With * =x11-misc/xdiskusage-1.48_p20100606 * =x11-libs/fltk-2.0_pre6970-r1 -xft It _may_ be a bug from fltk according to the backtrace. With fltk +xft, xdiskusage works fine. Reproducible: Always # xdiskusage . (gdb) bt #0 0x00007ffff7151b86 in ?? () from /lib64/libc.so.6 #1 0x00007ffff7b57200 in fltk::setfont (font=0x7ffff7dc7900, psize=<value optimized out>) at x11/Font_xlfd.cxx:541 #2 0x00007ffff7b803bf in fltk::Slider::draw (this=0x63f680) at Slider.cxx:367 #3 0x00007ffff7b59309 in fltk::Group::draw_child (this=<value optimized out>, w=...) at Group.cxx:755 #4 0x00007ffff7b59479 in fltk::Group::draw (this=0x60f910) at Group.cxx:687 #5 0x00007ffff7b7690b in fltk::Window::flush (this=0x60f910) at x11/run.cxx:2589 #6 0x00007ffff7b778cb in fl_window_flush (window=0x60f910) at run.cxx:657 #7 0x00007ffff7b77981 in fltk::flush () at run.cxx:691 #8 0x00007ffff7b7aa76 in fltk::wait (time_to_wait=0.100000001) at run.cxx:486 #9 0x0000000000405ee3 in OutputWindow::make(char const*, Disk*) () #10 0x0000000000406a15 in main () (gdb) frame 1 #1 0x00007ffff7b57200 in fltk::setfont (font=0x7ffff7dc7900, psize=<value optimized out>) at x11/Font_xlfd.cxx:541 (gdb) print *font $8 = {name_ = 0x7ffff7ba3dd9 "helvetica", attributes_ = 0} (gdb) print *t $4 = {f = {name_ = 0x7ffff7ba3dd9 "helvetica", attributes_ = 0}, system_name = 0x7ffff7ba3f58 "-*-helvetica-medium-r-normal--*", bold = 0x7ffff7dc7940, italic = 0x7ffff7dc7980, first = 0x62e250, xlist = 0x0, n = 0}
This version is obsolete and still using fltk2. The new version, xdiskusage-1.48_p20111016, is using the recommended fltk 1.3 version. So closing as OBSOLETE. Please reopen with logs if you can reproduce similar error with the new version, or file a new bug.