Hi Neil,
These are unsafe, since they return SCM_UNSPECIFIED instead of a Real
if the paper variables aren't defined; using robust_scm2double () here
will ensure a default is returned.
You can see the consequences of variable lookup failure by running
bookparts.ly
(http://git.savannah.gnu.org/gitweb/?p=lilypond.git;a=blob;f=input/regression/bookparts.ly;h=a814fb5e072911540ecf2ab44a7b7b09dae61835;hb=HEAD).
This snippet also fails to get a sane value for paper-height in
layout->page-init.
hmm... somehow I'm completely stuck at this moment. Why does the
affected output-def contain no paper-width / paper-height etc.? I don't
really know how this can be triggered by my patch since it clones the
output-def and modifies only the margin and line-width parts.
Any idea?
Regards,
Michael
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