I don't know what triggers this. svn trunk as of today.
Thread 1 "texmacs.bin" received signal SIGSEGV, Segmentation fault.
0x0000000000d6fd01 in unicode_font_rep::get_xpositions (this=0x50b26b0, s=..., xpos=0x7fffffffb0d4, ligf=true)
at ./Plugins/Freetype/unicode_font.cpp:309
309 for (int j= start; j<i; j++) xpos[j]= x;
(gdb) where full
#0 0x0000000000d6fd01 in unicode_font_rep::get_xpositions(string, int*, bool) (this=0x50b26b0, s=..., xpos=0x7fffffffb0d4, ligf=true) at ./Plugins/Freetype/unicode_font.cpp:309
j = 4043
start = 0
pc = 4294967295
next = 0x39ca5f0
i = 21442
n = 20
x = 0
uc = 60
#1 0x0000000000d6fe03 in unicode_font_rep::get_xpositions(string, int*) (this=0x50b26b0, s=..., xpos=0x7fffffffb0d4)
at ./Plugins/Freetype/unicode_font.cpp:319
#2 0x0000000000c54a36 in smart_font_rep::get_xpositions(string, int*) (this=0x4964718, s=..., xpos=0x7fffffffb0d0)
at ./Graphics/Fonts/smart_font.cpp:1168
nr = 4
r = {rep = 0x4f03af8}
start = 1
x = 11197
i = 21
n = 21
#3 0x0000000000ca0284 in text_box_rep::find_box_path(int, int, int, bool, bool&) (this=
0x0, x=0, y=0, delta=0, force=false, address@hidden: <error reading variable>) at ./Typeset/Boxes/Basic/text_boxes.cpp:194
Python Exception <class 'gdb.error'> value requires 85772 bytes, which is more than max-value-size:
xpos = #4 0x0000000000000000 in ()