cleanup

build.rs

@@ -61,7 +61,10 @@ fn main() {
         
         let result = compiler.compile_into_spirv(&shader.source, shader.kind, &shader.src_path.to_str().unwrap(), "main", Some(&options));
         match result {
-            Err(err) => { panic!("Failed: {}", err); },
+            Err(err) => {
+                eprintln!("{}", err); 
+                panic!("shader compilation");
+            },
             Ok(data) => {
                 write(shader.spv_path, data.as_binary_u8()).unwrap();
             }