Comment 2 for bug 578969

crash reproduced with Inkscape 0.47+devel r9405 on OS X 10.5.8

no relevant console messages, backtrace in attached crash report

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Some notes to your file without knowing yet what really causes the crash: is there a special reason to use the 'Spiro' path effect for all the straight lines? Same question for the 'Pattern along Path' effect: you can easily draw dashed lines by setting the stroke attributes in the 'Fill and Stroke...' dialog instead of using 'Pattern along Path' path effect.
</possibly off-topic>