Shader compilation error when calling textureSize on the normal roughness texture

[danbolt]

Tested versions

• Reproduced with Godot v4.3.dev2.official [3524346]
• Cannot reproduce with v4.2.1.stable.official [b09f793]

System information

Godot v4.3.dev2 - Pop!_OS 22.04 LTS - X11 - Vulkan (Forward+) - integrated Intel(R) UHD Graphics 620 (KBL GT2) () - Intel(R) Core(TM) i5-8350U CPU @ 1.70GHz (4 Threads)

Issue description

When creating a shader of type spatial, calling textureSize on the normal roughness texture will cause a shader error.

An example might be:

shader_type spatial;

uniform sampler2D normal_roughness_buffer: hint_normal_roughness_texture;

void fragment() {
	ivec2 normal_roughness_size = textureSize(normal_roughness_buffer, 0);
	ALBEDO = vec3(1.0, 0.0, 0.0);
}

The error output is quite long (>10000 lines) but, the initial text indicates:

servers/rendering/renderer_rd/shader_rd.cpp:470 - Condition "f.is_null()" is true.
  (3) servers/rendering/renderer_rd/shader_rd.cpp:483 - Parameter "p_version->variants" is null.
  servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.cpp:181 - Condition "!shader_singleton->shader.version_is_valid(version)" is true.
  servers/rendering/renderer_rd/shader_rd.cpp:293 - Error compiling Fragment shader, variant #0 (
  #define MODE_RENDER_DEPTH
  ).
  servers/rendering/renderer_rd/shader_rd.cpp:294 - Failed parse:
  WARNING: 0:73: '' : all default precisions are highp; use precision statements to quiet warning, e.g.:
           "precision mediump int; precision highp float;" 
  ERROR: 0:2210: 'normal_roughness_compatibility' : no matching overloaded function found 
  ERROR: 0:2210: '=' :  cannot convert from ' const float' to ' temp highp 2-component vector of int'
  ERROR: 0:2210: '' : compilation terminated 
  ERROR: 3 compilation errors.  No code generated.

Steps to reproduce

1. Create an empty 3D scene
2. Create a MeshInstance with a ShaderMaterial
3. In the mesh's material's shader, call textureSize on the normal roughness texture
4. Note the errors compiling shaders

Minimal reproduction project (MRP)

normal_roughness.zip