segfault with wrong argument for dash-definition

[Thomas Morley]

Hi,

the following segfaults with any tested lily-version.
{ \override Slur #'dash-definition = #'(0 1.0 0.5 0.5) c( c) }
No other error-message than:
segmentation fault (core dumped)

Wheras
{ \override Slur #'dash-definition = #"foo" c( c) }
returns a meaningful message, a warning not even an error:
warning: type check for `dash-definition' failed; value `"foo"' must
be of type `pair'

Obviously '(0 1.0 0.5 0.5) full-fills the pair?-typechecking for this property.

Not sure how to improve this.

One could define something at the lines of
(define (list-list? x)
  (and (list? x)
       (every list? x)))
for the type-checking of dash-definition.

Or can a better warning/error be emitted during processing?

Thoughts?


Cheers,
  Harm