So, I'm not a C++ developer. At all. But I got annoyed that the latest ubuntu "upgrade" broke KRename. It just segfaults. So, I'm stumbling around. Got a backtrace: Program received signal SIGSEGV, Segmentation fault. QBasicAtomicInt::ref (this=0x0) at /usr/include/qt4/QtCore/qatomic_x86_64.h:121 121 : "memory"); (gdb) backtrace #0 QBasicAtomicInt::ref (this=0x0) at /usr/include/qt4/QtCore/qatomic_x86_64.h:121 #1 0x0000000000463c43 in __static_initialization_and_destruction_0 (__priority=65535, __initialize_p=1) at /home/Desktop/krename-4.0.7/src/plugin.cpp:22 #2 0x000000000048087d in __libc_csu_init () #3 0x00007ffff488c2a0 in __libc_start_main (main=0x41bcd0 <main(int, char**)>, argc=1, ubp_av=0x7fffffffe108, init=0x480820 <__libc_csu_init>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffffffe0f8) at libc-start.c:185 #4 0x000000000041e491 in _start () The line of code at plugin.cpp:22 is: const QString Plugin::S_TOKEN_SEPARATOR = TokenHelpDialog::S_TOKEN_SEPARATOR; TokenHelpDialog::S_TOKEN_SEPARATOR is defined as: const QString TokenHelpDialog::S_TOKEN_SEPARATOR = ";;"; in tokenHelpDialog.cpp If I modify the line where the segfault occurs to : const QString Plugin::S_TOKEN_SEPARATOR = ";;"; And compile it, it runs with out a segfault. What obvious thing am I missing about how C++ works? Thanks, Dan