related to

• https://discord.com/channels/601130461678272522/615329862395101194/1183349907952779365

Describe the bug

as per title

How to reproduce

1. run

let code = {|x?| print ($x | default "i'm the default")}
do $code

2. see the following error

Error: nu::shell::variable_not_found

  × Variable not found
   ╭─[entry #7:1:1]
 1 │ let code = {|x?| print ($x | default "i'm the default")}
   ·                         ─┬
   ·                          ╰── variable not found
 2 │ do $code
   ╰────

3. run

def foo [x?] { print ($x | default "i'm the default") }
foo

4. see the expected output, i.e. i'm the default

Expected behavior

because closures and commands are so similar, i.e. closures are basically unnamed commands, i expected running

let code = {|x?| print ($x | default "i'm the default")}
do $code

to show

i'm the default

Screenshots

No response

Configuration

Additional context

No response