### Godot version

4.0.3

### System information

Win7

### Issue description

![image](https://github.com/godotengine/godot/assets/28286958/abec9d3c-e078-424c-9430-d9fe8897aad6)


### Steps to reproduce

1. Create shader
2. Add uint with hex, e.g. 0xffffu

### Minimal reproduction project

N/A
keyword_completion_context ^= CF_UNIFORM_KEYWORD;
					}
				}
#endif 
				tk = _get_token();
				if (tk.type != TK_UNIFORM) {
					_set_expected_after_error("uniform", "global");
					return ERR_PARSE_ERROR;
				}
				uniform_scope = ShaderNode::Uniform::SCOPE_GLOBAL;
			};
				[[fallthrough]];
			case TK_INSTANCE: {
				if (tk.type == TK_INSTANCE) {
#ifdef DEBUG_ENABLED
					keyword_completion_context = CF_UNIFORM_KEYWORD;
					if (_lookup_next(next)) {
						if (next.type == TK_UNIFORM) {
							keyword_completion_context ^= CF_UNIFORM_KEYWORD;
						}
					}
#endif 
					if (String(shader_type_identifier) != "spatial") {
						_set_error(vformat(RTR("Uniform instances are not yet implemented for '%s' shaders."), shader_type_identifier));
						return ERR_PARSE_ERROR;
					}
					if (OS::get_singleton()->get_current_rendering_method() == "gl_compatibility") {
						_set_error(RTR("Uniform instances are not supported in gl_compatibility shaders."));
						return ERR_PARSE_ERROR;
					}