bug in translate? 2.4.1

[Paul Scott]

In 2.4.1 this:

{ e^\markup{ \translate #cons( -1 0.1 ) { "Chrom." } } }

produces this:

address@hidden:~/music/test$ lilypond-snapshot translate.ly
GNU LilyPond 2.4.1
Processing `translate.ly'
Parsing...
Interpreting music... [1]
Preprocessing graphical objects...
Calculating line breaks... [2]
Backtrace:
In unknown file:
   ?:  7* [#<procedure #f ()>]
In /usr/share/lilypond-snapshot/2.4.1/scm/lily.scm:
 600:  8* [ly:parse-file "translate.ly"]
In /usr/share/lilypond-snapshot/2.4.1/ly/init.ly:
   7:  9* (if (pair? toplevel-scores) (ly:parser-print-book parser #))
   8: 10  [ly:parser-print-book #<my_lily_parser  > #<Book>]
In unknown file:
   ?: 11* [System_start_delimiter::after_line_breaking #<Grob 
SystemStartBar >]
   ?: 12* [Align_interface::alignment_callback #<Grob VerticalAxisGroup 
> 1]
   ?: 13* [Axis_group_interface::group_extent_callback #<Grob 
VerticalAxisGroup > 1]
   ?: 14* [Side_position_interface::aligned_side #<Grob TextScript > 1]
   ?: 15* [Grob::stencil_extent #<Grob TextScript > 1]
   ?: 16* [Text_interface::print #<Grob TextScript >]
   ?: 17* [line-markup #< Output_def> ((# # # ...) (# # # ...) (# # #)) 
...]
In /usr/share/lilypond-snapshot/2.4.1/scm/define-markup-commands.scm:
 127: 18* [stack-stencil-line 0.6 ...
 129: 19* [map #<procedure #f (m)> (# # # #)]
In /usr/share/guile/1.6/srfi/srfi-1.scm:
 637: 20  (if (null? rest) (map1 f list1) ...)
    ...
 624: 21  (let ((ret (list #))) (letrec ((lp #)) (lp (cdr ls) ret)))
 624: 22* [list ...
 624: 23* [#<procedure #f #> #]
In /usr/share/lilypond-snapshot/2.4.1/scm/define-markup-commands.scm:
 129: 24  [Text_interface::interpret_markup #< Output_def> (# # #) ...]
In unknown file:
   ?: 25* [translate-markup #< Output_def> ((# # # ...) (# # # ...) (# 
# #)) ...]
In /usr/share/lilypond-snapshot/2.4.1/scm/define-markup-commands.scm:
 535: 26* [ly:stencil-translate #<Stencil  > #<primitive-procedure cons>]

/usr/share/lilypond-snapshot/2.4.1/scm/define-markup-commands.scm:535:3: 
In procedure ly_translate_stencil in expression (ly:stencil-translate 
(interpret-markup layout props ...) offset):
/usr/share/lilypond-snapshot/2.4.1/scm/define-markup-commands.scm:535:3: 
Wrong type argument in position 2 (expecting number pair): 
#<primitive-procedure cons>


Should it or am I reading the manual wrong?

Thanks,

Paul Scott