Use macro

fuzz/fuzzers/parse.rs

@@ -1,16 +1,10 @@
 #![no_main]
-
-extern crate libfuzzer_sys;
-
+#[macro_use] extern crate libfuzzer_sys;
 extern crate url;
-use std::slice;
 use std::str;
 
-#[export_name="LLVMFuzzerTestOneInput"]
-pub extern fn go(data: *const u8, size: isize) -> i32 {
-	let slice = unsafe { slice::from_raw_parts(data, size as usize) };
-	if let Ok(utf8) = str::from_utf8(slice) {
+fuzz_target!(|data: &[u8]| {
+	if let Ok(utf8) = str::from_utf8(data) {
 		let url = url::Url::parse(utf8);
 	}
-	return 0;
-}
+});