serde_json regression from 1.0.25 to 1.0.38

Cargo.toml

[package]
name = "json"
version = "0.1.0"
authors = ["David Lutterkort <lutter@watzmann.net>"]
edition = "2018"

[dependencies]
serde_json = { version = "=1.0.38", features = ["arbitrary_precision"] }
#serde_json = { version = "=1.0.25", features = ["arbitrary_precision"] }
serde_derive = "1.0.88"
serde = "1.0.88"

main.rs

#[macro_use]
extern crate serde_derive;
extern crate serde_json;
extern crate serde;
#[derive(Clone, Debug, Deserialize, Serialize, PartialEq)]
#[serde(tag = "type", content = "data")]
pub enum Value {
    String(String),
    Int(i32),
    // Changing this to f64 makes the example work with 1.0.38
    Float(f32),
    Bool(bool),
    List(Vec<Value>),
    Null
}

fn main() {
    let v = Value::Float(159.1);

    let jv = dbg!(serde_json::to_value(v).unwrap());

    // This works with serde_json 1.0.25, but not 1.0.38
    // With that, the error is
    //   "invalid type: map, expected f32"
    let v = dbg!(serde_json::from_value::<Value>(jv));
}