> Hin-Tak, what do you mean by "Google OT-SVG fonts"? They're only one OT-SVG format.
Yes and no. I don't have that many OT-SVG fonts - 3 from Adobe/Mozilla sources, and the rest (more than 2 and less than 10) from Google Fonts. The two sets behave differently, and get processed by two different code paths in freetype2-demos. The Google set triggers the memory exhaustion bug I fixed in freetype2-demos about a month ago; the Adobe/Mozilla set does not.
That was all part of the activities around the time with the Google font SVG subsetting bug. Look at the freetype2-demo log around the same time you investigated and fixed the subletting bug.