Vulkano: Cause of `assertion failed: layout.num_sets() > set_id` persistent.rs:76

[simvux]

• Version of vulkano: 1.11.1
• OS: Void Linux
• GPU: Intel(R) HD Graphics 520 (Skylake GT2)
• GPU Driver: Proprietary

Issue

let set = Arc::new(
            PersistentDescriptorSet::start(pipeline, 0)
                .add_sampled_image(tex, sampler)
                .unwrap()
                .build()
                .unwrap(),
        );

Fails with thread 'main' panicked at 'assertion failed: layout.num_sets() > set_id', /home/simon/.cargo/registry/src/github.com-1ecc6299db9ec823/vulkano-0.11.1/src/descriptor/descriptor_set/persistent.rs:76:9

What does this mean exactly? Am i creating my GraphicsPipeline incorrectly?

        self.draw_pipeline = Arc::new(
            pipeline::GraphicsPipeline::start()
                .vertex_input_single_buffer::<vertex::Vertex>()
                .vertex_shader(vs.main_entry_point(), ()) 
                .triangle_strip()
                .viewports_dynamic_scissors_irrelevant(1)
                .fragment_shader(fs.main_entry_point(), ())
                .blend_alpha_blending()
                .render_pass(framebuffer::Subpass::from(self.render_pass.clone(), 0).unwrap())
                .build(self.device.clone())
                .unwrap(),
        );

[simvux]

Ye so this is kind of embarrassing. My philosophy was "I'll crate the most basic glsl and then sort it out later". However turns out the issue was that I had forgotten to add layout(set = 0, binding = 0) uniform sampler2D tex; to my glsl.