685650 - Inconsistent rendering of SVG data URIs that are invalid XML

Status: NEW

(Core :: SVG, defect)

Description

[Daniel Holbert [:dholbert]]

STR:
 1. Load this URI:
> data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg'><rect width="100" height="100"></rect>

 2. Reload ~20 times, and see if any of the reloads give different results.

ACTUAL BEHAVIOR:
 - 90% of the time, I get an XML parsing error
 - 10% of the time, I get a rendered black rect

EXPECTED RESULTS: Should _always_ get an XML parsing error.

Comment 1

[Daniel Holbert [:dholbert]]

Mozilla/5.0 (X11; Linux x86_64; rv:9.0a1) Gecko/20110908 Firefox/9.0a1

Comment 2

[Daniel Holbert [:dholbert]]

If I make the data URI longer, it's appears to increase the frequency of the non-error rendering.

e.g. this data URI renders closer to 50% error / 50% black-rect:
data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg'><rect width="100" height="100"></rect><!-- aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa -->

Comment 3

[Daniel Holbert [:dholbert]]

(sorry for making bugzilla hugely wide with that last comment)

So, I'm guessing this is a race condition between "display what we've parsed so far" vs. "parser detected an XML error".