#version 460
#extension GL_EXT_mesh_shader : require

layout(local_size_x = 1) in;
layout(triangles, max_vertices = 3, max_primitives = 1) out;

struct Vertex { vec3 worldPos; };
layout(location = 0) out Vertex outVert[];
layout(location = 1) perprimitiveEXT out vec4 outPrim[];

void writeOut(out vec3 v) { v = vec3(1.0); }
void readWrite(inout vec3 v) { v += vec3(1.0); }

void main()
{
    SetMeshOutputsEXT(3, 1);
    uint i = gl_LocalInvocationIndex;

    // Writes: no errors.
    outVert[i].worldPos = vec3(0.0);
    outVert[i].worldPos.x = 1.0;
    outVert[i].worldPos[i] = 1.0;
    writeOut(outVert[i].worldPos);
    gl_MeshVerticesEXT[i].gl_Position.xy = vec2(1.0);
    gl_MeshPrimitivesEXT[0].gl_CullPrimitiveEXT = false;
    gl_PrimitiveTriangleIndicesEXT[0] = uvec3(0, 1, 2);

    // Reads: one error each.
    gl_MeshVerticesEXT[i].gl_Position = vec4(outVert[i].worldPos, 1.0);
    outPrim[0] += vec4(1.0);
    outVert[i].worldPos.x++;
    readWrite(outVert[i].worldPos);
    outPrim[0].x = sin(gl_MeshVerticesEXT[i].gl_Position.x);
    outVert[gl_PrimitiveTriangleIndicesEXT[0].x].worldPos = vec3(0.0);
    bool culled = gl_MeshPrimitivesEXT[0].gl_CullPrimitiveEXT;
}