parser: incorrect parsing of pipe token close to variable

[i4ki]

ls|grep a #works
echo "hello"|grep h #works
echo hello|grep h #works
echo $PATH|grep # <stdin line 12>:1:10: Unrecognized character in action: U+007C '|'
echo $a|b # <stdin line 13>:1:7: Unrecognized character in action: U+007C '|'