I managed to completely take down my entire linux system (not just a terminal) while doing some combination of the wic (cp,ls,rm) actions. Tried and failed to replicate it, even when running the above in a script loop. after the crash, it said: bash: /big/src/myBugs/poky/scripts/wic: /usr/bin/env: bad interpreter: Input/output error Mostly here in case i, or others, experience this in the future.
Note seen for at least two years. Closing.