\key\default crashes midi output

[Saul Tobin]

\version "2.24.0"

\score {
  \new Staff {
    \key f \major
    c'1
    \key \default
    c'1
  }
  \midi {}
}

This crashes with "In procedure cdar: Wrong type (expecting pair): ()" as
far back as 2.14.2.