"Scope index out of range" error is confusing

[nriley]

I was trying to replace CAPITALIZE_FIRST_WORD with capitalize_all_words and said:

bring second through fourth word blue trap to red cap

I got:

 > user.cursorless_multiple_target_command(cursorless_move_bring_action, cursorless_move_bring_targets)
Exception: Scope index out of range

And had to ask on Slack for help. From what I understand Cursorless was trying to do something like:

bring second through fourth word blue trap to second through fourth word red cap

And as there was no fourth word in CAPITALIZE_FIRST_WORD, I got "Scope index out of range".

Things I would have loved to have understood about the error, ideally using the words that I used when specifying it.

• Which scope? (e.g., "word")
• Which index? (e.g., "4" or "fourth")
• Where was the scope being used (e.g, "in the target of a bring/move")

The last I can tell a bit from the stack trace but this would require me to have the Talon log visible.

And even better:

• What was implied or assumed in my command that triggered this error? (e.g., that the scope qualifiers used for the source of the move should also apply to the target)
• What could I do to tell Cursorless that I did not want it to assume this? (e.g., use "token" before "red cap".