This is how it crashes in the commit that introduced it, bd3b2c48f69a5169aefb261c041462271c69a07a :


Failed to compile VS: 0:13(43): error: `pos' undeclared
0:13(14): error: operands to arithmetic operators must be numeric
0:13(13): error: operands to arithmetic operators must be numeric

Program source:
#version 130
attribute vec3 primitive;
varying float dash_offset;
uniform vec2 fill_offset;
uniform vec2 fill_size;
varying vec2 fill_pos;
uniform float dash_length;
uniform vec4 v_matrix;
void main() {
       dash_offset = primitive.z / dash_length;
       gl_Position.xy = primitive.xy.xy * v_matrix.xz + v_matrix.yw;
       gl_Position.zw = vec2(0.0,1.0);
       fill_pos = (fill_offset + primitive.xy + pos) / fill_size;
}

Some commit has since changed fill_size to fill_size_inv.

Since the recent d8161aeb50891ae10c5656487ce8f982deed5f9f we now also have vec2_pos undeclared:


Failed to compile VS: 0:11(2): error: `vec2_pos' undeclared
0:11(2): error: value of type vec2 cannot be assigned to variable of type error
0:14(43): error: `pos' undeclared
0:14(14): error: operands to arithmetic operators must be numeric
0:14(13): error: operands to arithmetic operators must be numeric

Program source:
#version 130
attribute vec3 primitive;
varying float dash_offset;
uniform vec2 fill_offset;
uniform vec2 fill_size_inv;
varying vec2 fill_pos;
uniform float dash_length;
uniform vec4 v_matrix;
void main() {
       dash_offset = primitive.z / dash_length;
       vec2_pos = vec2(0,0);
       gl_Position.xy = primitive.xy.xy * v_matrix.xz + v_matrix.yw;
       gl_Position.zw = vec2(0.0,1.0);
       fill_pos = (fill_offset + primitive.xy + pos) * fill_size_inv;
}
(EE) 
Fatal server error:
(EE) GLSL compile failure
(EE)

*** This bug has been marked as a duplicate of bug 99943 ***

Aaah, thanks for pointing out the other bug!

However, I'm afraid this is not a dupe.

To put things in perspective: The patch that introduced bug 99943 has been written in an attempt to solve the bug I described here, and which was originally filed at:

https://bugzilla.opensuse.org/show_bug.cgi?id=1025985

It's similar to bug 97300, but not the same.

Fixed in Git master.

Thanks for fixing this crash!

For the record, the dashes drawn by GLAMOR are wrong, which is already noted as a different bug 99708.