Cryptic error UnexpectedStart if serde structs do not match XML

[GeeWee]

Hi! I'm using quick_xml to deserialize to some serde structs. While I'm still developing the structs against the XML, it happens that I have mismatches between my structs and the XML. If that happens instead of getting an error like "Expected type X at location Y", I get a pretty cryptic error, specifically:

called `Result::unwrap()` on an `Err` value: UnexpectedStart([116, 101, 120, 116])

Which doesn't give me much information to start debugging, about where the issue is, or even what it is.

A real-life-inspired reproduction that creates this error is as follows:

    let xml = r#"
<?xml version='1.0' encoding='UTF-8'?>
    <outerTag>
        <generalComment>
              <text xml:lang="en" index="0">some text</text>
        </generalComment>
    </outerTag>
    "#;

    #[derive(Deserialize)]
    pub struct XmlRoot {
       // Oops you thought this was a string but it's not
        generalComment: String,
    }

    // Error: Unexpected start
    let result = quick_xml::de::from_str::<XmlRoot>(xml).unwrap();