W3C SVG logo is broken
All the following Logos are broken in nanosvg.
Seem like clipping/masking issue ?
https://www.w3.org/Icons/SVG/svg-w3c-v.svg https://www.w3.org/Icons/SVG/svg-logo-v.svg https://www.w3.org/Icons/SVG/svg-logo-h.svg
... any thoughts ?
Failed images and Safari images attached...

It's the use of the <text> tags ... which is unsupported by nanosvg
Also uses <defs> </defs> and reference to the definitions <use xlink:href="#svgstar"/> <use xlink:href="#base" opacity="0.85"/> <use xlink:href="#SVG"/> .. which break
Also see https://github.com/memononen/nanosvg/issues/129.
Additionally, as @Frenzie stated, "http://github.com/memononen/nanosvg/issues/203" is relevant.