Segmentation fault in nativeparser.cpp

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christobal:
This happens on line 1257, if the Code completion is configured to use one parser per project and the number of loaded projects exceeds the "Maximum allowed parsers" configuration.

This is how I encountered it:
- Configured CC to use one parser per project
- Set the number of max. allowed parsers to 2
- Loaded 2 projects to workspace -> OK
- Loaded 3rd project causes segmentation fault

I use Code::Blocks on Win7 (64-Bit) Rev. 8836; built with wxWidgets 2.8
With Code::Blocks 12.11 the behaviour is the same

oBFusCATed:
Do you have a backtrace?

christobal:

--- Quote from: oBFusCATed on February 12, 2013, 09:10:57 am ---Do you have a backtrace?

--- End quote ---

C::B didn't create a crash.log, but I have the call stack from the debugger

--- Code: ---#0 65EC347F NativeParser::RemoveObsoleteParsers(this=0x56c5a60) (D:\codeblocks\source\src\plugins\codecompletion\nativeparser.cpp:1257)
#1 65EBE8A8 NativeParser::CreateParser(this=0x56c5a60, project=0xecb8f60) (D:\codeblocks\source\src\plugins\codecompletion\nativeparser.cpp:590)
#2 65EAB40C CodeCompletion::OnProjectActivated(this=0x56c5a18, event=...) (D:\codeblocks\source\src\plugins\codecompletion\codecompletion.cpp:2384)
#3 65F28428 cbEventFunctor<CodeCompletion, CodeBlocksEvent>::Call(this=0x5cb5028, event=...) (D:/codeblocks/source/src/include/cbfunctor.h:35)
#4 6189A918 Manager::ProcessEvent(this=0xd9a588, event=...) (D:\codeblocks\source\src\sdk\manager.cpp:179)
#5 618B07B6 PluginManager::NotifyPlugins(this=0x2eef4f8, event=...) (D:\codeblocks\source\src\sdk\pluginmanager.cpp:1445)
#6 618D06E9 ProjectManager::SetProject(this=0xdcb368, project=0xecb8f60, refresh=true) (D:\codeblocks\source\src\sdk\projectmanager.cpp:494)
#7 618D3ADF ProjectManager::LoadProject(this=0xdcb368, filename=..., activateIt=true) (D:\codeblocks\source\src\sdk\projectmanager.cpp:792)
#8 0044A064 MainFrame::DoOpenProject(this=0xdbca38, filename=..., addToHistory=true) (D:\codeblocks\source\src\src\main.cpp:1831)
#9 00449B2F MainFrame::OpenGeneric(this=0xdbca38, filename=..., addToHistory=true) (D:\codeblocks\source\src\src\main.cpp:1780)
#10 004524AF MainFrame::OnFileReopenProject(this=0xdbca38, event=...) (D:\codeblocks\source\src\src\main.cpp:2771)
#11 705C7670 wxEvtHandler::ProcessEventIfMatches(wxEventTableEntryBase const&, wxEvtHandler*, wxEvent&) () (D:\codeblocks\source\src\devel\wxmsw28u_gcc_cb.dll:??)
#12 705C77A9 wxEventHashTable::HandleEvent(wxEvent&, wxEvtHandler*) () (D:\codeblocks\source\src\devel\wxmsw28u_gcc_cb.dll:??)
#13 705C7B74 wxEvtHandler::ProcessEvent(wxEvent&) () (D:\codeblocks\source\src\devel\wxmsw28u_gcc_cb.dll:??)
#14 705C7B10 wxEvtHandler::ProcessEvent(wxEvent&) () (D:\codeblocks\source\src\devel\wxmsw28u_gcc_cb.dll:??)
#15 705C7B10 wxEvtHandler::ProcessEvent(wxEvent&) () (D:\codeblocks\source\src\devel\wxmsw28u_gcc_cb.dll:??)
#16 705C7B10 wxEvtHandler::ProcessEvent(wxEvent&) () (D:\codeblocks\source\src\devel\wxmsw28u_gcc_cb.dll:??)
#17 705C7B10 wxEvtHandler::ProcessEvent(wxEvent&) () (D:\codeblocks\source\src\devel\wxmsw28u_gcc_cb.dll:??)
#18 705C7B10 wxEvtHandler::ProcessEvent(wxEvent&) () (D:\codeblocks\source\src\devel\wxmsw28u_gcc_cb.dll:??)
#19 705C7B10 wxEvtHandler::ProcessEvent(wxEvent&) () (D:\codeblocks\source\src\devel\wxmsw28u_gcc_cb.dll:??)
#20 705C7B10 wxEvtHandler::ProcessEvent(wxEvent&) () (D:\codeblocks\source\src\devel\wxmsw28u_gcc_cb.dll:??)
#21 705C7B10 wxEvtHandler::ProcessEvent(wxEvent&) () (D:\codeblocks\source\src\devel\wxmsw28u_gcc_cb.dll:??)
#22 705C7B10 wxEvtHandler::ProcessEvent(wxEvent&) () (D:\codeblocks\source\src\devel\wxmsw28u_gcc_cb.dll:??)
#23 705C7B10 wxEvtHandler::ProcessEvent(wxEvent&) () (D:\codeblocks\source\src\devel\wxmsw28u_gcc_cb.dll:??)
#24 705C7B10 wxEvtHandler::ProcessEvent(wxEvent&) () (D:\codeblocks\source\src\devel\wxmsw28u_gcc_cb.dll:??)
#25 705C7B10 wxEvtHandler::ProcessEvent(wxEvent&) () (D:\codeblocks\source\src\devel\wxmsw28u_gcc_cb.dll:??)
#26 705C7B10 wxEvtHandler::ProcessEvent(wxEvent&) () (D:\codeblocks\source\src\devel\wxmsw28u_gcc_cb.dll:??)
#27 705C7B10 wxEvtHandler::ProcessEvent(wxEvent&) () (D:\codeblocks\source\src\devel\wxmsw28u_gcc_cb.dll:??)
#28 705C7B10 wxEvtHandler::ProcessEvent(wxEvent&) () (D:\codeblocks\source\src\devel\wxmsw28u_gcc_cb.dll:??)
#29 705C7B10 wxEvtHandler::ProcessEvent(wxEvent&) () (D:\codeblocks\source\src\devel\wxmsw28u_gcc_cb.dll:??)

--- End code ---

BTW: The same happens if you have loaded a couple of projects and then reduce the number of max. parsers to a number less than currently opened projects.

ollydbg:
Ok, Thanks.
Same crash here.
crash code:

--- Code: ---void NativeParser::RemoveObsoleteParsers()
{
TRACE(_T("NativeParser::RemoveObsoleteParsers()"));

ConfigManager* cfg = Manager::Get()->GetConfigManager(_T("code_completion"));
const size_t maxParsers = cfg->ReadInt(_T("/max_parsers"), 5);
wxArrayString removedProjectNames;
std::pair<cbProject*, ParserBase*> info = GetParserInfoByCurrentEditor();

while (m_ParserList.size() > maxParsers)
{
bool deleted = false;
for (ParserList::const_iterator it = m_ParserList.begin(); it != m_ParserList.end(); ++it)
{
if (it->second == info.second)
continue;

if (DeleteParser(it->first))
{
wxString prj = (it->first ? it->first->GetTitle() : _T("*NONE*"));
removedProjectNames.Add(prj);
deleted = true;
break;
}
}

--- End code ---

line: wxString prj = (it->first ? it->first->GetTitle() : _T("*NONE*"));
the debug log is:

--- Quote ---> p it

[debug]> p it
[debug]$1 = {first = , second = }
[debug]>>>>>>cb_gdb:

$1 = {first = , second = }
> p it->first

[debug]> p it->first
[debug]$2 = (cbProject *) 0xfeeefeee
[debug]>>>>>>cb_gdb:

$2 = (cbProject *) 0xfeeefeee
> p it->first->GetTitle()

[debug]> p it->first->GetTitle()
[debug]Cannot access memory at address 0xfeeefeee
[debug]>>>>>>cb_gdb:

Cannot access memory at address 0xfeeefeee

--- End quote ---

No time to analyze the bug. :)
It would better to file a bug report in BerliOS site, so it never be forgot.

BTW: which version of gdb did you use, it looks your gdb have longer backtrace them mine.

jarod42:
I assume that DeleteParser modify m_ParserList, so the iterator 'it' is no longer valid.

Moving

--- Code: ---wxString prj = (it->first ? it->first->GetTitle() : _T("*NONE*"));
--- End code ---
just before

--- Code: ---if (DeleteParser(it->first))
--- End code ---
should fix the issue.

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