000008a8a8a in DRAWROW (this=0x1ad6778, AROW=1) at dbgrids.pas:3084
> #17 0x0000000000845cc0 in DRAWALLROWS (this=0x1ad6778) at grids.pas:4174
> #18 0x00000000008a88d3 in DRAWALLROWS (this=0x1ad6778) at dbgrids.pas:3054
> #19 0x0000000000844465 in PAINT (this=0x1ad6778) at grids.pas:3742
> #20 0x000000000066d006 in PAINTWINDOW (this=0x1ad6778, DC=26725384) at
> include/customcontrol.inc:132
> #21 0x0000000000653c88 in PAINTHANDLER (this=0x1ad6778,
> THEMESSAGE=...) at include/wincontrol.inc:4819
> #22 0x00000000006581c9 in WMPAINT (this=0x1ad6778, MSG=...) at
> include/wincontrol.inc:6772
> #23 0x000000000066cf3c in WMPAINT (this=0x1ad6778, MESSAGE=...) at
> include/customcontrol.inc:112
> #24 0x0000000000431def in SYSTEM$_$TOBJECT_$__$$_DISPATCH$formal ()
> #25 0x000000000106f1a8 in .Ld263 ()
> #26 0x000000000106e8c0 in VMT_$CONTROLS_$$_TCUSTOMCONTROL ()
> #27 0x0000000000000001 in  ()
> #28 0x000000000000000f in  ()
> #29 0x00007fffffffd278 in  ()
> #30 0x0000000001ad6778 in  ()
> #31 0x00007ffff6c8fb10 in  () at /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
> #32 0x00000000031d4660 in  ()
> #33 0x00007fffffffd550 in  ()
> #34 0x00007fffffffd4f0 in  ()
> #35 0x0000000000738500 in
> GTK2PROC_$$_GTKEXPOSEEVENT$PGTKWIDGET$PGDKEVENTEXPOSE$POINTER$$BOOLEAN32
> ()
> #36 0x0000000000662a17 in WNDPROC (this=0x1ad6778, THEMESSAGE=...) at
> include/control.inc:2234
> #37 0x000000000065525d in WNDPROC (this=0x1ad6778, MESSAGE=...) at
> include/wincontrol.inc:5396
> #38 0x000000000084779a in WNDPROC (this=0x1ad6778, THEMESSAGE=...) at
> grids.pas:4701
> #39 0x00000000008a3a7d in WNDPROC (this=0x1ad6778, THEMESSAGE=...) at
> dbgrids.pas:1444
> #40 0x0000000000828792 in DELIVERMESSAGE (TARGET=0x1ad6778,
> AMESSAGE=0) at lclmessageglue.pas:112
> ---Type <return> to continue, or q <return> to quit---q
> Quit
> (gdb) bt
> #0  0x000000000091bd68 in
> BUFDATASET$_$TDOUBLELINKEDBUFINDEX_$__$$_COMPAREBOOKMARKS$PBUFBOOKMARK$PBUFBOOKMARK$$LONGINT
> ()
> #1  0x000000000092053c in
> BUFDATASET$_$TCUSTOMBUFDATASET_$__$$_COMPAREBOOKMARKS$TBYTES$TBYTES$$LONGINT
> ()
> #2  0x0000000003736588 in  ()
> #3  0x0000000003410718 in  ()
> #4  0x00007fffffffc9d8 in  ()
> #5  0x00007fffffffcb20 in  ()
> #6  0x0000000000000001 in  ()
> #7  0x0000000001a9ac98 in  ()
> #8  0x00007fffffffca50 in  ()
> #9  0x000000000000000f in  ()
> #10 0x000000000106f1b0 in .Ld263 ()
> #11 0x0000000001ad6778 in  ()
> #12 0x000000000066cef0 in WSREGISTERCLASS (self=0x7fffffffca90) at
> include/customcontrol.inc:99
> #13 0x00000000008ad882 in FIND (this=0x1add2d8, ITEM=0x3736588,
> AINDEX=0) at dbgrids.pas:4619
> #14 0x00000000008adb65 in INDEXOF (this=0x1add2d8, ITEM=0x3736588) at
> dbgrids.pas:4627
> #15 0x00000000008ace9d in GETCURRENTROWSELECTED (this=0x1add2d8) at
> dbgrids.pas:4388
> #16 0x00000000008a8a8a in DRAWROW (this=0x1ad6778, AROW=1) at dbgrids.pas:3084
> #17 0x0000000000845cc0 in DRAWALLROWS (this=0x1ad6778) at grids.pas:4174
> #18 0x00000000008a88d3 in DRAWALLROWS (this=0x1ad6778) at dbgrids.pas:3054
> #19 0x0000000000844465 in PAINT (this=0x1ad6778) at grids.pas:3742
> #20 0x000000000066d006 in PAINTWINDOW (this=0x1ad6778, DC=26725384) at
> include/customcontrol.inc:132
> #21 0x0000000000653c88 in PAINTHANDLER (this=0x1ad6778,
> THEMESSAGE=...) at include/wincontrol.inc:4819
> #22 0x00000000006581c9 in WMPAINT (this=0x1ad6778, MSG=...) at
> include/wincontrol.inc:6772
> #23 0x000000000066cf3c in WMPAINT (this=0x1ad6778, MESSAGE=...) at
> include/customcontrol.inc:112
> #24 0x0000000000431def in SYSTEM$_$TOBJECT_$__$$_DISPATCH$formal ()
> #25 0x000000000106f1a8 in .Ld263 ()
> #26 0x000000000106e8c0 in VMT_$CONTROLS_$$_TCUSTOMCONTROL ()
> #27 0x0000000000000001 in  ()
> #28 0x000000000000000f in  ()
> #29 0x00007fffffffd278 in  ()
> #30 0x0000000001ad6778 in  ()
> #31 0x00007ffff6c8fb10 in  () at /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
> #32 0x00000000031d4660 in  ()
> #33 0x00007fffffffd550 in  ()
> #34 0x00007fffffffd4f0 in  ()
> #35 0x0000000000738500 in
> GTK2PROC_$$_GTKEXPOSEEVENT$PGTKWIDGET$PGDKEVENTEXPOSE$POINTER$$BOOLEAN32
> ()
> #36 0x0000000000662a17 in WNDPROC (this=0x1ad6778, THEMESSAGE=...) at
> include/control.inc:2234
> #37 0x000000000065525d in WNDPROC (this=0x1ad6778, MESSAGE=...) at
> include/wincontrol.inc:5396
> #38 0x000000000084779a in WNDPROC (this=0x1ad6778, THEMESSAGE=...) at
> grids.pas:4701
> #39 0x00000000008a3a7d in WNDPROC (this=0x1ad6778, THEMESSAGE=...) at
> dbgrids.pas:1444
> #40 0x0000000000828792 in DELIVERMESSAGE (TARGET=0x1ad6778,
> AMESSAGE=0) at lclmessageglue.pas:112
> ---Type <return> to continue, or q <return> to quit---bt
> #41 0x000000000072b665 in DELIVERMESSAGE (TARGET=0x1ad6778,
> AMESSAGE=0) at gtk2proc.inc:3702
> #42 0x0000000000736f92 in DODELIVERPAINTMESSAGE (TARGET=0x1ad6778,
> PAINTMSG=...) at gtk2callback.inc:27
> #43 0x000000000073706a in DELIVERPAINTMESSAGE (TARGET=0x1ad6778,
> THEMESSAGE=0) at gtk2callback.inc:45
> #44 0x0000000000737254 in DELIVERGTKPAINTMESSAGE (TARGET=0x1ad6778,
> WIDGET=0x31d4660, AREA=0x7fffffffd8c4, REPAINTALL=false,
> ISAFTERGTK=false) at gtk2callback.inc:103
> #45 0x0000000000738576 in GTKEXPOSEEVENT (WIDGET=0x31d4660,
> EVENT=0x7fffffffd8b0, DATA=0x1ad6778) at gtk2callback.inc:694
> #46 0x00007ffff6c8fb7b in  () at /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
> #47 0x00007ffff6919f9d in g_closure_invoke () at
> /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
> #48 0x00007ffff692ccde in  () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
> #49 0x00007ffff6934e4f in g_signal_emit_valist () at
> /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
> #50 0x00007ffff6935ecf in g_signal_emit () at
> /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
> #51 0x00007ffff6da5f9c in  () at /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
> #52 0x00007ffff6c8e958 in gtk_main_do_event () at
> /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
> #53 0x00007ffff773eb9f in  () at /usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0
> #54 0x00007ffff773eb45 in  () at /usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0
> #55 0x00007ffff773eb45 in  () at /usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0
> #56 0x00007ffff773eb45 in  () at /usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0
> #57 0x00007ffff773b623 in  () at /usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0
> #58 0x00007ffff773bfb0 in gdk_window_process_all_updates () at
> /usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0
> #59 0x00007ffff773bff9 in  () at /usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0
> #60 0x00007ffff771ac1c in  () at /usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0
> #61 0x00007ffff6640e25 in g_main_context_dispatch () at
> /lib/x86_64-linux-gnu/libglib-2.0.so.0
> #62 0x00007ffff66411f0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
> #63 0x00007ffff664127c in g_main_context_iteration () at
> /lib/x86_64-linux-gnu/libglib-2.0.so.0
> #64 0x00000000005f90e8 in APPPROCESSMESSAGES (this=0x1549918) at
> gtk2widgetset.inc:2338
> #65 0x000000000045b4bd in HANDLEMESSAGE (this=0x1547348) at
> include/application.inc:1276
> #66 0x000000000045ba3d in RUNLOOP (this=0x1547348) at
> include/application.inc:1413
> #67 0x0000000000717208 in APPRUN (this=0x1549918, ALOOP=...) at
> include/interfacebase.inc:54
> #68 0x000000000045b9e4 in RUN (this=0x1547348) at include/application.inc:1401
> #69 0x000000000041f715 in main () at cqrlog.lpr:81
> (gdb)
>
> Do you have any idea what could be wrong, please? Thanks!
>
> Lazarus 1.8.0, fpc 3.0.4 Ubuntu 16.04, Ubuntu 17.10, the same problem
> with Lazarus 1.6.x in Fedora/Ubuntu/Debian etc.
>
> Petr
>