Interesting bug:
Lazarus crashes when it is compiled with FPC2.4.4 and -O2, on Linux. Maybe it has happened for long, I have not built an optimized binary for a long time.
Happens with both GTK2 and QT bindings.

Juha

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TMainIDE.DoLoadLFM Creating designer for hidden component of /home/juha/SW/lazarus_gitsvn/ide/editorfilemanager.pas TMainIDE.DoOpenProjectFile select form in designer: EditorFileManagerForm:TEditorFileManagerForm TDesigner TApplication.HandleException Access violation
Stack trace:
$0000000000E2B414 line 443 of lazsynedittext.pas
$00000000007E5934 line 7658 of include/wincontrol.inc $00000000007F6AE7 line 5345 of include/control.inc $00000000007F6AD9 line 5343 of include/control.inc $00000000007F6AD9 line 5343 of include/control.inc $00000000007F6AD9 line 5343 of include/control.inc $00000000007F3460 line 4191 of include/control.inc $0000000000B629CA line 4989 of sourceeditor.pp
$0000000000B66464 line 5656 of sourceeditor.pp
$00000000006585E1 line 11183 of main.pp
$000000000062FEAA line 2231 of main.pp
$000000000062C12F line 1510 of main.pp
$00000000005BAD75 line 112 of lazarus.pp
***** TSourceEditor.Destroy: FInEditorChangedUpdating was true LAZARUS END - cleaning up ...

I don't see any widgetset related error here...lazsynedittext is last in chain, maybe Martin knows more about it.

zeljko
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line 443 is a begin statement?

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Ok, I made a proper backtrace. The line numbers are more correct, too. This is not a serious issue. It happens only with -O2 and FPC 2.4.4. 2.6.x is better in many ways.

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(gdb) bt
#0 TEXTTOVIEWINDEX (this=0x0, AINDEX=412) at lazsynedittext.pas:444 #1 0x0000000000d01c74 in TEXTTOVIEWINDEX (this=0x7fffe2088ae0, AINDEX=412) at syneditfoldedview.pp:786
#2 0x0000000000d3d664 in INVALIDATELINES (this=0x7fffe2088ae0, FIRSTTEXTLINE=412, LASTTEXTLINE=420) at syngutter.pp:145 #3 0x0000000000db4f41 in INVALIDATEGUTTERLINES (this=0x7fffe2088ae0, FIRSTTEXTLINE=412, LASTTEXTLINE=0) at lazsyntextarea.pp:229 #4 0x0000000000ce9822 in INVALIDATEGUTTERLINES (this=0x7fffe2088ae0, FIRSTLINE=413, LASTLINE=421) at synedit.pp:2550
#5 0x0000000000d0a143 in CALCULATEMAPS (this=0x19c) at syneditfoldedview.pp:3465
#6 0x0000000000d09dae in SETLINESINWINDOW (this=0x0, AVALUE=420) at syneditfoldedview.pp:3393
#7 0x0000000000cf919a in RECALCCHARSANDLINESINWIN (this=0x7fffe2088ae0, CHECKCARET=true (156)) at synedit.pp:7326 #8 0x0000000000cf8f98 in SIZEORFONTCHANGED (this=0x7fffe2088ae0, BFONT=true (164)) at synedit.pp:7278
#9 0x0000000000cf9f21 in CREATEWND (this=0x0) at synedit.pp:7588 #10 0x00000000007bfb43 in CREATEHANDLE (this=0x7fffe2088ae0) at include/wincontrol.inc:7220
#11 0x0000000000cee582 in CREATEHANDLE (this=0x7fffe7abfb90) at synedit.pp:4024 #12 0x00000000007c2a14 in HANDLENEEDED (this=0x7fffe2088ae0) at include/wincontrol.inc:7658
#13 0x00000000007b782b in CHECKHANDLEALLOCATED (AWINCONTROL=0x0, parentfp=0x7fffffffdb60) at include/wincontrol.inc:3424 #14 0x00000000007b7885 in CHECKHANDLEALLOCATED (AWINCONTROL=0x0, parentfp=0x7fffffffdb60) at include/wincontrol.inc:3431 #15 0x00000000007b7885 in CHECKHANDLEALLOCATED (AWINCONTROL=0x0, parentfp=0x7fffffffdb60) at include/wincontrol.inc:3431 #16 0x00000000007b7885 in CHECKHANDLEALLOCATED (AWINCONTROL=0x0, parentfp=0x7fffffffdb60) at include/wincontrol.inc:3431 #17 0x00000000007b7423 in DOALLAUTOSIZE (this=0x7fffe71ad270) at include/wincontrol.inc:3475
#18 0x00000000007d3bc7 in ENABLEAUTOSIZING (this=0x7fffe2088ae0) at include/control.inc:5345
#19 0x00000000007d3bb9 in ENABLEAUTOSIZING (this=0x7fffe2088ae0) at include/control.inc:5343
#20 0x00000000007d3bb9 in ENABLEAUTOSIZING (this=0x7fffe2088ae0) at include/control.inc:5343
#21 0x00000000007d3bb9 in ENABLEAUTOSIZING (this=0x7fffe2088ae0) at include/control.inc:5343
#22 0x00000000007d0540 in SETVISIBLE (this=0x7fffe7abfb90, VALUE=true) at include/control.inc:4191
#23 0x0000000000aea55a in SETVISIBLE (this=0x7fffe2088ae0, VALUE=true (164)) at sourceeditor.pp:4989
#24 0x0000000000af2da0 in NOTEBOOKPAGECHANGED (this=0x7fffe2088ae0, SENDER=0x19c) at sourceeditor.pp:7127
#25 0x00000000007f95f5 in DOCHANGE (this=0x19c) at include/customnotebook.inc:285
#26 0x00000000007f9f46 in SETPAGEINDEX (this=0x7fffe2088ae0, AVALUE=420) at include/customnotebook.inc:558
#27 0x0000000000aedfd6 in SETPAGEINDEX (this=0x7fffe2088ae0, AVALUE=412) at sourceeditor.pp:5654
#28 0x0000000000aef965 in DECUPDATELOCKINTERNAL (this=0x7fffe2088ae0) at sourceeditor.pp:6066
#29 0x0000000000af6ae3 in DECUPDATELOCK (this=0x7ffff7ec3a70) at sourceeditor.pp:8312
#30 0x000000000065a5f1 in DOOPENPROJECTFILE (this=0x7ffff7fa29e0, AFILENAME=0x7fffe22d9b50
'/home/juha/SW/lazarus_gitsvn/ide/lazarus.lpi', FLAGS=0) at main.pp:11183
#31 0x0000000000631eba in SETUPSTARTPROJECT (this=0x7ffff7fa29e0) at main.pp:2231
#32 0x000000000062e13f in STARTIDE (this=0x7fffe2088ae0) at main.pp:1510 #33 0x00000000005bcd85 in main () at lazarus.pp:112

2012/2/19, Martin :

I can't reproduce it.

Ok I do not have Linux and 2.4.4.

I tried
- Fedora (gtk) 2.5.1 -O2
- Win 2.4.4 -O2

But that looks like an FPC issue...

See below:
- If the constructor has an exception, then that woul run destroy automatically; but things would crash much earlier...

anyway. re-run in gdb, with "-break-insert FPC_RAISEEXCEPTION" (requires "gdb -i mi" / or use none gdbmi "break insert...)

-------------------
If it happens, with only ONE synedit being open

set breakpoints:
- on the line it is created
look at the asm, to see thu address / offset in the object
- set a watchpoint on the address containing the internal pointer to the object
- on the line in RecalcCharsAndLinesInWin (frame 7) where it is nil check the value and check if it comes from the same memory

FFoldedLinesView is unconditionally created in SynEdits Constructor (Which is the only place I found it being written)

    FFoldedLinesView := TSynEditFoldedView.Create(FTheLinesView, fCaret);

Only destroyed in Destroy

and frame 7 (below) calls frame 6 (above) like this

   FFoldedLinesView.LinesInWindow := LinesInWindow;

yet in Frame 6 "this = 0x0"