V gg.draw_text_def crashes on Linux

gistfile1.txt

1[13:58:06]delian@nemesis: ~/vbreakout $ gdb ./breakout              
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Reading symbols from ./breakout...done.
(gdb) r
Starting program: /home/delian/vbreakout/breakout 
warning: the debug information found in "/lib64/ld-2.23.so" does not match "/lib64/ld-linux-x86-64.so.2" (CRC mismatch).

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
create window wnd=0x65f1c0 ptr==0x7984b0
#version 330 core
layout (location = 0) in vec4 vertex; // <vec2 pos, vec2 tex>
out vec2 TexCoords;

uniform mat4 projection;

void main()
{
    gl_Position = projection * vec4(vertex.xy, 0.0, 1.0);
    TexCoords = vertex.zw;
}  
shader path=simple.vert,
 fpath="simple.frag"
glm ortho(0.000000, 800.000000, 600.000000, 0.000000)
0=0.002500 1=0.000000 2=0.000000 3=0.000000 4=0.000000 5=-0.003333 6=0.000000 7=0.000000 8=0.000000 9=0.000000 10=1.000000 11=0.000000 12=-1.000000 13=1.000000 14=0.000000 15=1.000000 setting o
new gg context VAO=1
shader path=text.vert,
 fpath="text.frag"
glm ortho(0.000000, 800.000000, 0.000000, 600.000000)
new gg text context VAO=2
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TODO: init_bricks
gg create image "assets/paddle.png"
gg create image "assets/ball.png"
[New Thread 0x7ffff1bea700 (LWP 29320)]
[New Thread 0x7ffff13e9700 (LWP 29321)]
 frame: 1 | fps: 0 | game.ball: 3 3 3 3 | game.paddle: 400 585

Thread 1 "breakout" received signal SIGSEGV, Segmentation fault.
0x0000000000422d47 in ustring_substr (u=..., start=0, end=1) at /home/delian//.vlang//breakout.c:2471
2471     start  =  ( *(int*) array__get( u .runes , start) ) ;
(gdb) bt
#0  0x0000000000422d47 in ustring_substr (u=..., start=0, end=1) at /home/delian//.vlang//breakout.c:2471
#1  0x0000000000422e99 in ustring_at (u=..., idx=0) at /home/delian//.vlang//breakout.c:2524
#2  0x0000000000428186 in gg__GG__draw_text (ctx=0xc6ab70, _x=50, _y=61, utext=..., cfg=...) at /home/delian//.vlang//breakout.c:5076
#3  0x0000000000427f89 in gg__GG_draw_text (ctx=0xca56a0, _x=50, _y=50, text=..., cfg=...) at /home/delian//.vlang//breakout.c:5035
#4  0x00000000004286b5 in gg__GG_draw_text_def (ctx=0xca56a0, x=50, y=50, text=...) at /home/delian//.vlang//breakout.c:5177
#5  0x000000000042d2af in Game_draw_stats (g=0x7984b0) at /home/delian//.vlang//breakout.c:7866
#6  0x000000000042d2f3 in Game_draw_scene (g=0x7984b0) at /home/delian//.vlang//breakout.c:7878
#7  0x000000000042d6ff in main (argc=1, argv=0x7fffffffd848) at /home/delian//.vlang//breakout.c:7970
(gdb)