UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:45.0) Gecko/20100101 Firefox/45.0

Example URL:
See attached reduced test case.

Steps to reproduce the problem:
1. Open the attached math.html file in Chrome 49.
2. Note that the page appears blank.
3. Comment out the <base> tag in the HTML file and reload.
4. Note that the glyph '9' appears.

What is the expected behavior?
The glyph should appear even with the <base> tag.

What went wrong?
The glyph does not appear and the page is blank.

Does it occur on multiple sites: N/A

Is it a problem with a plugin? No 

Did this work before? Yes Chrome 48

Does this work in other browsers? N/A 

Chrome version: Version 49.0.2623.75 (64-bit)  Channel: stable
OS Version: OS X 10.11
Flash Version: Shockwave Flash 20.0 r0

Safari 9.0.3 (11601.4.4) has the same behavior as Chrome 48.
Firefox 45.0 has the same behavior as Chrome 49.

As far as I can tell from my inexpert reading of the SVG spec (https://www.w3.org/TR/SVG/animate.html#HrefAttribute), this reference should resolve correctly even with the <base> element present.  But given that Firefox has the same behavior as Chrome 49, I recognize that this may be Chrome adjusting behavior to match the spec rather than a bug.  If that is the case, I'd greatly appreciate any advice on how to modify the SVG to correctly resolve the reference.  Thanks!
 

Deleted: math.html 1.2 KB

math.html 1.2 KB View Download