Field access on empty record leads to "Unclosed delimiter"

[blueberrycarrot]

Field access on empty record leads to "Unclosed delimiter"

[blueberrycarrot]

This too doesn't look consistent:

~: [{}].b?
╭───┬──╮
│ 0 │  │
╰───┴──╯
~: [].b?
╭────────────╮
│ empty list │
╰────────────╯
~: [0].b?
Error: nu::shell::column_not_found

  × Cannot find column
   ╭─[entry #8:1:1]
 1 │ [0].b?
   ·  ┬  ┬
   ·  │  ╰── cannot find column 'b'
   ·  ╰── value originates here
   ╰────

[{}] is technically a table, therefore .b? on it should produce a null.

[] is not a table, but "an empty list" is a weird response to "give me the value of a column or null if the column is not found" (that's what ? is supposed to do as I understand).

[0] is 100% not a table or a record, and this is the first time Nu clearly states that a column was not found, but then ? is supposed to suppress "column not found" errors, it's the direct responsibility of the operator, again, to my understanding.