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Author Topic: C::B crashes after Debug - Next Line  (Read 16357 times)

Offline benezan

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C::B crashes after Debug - Next Line
« on: December 31, 2013, 03:25:46 pm »
I have a strange problem with Code::Blocks when debugging. I have used the debugger (GDB) successfully many times until now. Most of the timne it worked flawlessly. Now, when I'm trying to step through the code line by line with "Next line (F7) I get the folowing error messages:
Code
Starting debugger: C:\Programme\MinGW\bin\gdb.exe -nx -fullname  -quiet  -args E:/Projekte/BeamiconII/Source/Beamicon2/bin/Debug/Beamicon2.exe
done
Registered new type: wxString
Registered new type: STL String
Registered new type: STL Vector
Setting breakpoints
Debugger name and version: GNU gdb (GDB) 7.5
Child process PID: 3128
At E:\Projekte\BeamiconII\Source\Beamicon2\src\gcodeparser.cpp:275
Error accessing memory address 0x7816cd30: Input/output error.
Error accessing memory address 0x785947d8: Input/output error.
I've set a breakpoint at line #275 then hit F7 once. The strange thing is that if I place the cursor in the next line and use "run to cursor" it works. After a second "Next line" my program freezes and I can't do anything with the debugger anymore. When I try "stop debugger" I get this message
Code
At E:\Projekte\BeamiconII\Source\Beamicon2\src\gcodeparser.cpp:275
Continuing...
At E:\Projekte\BeamiconII\Source\Beamicon2\src\gcodeparser.cpp:282
Error accessing memory address 0x7816cd30: Input/output error.
Error accessing memory address 0x785947d8: Input/output error.
Trying to pause the running process...
Trying to pause the running process...
but nothing happens. C::B still reacts to mouse clicks but I can't stop the debugger, so all I can do is closing it alltogether with the window close button. Then the windows message "Code::Blocks has a problem..." pops up but even after that it's not gone. I have to kill the process with the task manager, otherwise I can not start it again.

My first thought was that the problem is related to some bug in my own code but I think if it was a dangling pointer or currupted memory problem I should get a segmentation fault and a controlled termination. And why does it work when using "run to cursor"? ??? I'm also aware that this might be a compiler/gdb problem and no C::B problem, but I have no way of finding out other than to ask here if somebody else has had the same problem before.

Some more things I found out:
* The problem does not show up all the time but when it does it's deterministic. I tried out other projects, with some of them "next line" still works. Even inside different cpp files of the same project, sometimes it works sometimes it doesn't. But when it's there it's persistent.
* The same code compiled with the same MinGW version and the same C::B settings (we copied the .cbp file and only replaced the path names) works perfectly with the debugger on my friend's PC.
* My program runs without problems when started without debugger or with debugger but without breakpoints.
* I use C::B V12.11 and MinGw 2012-04-26.

Any hints what to look for greatly appreciated...
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Offline Jenna

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Re: C::B crashes after Debug - Next Line
« Reply #1 on: December 31, 2013, 03:39:01 pm »
This might be related:
http://forums.codeblocks.org/index.php/topic,14847.msg99440.html#msg99440
but your problem seems to be in a cpp not in a header file.

Nevertheless, did you try to do a full rebuild (clean and build) and did you look for probably existing older precompiled headers (usually *.gch).
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Offline ollydbg

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Re: C::B crashes after Debug - Next Line
« Reply #2 on: December 31, 2013, 04:22:18 pm »
Quote from: benezan on December 31, 2013, 03:25:46 pm

* I use C::B V12.11 and MinGw 2012-04-26.

Any hints what to look for greatly appreciated...
What is "MinGW 2012-04-26" ?

Also, can you give us a simple project? I have some different version of GCC, and I build GDB GIT HEAD from time to time, so I would like to test/reproduce this issue.

Thanks.
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If some piece of memory should be reused, turn them to variables (or const variables).
If some piece of operations should be reused, turn them to functions.
If they happened together, then turn them to classes.

Offline benezan

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Re: C::B crashes after Debug - Next Line
« Reply #3 on: December 31, 2013, 04:45:05 pm »
Hmm, Yes I actually have two header files without cpps. One is a header for a DLL, the other defines a pure virtual class. I don't see how this could cause any trouble but I can try to remove them.

And yes, I tried a full rebuild, it didn't help. I can try to delete the precompiled headers manually.

I'm also doing a complete re-install on a different PC with newer versions (C::B 13.12 and MinGw 4.7.1) to see if this helps. It takes a while though because I have to recompile all the libraries.

Ollydbg,
I've found no version info other than the build date. The download ("mingw-get-inst-20120426.exe") is no longer available on sourceforge... Unfortunatelly, my project is very big and has lots of dependencies. It doesn't happen with small projects. I'm going to try out the newer MinGw/C::B versions first. If it doesn't help I'll try to strip down my project to the smalles possible that reproduces the problem.

Thanks
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Offline benezan

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Re: C::B crashes after Debug - Next Line
« Reply #4 on: December 31, 2013, 05:48:09 pm »
Update: deleting the pch file manually didn't help.
Adding cpp files to the implementaion-less headers didn't help.
New installation is still compiling...

See you next year  ;)
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Offline oBFusCATed

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Re: C::B crashes after Debug - Next Line
« Reply #5 on: January 01, 2014, 03:23:40 pm »
Please enable full (in the debugger's settings) and post it.
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Offline ollydbg

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Re: C::B crashes after Debug - Next Line
« Reply #6 on: January 01, 2014, 03:28:10 pm »
I see such kind of issue one or two years ago when debugging C::B, but I don't see them right now, I believe it is a bug in GDB or GCC, but they are already fixed. ;)
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Offline benezan

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Re: C::B crashes after Debug - Next Line
« Reply #7 on: January 03, 2014, 11:00:03 am »
I also have the impression that somehow my installation of Mingw is broken. But I feel a bit overwhelmed fixing it. I tried to install the latest version of C::B. Here it's said that codeblocks-13.12mingw-setup.exe is recommended and that it comes with a stable, precompiled version (4.7.1) of MinGw.

When I install that my program doesn't run at all. I get an error message "_gxx_personality_v0 could not be located in the dynamic link library libstdc++-6.dll". I googled and found some answers but, no , I don't have a 64 bit system, my compiler executables are set correctly (g++, not gcc) and I assume that the version of the dll should fit the compiler if it comes in the same archive. The computer was blank (no other version of C::B and no other compiler was ever installed on it) and I even searched the hard disk for different versions of libstdc++-6.dll, none found.

I gave up and completely deleted the Mingw installation. I re-installed from my archive "mingw-get-inst-20120426.exe" I saved last year. Surprisingly when I enter "gcc -v" the new installation displays 4.6.2 where on my other computer it says 4.7.2 (GDB 7.4 as opposed to 7.5). I suspect this has something to do with that's not a real archive but a "get-inst" that downloads from the internet... but anyway - now it works, I mean it compiles and runs with C::B V13.12. But I still get the same debugger error "input/output error...". :(

So I think Ollydbg is right, it's not a C::B bug but a GDB/GCC problem. So please excuse my ignorance, I know this question has surely been asked many times before: "Where do I get a stable version of MinGw and how do I install it so that it works?" :-\

The precompiled bundle "codeblocks-13.12mingw-setup.exe" doesn't seem to work. I don't want the latest "experimental" version (TDM 4.8.1) but the stable one, if possible. Can I expect the "_gxx_personality_v0" issue to be fixed if I build it on my own insead of using the precompiled one? Thank you very much for your patience.
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Offline benezan

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Re: C::B crashes after Debug - Next Line
« Reply #8 on: January 03, 2014, 11:07:15 am »
The full debug log is here:
Code
Building to ensure sources are up-to-date
Selecting target: 
Debug
Adding source dir: E:\Projekte\BeamiconII\Source\Beamicon2\
Adding source dir: E:\Projekte\BeamiconII\Source\Beamicon2\
Adding file: E:\Projekte\BeamiconII\Source\Beamicon2\bin\Debug\Beamicon2.exe
Changing directory to: E:/Projekte/BeamiconII/Source/Beamicon2/.
Set variable: PATH=.;C:\Programme\wxWidgets-2.9.4\lib\gcc_dll;C:\Programme\MinGW\bin;C:\Programme\MinGW;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\system32\wbem;c:\Programme\AlteraQuartus\quartus\bin;C:\Programme\MinGW\GnuWin32\bin

[debug]Command-line: C:\Programme\MinGW\bin\gdb.exe -nx -fullname  -quiet  -args E:/Projekte/BeamiconII/Source/Beamicon2/bin/Debug/Beamicon2.exe
[debug]Working dir : E:\Projekte\BeamiconII\Source\Beamicon2

Starting debugger: C:\Programme\MinGW\bin\gdb.exe -nx -fullname  -quiet  -args E:/Projekte/BeamiconII/Source/Beamicon2/bin/Debug/Beamicon2.exe
done

[debug]> set prompt >>>>>>cb_gdb:

Registered new type: wxString
Registered new type: STL String
Registered new type: STL Vector
Setting breakpoints

[debug]Reading symbols from E:\Projekte\BeamiconII\Source\Beamicon2\bin\Debug\Beamicon2.exe...
[debug]done.
[debug](gdb) 
[debug]>>>>>>cb_gdb:
[debug]> show version
[debug]GNU gdb (GDB) 7.5
[debug]Copyright (C) 2012 Free Software Foundation, Inc.
[debug]License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
[debug]This is free software: you are free to change and redistribute it.
[debug]There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
[debug]and "show warranty" for details.
[debug]This GDB was configured as "i686-pc-mingw32".
[debug]For bug reporting instructions, please see:
[debug]<http://www.gnu.org/software/gdb/bugs/>.
[debug]>>>>>>cb_gdb:
[debug]> set confirm off

Debugger name and version: GNU gdb (GDB) 7.5

[debug]>>>>>>cb_gdb:
[debug]> set width 0
[debug]>>>>>>cb_gdb:
[debug]> set height 0
[debug]>>>>>>cb_gdb:
[debug]> set breakpoint pending on
[debug]>>>>>>cb_gdb:
[debug]> set print asm-demangle on
[debug]>>>>>>cb_gdb:
[debug]> set unwindonsignal on
[debug]>>>>>>cb_gdb:
[debug]> set print elements 0
[debug]>>>>>>cb_gdb:
[debug]> set disassembly-flavor att
[debug]>>>>>>cb_gdb:
[debug]> source C:\Programme\CodeBlocks\share\codeblocks/scripts/stl-views-1.0.3.gdb
[debug]>>>>>>cb_gdb:
[debug]> directory E:/Projekte/BeamiconII/Source/Beamicon2/
[debug]Source directories searched: E:/Projekte/BeamiconII/Source/Beamicon2;$cdir;$cwd
[debug]>>>>>>cb_gdb:
[debug]> break "E:/Projekte/BeamiconII/Source/Beamicon2/src/gcodeparser.cpp:275"
[debug]Breakpoint 1 at 0x456ac4: file E:\Projekte\BeamiconII\Source\Beamicon2\src\gcodeparser.cpp, line 275.
[debug]>>>>>>cb_gdb:
[debug]> run
[debug]Starting program: E:\Projekte\BeamiconII\Source\Beamicon2\bin\Debug\Beamicon2.exe 

Child process PID: 2796

[debug][New Thread 2796.0xb34]
[debug][New Thread 2796.0xbcc]
[debug][New Thread 2796.0xbd0]
[debug][New Thread 2796.0xc00]
[debug][New Thread 2796.0xbfc]
[debug][New Thread 2796.0x8a4]
[debug][New Thread 2796.0x9e0]
[debug][New Thread 2796.0xbc0]
[debug][New Thread 2796.0xb98]
[debug][New Thread 2796.0x8b0]
[debug][New Thread 2796.0x560]
[debug][New Thread 2796.0xe34]
[debug][New Thread 2796.0x8e0]
[debug][New Thread 2796.0x6bc]
[debug][New Thread 2796.0xe48]
[debug][New Thread 2796.0xe50]
[debug]Breakpoint 1, GCodeParser::ReadWord (this=0xad72850, code=@0x22f64b: 0 '\000', index=@0x22f638: -1, num=@0x22f63c: 8.9857092511642948e-316) at E:\Projekte\BeamiconII\Source\Beamicon2\src\gcodeparser.cpp:275
[debug]E:\Projekte\BeamiconII\Source\Beamicon2\src\gcodeparser.cpp:275:8661:beg:0x456ac4
[debug]>>>>>>cb_gdb:

At E:\Projekte\BeamiconII\Source\Beamicon2\src\gcodeparser.cpp:275

[debug]> bt 30
[debug]#0  GCodeParser::ReadWord (this=0xad72850, code=@0x22f64b: 0 '\000', index=@0x22f638: -1, num=@0x22f63c: 8.9857092511642948e-316) at E:\Projekte\BeamiconII\Source\Beamicon2\src\gcodeparser.cpp:275
[debug]#1  0x00457baa in GCodeParser::ParseLine (this=0xad72850) at E:\Projekte\BeamiconII\Source\Beamicon2\src\gcodeparser.cpp:492
[debug]#2  0x00459470 in GCodeParser::ExecuteProgram (this=0xad72850, label=0x4c89cf "%") at E:\Projekte\BeamiconII\Source\Beamicon2\src\gcodeparser.cpp:1117
[debug]#3  0x0040eb46 in Beamicon2Frame::OnMenuFileOpen (this=0xad72430, event=...) at E:\Projekte\BeamiconII\Source\Beamicon2\Beamicon2Main.cpp:847
[debug]#4  0x01403414 in wxAppConsoleBase::HandleEvent (this=0xad1c7a0, handler=0xad72430, func=(void (wxEvtHandler::*)(wxEvtHandler * const, wxEvent &)) 0x40e958 <Beamicon2Frame::OnMenuFileOpen(wxCommandEvent&)>, event=...) at ../../src/common/appbase.cpp:591
[debug]#5  0x01403470 in wxAppConsoleBase::CallEventHandler (this=0xad1c7a0, handler=0xad72430, functor=..., event=...) at ../../src/common/appbase.cpp:603
[debug]#6  0x014bba2d in wxEvtHandler::ProcessEventIfMatchesId (entry=..., handler=0xad72430, event=...) at ../../src/common/event.cpp:1333
[debug]#7  0x014bc3b2 in wxEvtHandler::SearchDynamicEventTable (this=0xad72430, event=...) at ../../src/common/event.cpp:1675
[debug]#8  0x014bbe0a in wxEvtHandler::TryHereOnly (this=0xad72430, event=...) at ../../src/common/event.cpp:1520
[debug]#9  0x01a2a488 in wxEvtHandler::TryBeforeAndHere (this=0xad72430, event=...) at ../../include/wx/event.h:3339
[debug]#10 0x014bbcb1 in wxEvtHandler::ProcessEventLocally (this=0xad72430, event=...) at ../../src/common/event.cpp:1457
[debug]#11 0x014bbc59 in wxEvtHandler::ProcessEvent (this=0xad72430, event=...) at ../../src/common/event.cpp:1430
[debug]#12 0x014bbe77 in wxEvtHandler::SafelyProcessEvent (this=0xad72430, event=...) at ../../src/common/event.cpp:1537
[debug]#13 0x016309d4 in wxWindowBase::HandleWindowEvent (this=0xad72430, event=...) at ../../src/common/wincmn.cpp:1496
[debug]#14 0x015fae82 in wxMenuBase::SendEvent (this=0xad628c0, itemid=447, checked=-1) at ../../src/common/menucmn.cpp:658
[debug]#15 0x015c38d7 in wxFrameBase::ProcessCommand (this=0xad72430, item=0xad82480) at ../../src/common/framecmn.cpp:280
[debug]#16 0x01545133 in wxFrame::HandleCommand (this=0xad72430, id=447, cmd=0, control=0x0) at ../../src/msw/frame.cpp:819
[debug]#17 0x0154553c in wxFrame::MSWWindowProc (this=0xad72430, message=273, wParam=447, lParam=0) at ../../src/msw/frame.cpp:921
[debug]#18 0x0151e706 in wxWndProc (hWnd=0x605a6, message=273, wParam=447, lParam=0) at ../../src/msw/window.cpp:2711
[debug]#19 0x7e368734 in USER32!GetDC () from C:\WINDOWS\system32\user32.dll
[debug]#20 0x000605a6 in ?? ()
[debug]#21 0x00000111 in ?? ()
[debug]#22 0x000001bf in ?? ()
[debug]#23 0x00000000 in ?? ()
[debug]>>>>>>cb_gdb:
[debug]> next
[debug]Warning:
[debug]Cannot insert breakpoint -144.
[debug]Error accessing memory address 0x7816cd30: Input/output error.
[debug]Cannot insert breakpoint -143.
[debug]Error accessing memory address 0x785947d8: Input/output error.
[debug]0x00456ac7 in GCodeParser::ReadWord (this=0xad72850, code=@0x22f64b: 0 '\000', index=@0x22f638: -1, num=@0x22f63c: 8.9857092511642948e-316) at E:\Projekte\BeamiconII\Source\Beamicon2\src\gcodeparser.cpp:275
[debug]E:\Projekte\BeamiconII\Source\Beamicon2\src\gcodeparser.cpp:275:8661:beg:0x456ac7
[debug]>>>>>>cb_gdb:

Error accessing memory address 0x7816cd30: Input/output error.
Error accessing memory address 0x785947d8: Input/output error.
At E:\Projekte\BeamiconII\Source\Beamicon2\src\gcodeparser.cpp:275

[debug]> bt 30
[debug]#0  0x00456ac7 in GCodeParser::ReadWord (this=0xad72850, code=@0x22f64b: 0 '\000', index=@0x22f638: -1, num=@0x22f63c: 8.9857092511642948e-316) at E:\Projekte\BeamiconII\Source\Beamicon2\src\gcodeparser.cpp:275
[debug]#1  0x00457baa in GCodeParser::ParseLine (this=0xad72850) at E:\Projekte\BeamiconII\Source\Beamicon2\src\gcodeparser.cpp:492
[debug]#2  0x00459470 in GCodeParser::ExecuteProgram (this=0xad72850, label=0x4c89cf "%") at E:\Projekte\BeamiconII\Source\Beamicon2\src\gcodeparser.cpp:1117
[debug]#3  0x0040eb46 in Beamicon2Frame::OnMenuFileOpen (this=0xad72430, event=...) at E:\Projekte\BeamiconII\Source\Beamicon2\Beamicon2Main.cpp:847
[debug]#4  0x01403414 in wxAppConsoleBase::HandleEvent (this=0xad1c7a0, handler=0xad72430, func=(void (wxEvtHandler::*)(wxEvtHandler * const, wxEvent &)) 0x40e958 <Beamicon2Frame::OnMenuFileOpen(wxCommandEvent&)>, event=...) at ../../src/common/appbase.cpp:591
[debug]#5  0x01403470 in wxAppConsoleBase::CallEventHandler (this=0xad1c7a0, handler=0xad72430, functor=..., event=...) at ../../src/common/appbase.cpp:603
[debug]#6  0x014bba2d in wxEvtHandler::ProcessEventIfMatchesId (entry=..., handler=0xad72430, event=...) at ../../src/common/event.cpp:1333
[debug]#7  0x014bc3b2 in wxEvtHandler::SearchDynamicEventTable (this=0xad72430, event=...) at ../../src/common/event.cpp:1675
[debug]#8  0x014bbe0a in wxEvtHandler::TryHereOnly (this=0xad72430, event=...) at ../../src/common/event.cpp:1520
[debug]#9  0x01a2a488 in wxEvtHandler::TryBeforeAndHere (this=0xad72430, event=...) at ../../include/wx/event.h:3339
[debug]#10 0x014bbcb1 in wxEvtHandler::ProcessEventLocally (this=0xad72430, event=...) at ../../src/common/event.cpp:1457
[debug]#11 0x014bbc59 in wxEvtHandler::ProcessEvent (this=0xad72430, event=...) at ../../src/common/event.cpp:1430
[debug]#12 0x014bbe77 in wxEvtHandler::SafelyProcessEvent (this=0xad72430, event=...) at ../../src/common/event.cpp:1537
[debug]#13 0x016309d4 in wxWindowBase::HandleWindowEvent (this=0xad72430, event=...) at ../../src/common/wincmn.cpp:1496
[debug]#14 0x015fae82 in wxMenuBase::SendEvent (this=0xad628c0, itemid=447, checked=-1) at ../../src/common/menucmn.cpp:658
[debug]#15 0x015c38d7 in wxFrameBase::ProcessCommand (this=0xad72430, item=0xad82480) at ../../src/common/framecmn.cpp:280
[debug]#16 0x01545133 in wxFrame::HandleCommand (this=0xad72430, id=447, cmd=0, control=0x0) at ../../src/msw/frame.cpp:819
[debug]#17 0x0154553c in wxFrame::MSWWindowProc (this=0xad72430, message=273, wParam=447, lParam=0) at ../../src/msw/frame.cpp:921
[debug]#18 0x0151e706 in wxWndProc (hWnd=0x605a6, message=273, wParam=447, lParam=0) at ../../src/msw/window.cpp:2711
[debug]#19 0x7e368734 in USER32!GetDC () from C:\WINDOWS\system32\user32.dll
[debug]#20 0x000605a6 in ?? ()
[debug]#21 0x00000111 in ?? ()
[debug]#22 0x000001bf in ?? ()
[debug]#23 0x00000000 in ?? ()
[debug]>>>>>>cb_gdb:
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Offline MortenMacFly

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Re: C::B crashes after Debug - Next Line
« Reply #9 on: January 03, 2014, 01:25:10 pm »
Check you PATH environment variable and compiler settings in C::B. It looks like you have multiple instances of different compiler versions installed that conflict (which is normal in the case of multiple version in the PATH).

If unsure, search for gcc*.* across your whole PC.
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Compiler logging: Settings->Compiler & Debugger->tab "Other"->Compiler logging="Full command line"
C::B Manual: https://www.codeblocks.org/docs/main_codeblocks_en.html
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Offline benezan

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Re: C::B crashes after Debug - Next Line
« Reply #10 on: January 03, 2014, 04:14:45 pm »
Now, I have deleted everything, once again, and re-installed with TDM-GCC-32 V4.8.1. I re-built every library from clean state and now it seems to work. I can step through the code line by line with the debugger, again. :)
I still have to check if everything else works. I've got a few more warnings than usual from the compiler.
But at least it's definitely not a problem of Code::Blocks.

Thanks for your help, I hope I don't need any more of it.
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Offline benezan

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Re: C::B crashes after Debug - Next Line
« Reply #11 on: January 04, 2014, 12:22:42 pm »
Grrr, spoke too soon. The problem is still there. :( It just moved to different parts of the source. It seems that with the new compiler the adress ranges where the code is located is mixed up a bit. "Next line" works now at the breakpoints I used to set before but I get input/output errors again when I step through the code at different locations.

I double checked for duplicate installations of gcc*.exe and gdb*.exe. There was a path "C:\Programme\AlteraQuartus\quartus\bin" with gcc in the environment variable PATH. I renamed bin to bin-test before the last re-build (a complete re-build of wxWidgest and all other dlls I use).

Could it be that a strange bug in my code overwrites some adresses on the stack? But why does it work with "run to cursor"? When I use this with the cursor on the next line it should set the exact same breakpoint and execute the exact same code accessing the exact same memory. ???

A friend also suggested it could be a memory problem with my PC. But I get the same messages with the same adresses reported on two different PCs with different processors and different DRAM brand. The only common thing is that Windows was installed from the same CD.
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Offline oBFusCATed

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Re: C::B crashes after Debug - Next Line
« Reply #12 on: January 04, 2014, 12:36:32 pm »
If it is exactly the same error after multiple runs and recompiles then it is not cause by a bad memory.

Have you tried if this same thing happens if you use gdb on the command line?
If it does it will be best to contact the support channels (mailing list or irc channels) for mingw or gdb, they can give you better hints about what is going on.
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