Re: strange key handling on a terminal

[Richard Stallman]

    You could lobby to change define-key so it accepts this syntax for the
    third argument as well.  I think it'd make sense.  IIRC the third argument
    can only ever contain things like functions and key sequences, so a vector
    whose first element is a list should currently always lead to an error.
    See sample patch below.

You can install it; it seems harmless.