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List:       kdevelop-bugs
Subject:    [Bug 136436] New: KDevelop 3.4 svn - crash in
From:       Tom Bech <tom.bech () broadpark ! no>
Date:       2006-10-28 20:53:37
Message-ID: 20061028225335.136436.tom.bech () broadpark ! no
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http://bugs.kde.org/show_bug.cgi?id=136436         
           Summary: KDevelop 3.4 svn - crash in
                    QMake::AssignmentAST::writeBack when editing project
                    settings
           Product: kdevelop
           Version: unspecified
          Platform: SuSE RPMs
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: crash
          Priority: NOR
         Component: general
        AssignedTo: kdevelop-bugs kdevelop org
        ReportedBy: tom.bech broadpark no


Version:           3.4 (using KDE KDE 3.5.4)
Installed from:    SuSE RPMs
Compiler:          gcc 4.1.0 
OS:                Linux

Using KDevelop 3.4 fresh from SVN as of 28.10.2006 on a KDE 3.5.4 on a Suse 10.1 box. \
I'm writing a small Qt4 application to, well, get to know qt4 :)

I'm experiencing a lot of crashes involving QMake::AssignmentAST::writeBack() when \
using the qmake manager. I made the project using the new project wizard for a basic \
qt4 application with a gui.

The crash is sometimes when adding files or creating new files, but it's easiest to \
reproduce by for example trying to edit project settings (e.g. right clicking on \
"src" and selecing "settings") - this will result in the following traceback when \
accepting the changes (for instance setting debug mode on tab 2):

[KCrash handler]
#6  0xb6a5f7d7 in QString::operator+= () from /usr/lib/qt3/lib/libqt-mt.so.3
#7  0xb5425674 in QMake::AssignmentAST::writeBack ()
   from /opt/kde3/lib/libkdevqmakeparser.so.0
#8  0xb5424906 in QMake::AST::writeBack ()
   from /opt/kde3/lib/libkdevqmakeparser.so.0
#9  0xb5424d8c in QMake::ProjectAST::writeBack ()
   from /opt/kde3/lib/libkdevqmakeparser.so.0
#10 0xb5267d2a in Scope::saveToFile ()
   from /opt/kde3/lib/kde3/libkdevtrollproject.so
#11 0xb522a607 in ProjectConfigurationDlg::apply ()
   from /opt/kde3/lib/kde3/libkdevtrollproject.so
#12 0xb522a815 in ProjectConfigurationDlg::accept ()
   from /opt/kde3/lib/kde3/libkdevtrollproject.so
#13 0xb6aeb152 in QDialog::qt_invoke () from /usr/lib/qt3/lib/libqt-mt.so.3
#14 0xb52141d3 in ProjectConfigurationDlgBase::qt_invoke ()
   from /opt/kde3/lib/kde3/libkdevtrollproject.so
[snip]

I've had a quick look at the function found in \
buildtools/lib/parsers/qmake/qmakeast.cpp but couldn't immediate spot any obvious \
wrong code.

The crash results in losing the whole project file every time (it's apparently \
overwritten). Perhaps it would be a better idea to write back to a temp file and \
replace the project file if the writeback operation is successful?

Thanks for your great work on KDevelop, by the way :)


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