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[Bug pascal/20028] New: On pascal application closing error with stack overrun
- From: "abtaylr at comcast dot net" <sourceware-bugzilla at sourceware dot org>
- To: gdb-prs at sourceware dot org
- Date: Sun, 01 May 2016 18:06:13 +0000
- Subject: [Bug pascal/20028] New: On pascal application closing error with stack overrun
- Auto-submitted: auto-generated
https://sourceware.org/bugzilla/show_bug.cgi?id=20028
Bug ID: 20028
Summary: On pascal application closing error with stack overrun
Product: gdb
Version: 7.11
Status: NEW
Severity: normal
Priority: P2
Component: pascal
Assignee: unassigned at sourceware dot org
Reporter: abtaylr at comcast dot net
Target Milestone: ---
Created attachment 9227
--> https://sourceware.org/bugzilla/attachment.cgi?id=9227&action=edit
contains 2 gdb output dumps and 1 trace from Lazarus-ide
In attempting to find and fix the errors occurring while an application is
attempting to correct, I am consistently getting:
=thread-selected,id="3"
~"\nThread "
~"1 \"subrip\" received signal SIGSEGV, Segmentation fault.\n"
&"/build/gdb-sqtpXm/gdb-7.11/gdb/gdbtypes.c:2036: internal-error:
resolve_dynamic_struct: Assertion `TYPE_NFIELDS (type) > 0' failed.\nA problem
internal to GDB has been detected,\nfurther debugging may prove unreliable.\n"
&"\nThis is a bug, please report it."
&" For instructions, see:\n<http://www.gnu.org/software/gdb/bugs/>."
I have include 2 files showing the debug output generated while tracing the
execution of the program. The point where the error occurs is in the following
procedure:
procedure TFormStartMain.FormClose(Sender : TObject;
var CloseAction : TCloseAction);
begin
//stop sequence if active
StopSequence:=true;
//Stop Vob Scanning if active
if VobProcess.Working and not VobProcess.Paused then
BitBtnPauseContinueClick(Sender);
try
if (not CLI.Enabled)
and (not AutoText.Enabled)
and (not FindMatrix.Enabled)
and (not JoinMatrix.Enabled)
and (not MatrixInfo.Enabled)
and (not SortMatrix.Enabled) then
// [after /SORTMATRIX, this should not be reached because of ExitProcess(),
//but still...]
begin
FConfig.SaveConfigGeneral;
FConfig.SaveBMPProfile(SysToUTF8(AppzDir + IniConfigFileName));
//Save last used BMP settings
end;
PreviewCFG.AutoZoom := False; //avoid crash when AutoZoom checked
(FormResize call)
FormErrors.Free;
CharMatrix.Free;
AspectRatio.Free;
AutoProc.Free;
NulColorArray.Free;
OcrIt.Free;
Glyph.Free;
SubtitleFormat.Free;
TimingOperations.Free;
VobProcess.Free;
SubRipHelp.Free;
RecognizedBmp.Free;
except
raise Exception.Create('FormStartMain FormClose Error');
end;
end; <====================== error occurs ===============
While stepping forward once I hit the breakpoint on this line no.763. I
typically go forward until I get to:
Procedure TStringList.Changed;
begin
If (FUpdateCount=0) Then
begin
If Assigned(FOnChange) then <============== execution stops here! ===
FOnchange(Self);
FPONotifyObservers(Self,ooChange,Nil);
end;
end;
One of these files shows doing an F9 run from the program block 'end' statement
while the other shows F7 stepping forward until failure.
I also include a file showing a run of lazarus-ide under gdb exiting after the
run occurs, included for interest.
If there is anything else I can get you, please let me know.
abt
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