hello, can someone explain why (with zsh 5.1.1):

efe() cat $1
efe <(seq 1 10) | wc -l
cat: /proc/self/fd/13: No such file or directory
0

gives error, instead these all works fine:
efe =(seq 1 10)| wc -l
cat <(seq 1 10)| wc -l

thanks
-- 
Pier Paolo Grassi