Unchecked vector pre-allocation #151
Description
When playing around with afl, I found the following example:
extern crate rmpv;
use std::io::Cursor;
fn main() {
let data = [219, 175, 142, 142, 201, 219, 128, 0, 50, 175, 142, 196, 100, 212, 185];
let mut cursor = Cursor::new(data);
let decoded = rmpv::decode::value::read_value(&mut cursor);
println!("Done: {:?}", decoded);
}It takes almost 200ms in release mode and 2min 47s in debug mode to run.