Version:           3.1.2 (using KDE KDE 3.3.91)
Installed from:    Compiled From Sources
Compiler:          GCC 3.4.3 
OS:                Linux

While typing, KDevelop suddenly froze and began to use all RAM, fairly slowly though. I got the bt from gdb, sorry there are no line numbers, it is my distro's package.

#0  0xa6ce938c in memcpy () from /lib/tls/libc.so.6
#1  0x49a80f4c in QString::setLength () from /opt/qt/lib/libqt-mt.so.3
#2  0x49a81390 in QString::grow () from /opt/qt/lib/libqt-mt.so.3
#3  0x49a82e15 in QString::operator+= () from /opt/qt/lib/libqt-mt.so.3
#4  0xa5b3a8d6 in Lexer::readArgument () from /opt/kde/lib/libkdevcppparser.so.0
#5  0xa5b32cf4 in Lexer::nextToken () from /opt/kde/lib/libkdevcppparser.so.0
#6  0xa5b3b3be in Lexer::tokenize () from /opt/kde/lib/libkdevcppparser.so.0
#7  0xa5b3b5f5 in Lexer::setSource () from /opt/kde/lib/libkdevcppparser.so.0
#8  0xa5bf2b77 in CppCodeCompletion::completeText () from /opt/kde/lib/kde3/libkdevcppsupport.so
#9  0xa5bf4dbb in CppCodeCompletion::slotTimeout () from /opt/kde/lib/kde3/libkdevcppsupport.so
#10 0xa5bf5026 in CppCodeCompletion::qt_invoke () from /opt/kde/lib/kde3/libkdevcppsupport.so
#11 0x49796ed4 in QObject::activate_signal () from /opt/qt/lib/libqt-mt.so.3
#12 0x4979766c in QObject::activate_signal () from /opt/qt/lib/libqt-mt.so.3
#13 0x49af0719 in QTimer::timeout () from /opt/qt/lib/libqt-mt.so.3
#14 0x497b92df in QTimer::event () from /opt/qt/lib/libqt-mt.so.3
#15 0x4973315f in QApplication::internalNotify () from /opt/qt/lib/libqt-mt.so.3
#16 0x497332fc in QApplication::notify () from /opt/qt/lib/libqt-mt.so.3
#17 0xa714e436 in KApplication::notify () from /opt/kde-cvs/lib/libkdecore.so.4
#18 0x4972670c in QEventLoop::activateTimers () from /opt/qt/lib/libqt-mt.so.3
#19 0x496df6c1 in QEventLoop::processEvents () from /opt/qt/lib/libqt-mt.so.3
#20 0x49749851 in QEventLoop::enterLoop () from /opt/qt/lib/libqt-mt.so.3
#21 0x497497a6 in QEventLoop::exec () from /opt/qt/lib/libqt-mt.so.3
#22 0x497322bf in QApplication::exec () from /opt/qt/lib/libqt-mt.so.3
#23 0x080a35a7 in QValueListPrivate<QString>::at ()
#24 0xa6c9519d in __libc_start_main () from /lib/tls/libc.so.6
#25 0x08072251 in ?? ()