hot code reload with graphics not working on Windows 10

[Ivo-Balbaert]

V version: 0.1.23 3486118
OS: Windows 10

What did you do?
v -live bounce.v
Compiles ok (with warnings)
then: bounce

What did you expect to see?
A bouncing ball in a graphical window. Change source rgb to change color of ball in realtime.

What did you see instead?
The window with title appears for some seconds, then disappears. No bouncing ball.
Same phenomenon with graph.v example.

Both examples work flawlessly on Ubuntu.
The hot code reloading works on Windows with the example message.v
Cause here seems some kind of wrong interaction between graphics and hot code reloading on Windows.

If the compilation is done with v bounce.v, then bounce shows the bouncing ball (and the warning below about import gx never used does NOT appear, only first 3 warnings)!

Here are the warnings of the compilation with v - live bounce.v:
warning: bounce.v:68:2: reference field Game*.main_wnd must be initialized
warning: bounce.v:68:2: reference field Game*.draw_fn must be initialized
warning: bounce.v:86:2: reference field gg.Cfg.window_user_ptr must be initialized
warning: bounce.v:33:6: the following imports were never used:

• gx
  warning: E:\Vlang\The_Way_to_V\Chapter_12_Advanced_Topics\hot_reload\bounce.v:68:2: reference field Game*.main_wnd must be initialized
  warning: E:\Vlang\The_Way_to_V\Chapter_12_Advanced_Topics\hot_reload\bounce.v:68:2: reference field Game*.draw_fn must be initialized
  warning: E:\Vlang\The_Way_to_V\Chapter_12_Advanced_Topics\hot_reload\bounce.v:86:2: reference field gg.Cfg.window_user_ptr must be initialized
  compiling shared library took 3343 ms
  =========

This is what appears in the command window with bounce started:
create window wnd=00000000037A90A0 ptr==0000000000DFEC70
#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;
}
Starting the game loop...

Windows pops up for +- 5 s, then crashes.

[emily33901]

Yeah this is a known issue - Due to the way linking works on windows you would have to call gladInit() on every hot reload, which is possible, but allowing libraries some triggers for it would complicate things.

Not sure when this is going to be "fixed".

[Ivo-Balbaert]

Thanks for the explanation Emily!