Wrong field is parsed when the `"logicalType": "uuid"` value is set on a field

[edude03]

So this is a strange issue. It seems like if "logicalType": "uuid" is set, it parses the value next field instead of the existing one.

Take a look at this example:

```rust use uuid::Uuid; use std::str::FromStr; use serde::{Serialize}; use avro_rs::{Reader, Writer, Schema}; #[derive(Debug, Serialize)] struct Event { id: Uuid, event_type: String } fn main() { let raw_schema = r#" { "type": "record", "namespace": "something", "name": "TimelineEvent", "fields": [{ "name": "id", "type": "string", "logicalType": "uuid" }, { "name": "event_type", "type": "string" }] } "#; let schema = Schema::parse_str(raw_schema).unwrap(); let e = Event { id: Uuid::from_str("596a6c76-b398-4458-8b25-e5451850a7da").unwrap(), event_type: "user_created".to_string() }; let mut writer = Writer::new(&schema, Vec::new()); writer.append_ser(&e).unwrap(); let serialized = writer.into_inner().unwrap(); let reader = Reader::new(&serialized[..]).unwrap(); for v in reader { println!("The length of the next field (event_type) is {:?}", &e.event_type.len()); println!("{:?}", v.unwrap()); } } ```

Which produces:

Finished dev [unoptimized + debuginfo] target(s) in 1.21s
     Running `target/debug/avro-bug-repro`
The length of the next field (event_type) is 12
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: ConvertStrToUuid(Error(Parser(InvalidLength { expected: Any([36, 32]), found: 12 })))', src/main.rs:46:28
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Removing the logical type "fixes" this issue, but I guess that's not really the solution.

[AlexRiedler]

So the Uuid is actually not getting encoded at all into the payload sadly :( https://github.com/flavray/avro-rs/pull/188 is a workaround, but I think I need to read more about serde first, to see if there is another way to coerce to the correct type.