print warning if halt -f -p doesn't work

diff --git a/build b/build
index ad8f3be..bbdfad0 100755 (executable)
--- a/build
+++ b/build
@@ -254,6 +254,7 @@ cleanup_and_exit () {
                test -e /proc/sysrq-trigger && echo o > /proc/sysrq-trigger
            fi
            halt -f -p
+           echo "wtf? I'm still alive. File a bug as I wanted to die!"
        fi
     else
        umount -n $BUILD_ROOT/proc/sys/fs/binfmt_misc 2> /dev/null || true