Inkscape throws warning when exporting to pdf a svg image

[J. Navarro]

As far as I can tell the svg was succesfully exported as a pdf, yet an error message is thrown multiple (dozens of) times. The error is:

** (inkscape:6042): WARNING **: Called helperfns_read_number with value==null_ptr, this can lead to unexpected behaviour.

and also

** (inkscape:6426): WARNING **: Called helperfns_read_number with value==null_ptr, this can lead to unexpected behaviour.

the application was called as:
inkscape --file=image.svg --export-pdf=image.pdf

I think embedded fonts is the problem, 6042 happened with embedded fonts and jpeg image. 6426 happened with embedded fonts but no image.

The SVG was created by Adobe Illustrator

[su_v (suv-lp)]

a) SVG fonts
reproduced with Inkscape 0.47 r22583 on OS X 10.5.8
not reproduced with Inkscape 0.47+devel r9586

Exporting 'test.svg' as is with default settings to PDF, Inkscape 0.47 repeats the warning 2543 times:
** (inkscape-bin:53506): WARNING **: Called helperfns_read_number with value==null_ptr, this can lead to unexpected behaviour.

Not sure whether actually having the font 'MyriadPro-Regular' installed would make a difference. Inkscape currently does not render SVG fonts on-canvas yet (only allows to edit/create them).

b) embedded jpeg
Not tested with an embedded jpeg image - do you have another SVG test file for it?

[su_v (suv-lp)]

SVG fonts related warnings possibly fixed in revision 9259
<http://bazaar.launchpad.net/~inkscape.dev/inkscape/trunk/revision/9259>

[J. Navarro (jamilnavarro)]

I don't have a readily available svg file with embedded fonts and an embedded jpg that I can publish here. However tiny changes in the file such as deleting a text node or moving it or resizing stuff seem to alter the error number thrown (but not the text/hint): I just got:
** (inkscape:8979): WARNING **: Called helperfns_read_number with value==null_ptr, this can lead to unexpected behaviour.

[su_v (suv-lp)]

> deleting a text node or moving it or resizing
> stuff seem to alter the error number thrown

That's the process number (PID), not an error number, and will be different every time you launch a new Inkscape process. The warning message is the same (and AFAICT already fixed in current bzr trunk and prerelease versions).

@JazzyNico - can you test Linux or Windows export with a current bzr build?

[jazzynico (jazzynico)]

I confirm the warnings show with 0.47, but not with 0.48.
Closing this report as fixed in the upcoming version.
Regards.