"shell-expand-line" wrongly(?) expanded $'foo' to $foo

[Clark Wang]

See the following example (tested with bash 5.0.7):


# bind -q shell-expand-line
shell-expand-line can be invoked via "\e\C-e".

# echo $PWD      # press ESC C-e
# echo /root

# echo $( pwd )  # press ESC C-e
# echo /root

# echo $'foo'    # press ESC C-e
# echo $foo


Is this a bug?

-clark