Comment 7 for bug 1548953

Reproduces on OS X with Inkscape 0.91+devel depending on the font used for the text [1]. AFAICT the version of boost does not matter (crash is reproducible with recent local builds using Boost 1.49 as well as with builds using Boost 1.59).
On the local system, the crash (depending on font) only reproduces in current Inkscape trunk after the major 2geom update in rev 14226 (archived builds: rev <= 14224 ok, rev >= 14228 crashes). Full backtrace of X11-based debug build attached.

[1] System fonts (from OS X 10.7.5) which trigger the crash are for example 'Arial' and 'Times New Roman' (each contains a glyph definition for 'THIN SPACE' \u2009), but not 'Arial Unicode' (also contains glyph definition). System font 'Verdana' and e.g. user font 'Turnpike' OTOH also trigger the crash but - according to fontforge - do not contain a definition for 'THIN SPACE' -> possible the fallback retrieved via pango/fontconfig may play an additional role.