A segmentation fault in cortex_m_endreset_event() is sometimes raised with very broken target like Kinetis Kx with erased flash and active WDOG. Debugging revealed that cortex_m->dwt_num_comp is 4 and dwt_list is NULL at cortex_m:290 Change-Id: I229c59d6da13d816df513d1dbb19968e4b5951e2 Signed-off-by: Tomas Vanek <vanekt@fbl.cz> Reviewed-on: http://openocd.zylin.com/2989 Reviewed-by: Thomas Schmid <thomas@rfranging.com> Tested-by: jenkins Reviewed-by: Paul Fertser <fercerpav@gmail.com>