Fix compatibility warnings and errors in examples.

examples/managed_queue/Cargo.toml

@@ -4,6 +4,6 @@ version = "0.0.0"
 workspace = "../.."
 
 [dependencies]
-crossbeam = "*"
+crossbeam = "0.4"
 rocket = { path = "../../lib" }
 rocket_codegen = { path = "../../codegen" }

examples/managed_queue/src/main.rs

@@ -6,7 +6,7 @@ extern crate rocket;
 
 #[cfg(test)] mod tests;
 
-use crossbeam::sync::MsQueue;
+use crossbeam::queue::MsQueue;
 use rocket::State;
 
 #[derive(FromForm, Debug)]

examples/pastebin/Cargo.toml

@@ -6,4 +6,4 @@ workspace = "../../"
 [dependencies]
 rocket = { path = "../../lib" }
 rocket_codegen = { path = "../../codegen" }
-rand = "0.3"
+rand = "0.5"

examples/pastebin/src/paste_id.rs

@@ -3,7 +3,7 @@ use std::borrow::Cow;
 
 use rocket::request::FromParam;
 use rocket::http::RawStr;
-use rand::{self, Rng};
+use rand::{self, RngCore};
 
 /// Table to retrieve base62 values from.
 const BASE62: &'static [u8] = b"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
@@ -20,7 +20,7 @@ impl<'a> PasteID<'a> {
         let mut id = String::with_capacity(size);
         let mut rng = rand::thread_rng();
         for _ in 0..size {
-            id.push(BASE62[rng.gen::<usize>() % 62] as char);
+            id.push(BASE62[(rng.next_u32() % 62) as usize] as char);
         }
 
         PasteID(Cow::Owned(id))

examples/todo/Cargo.toml

@@ -14,7 +14,7 @@ dotenv = "0.10"
 
 [dev-dependencies]
 parking_lot = {version = "0.4", features = ["nightly"]}
-rand = "0.3"
+rand = "0.5"
 
 [dependencies.rocket_contrib]
 path = "../../contrib"

examples/todo/src/tests.rs

@@ -3,7 +3,7 @@ extern crate rand;
 
 use super::task::Task;
 use self::parking_lot::Mutex;
-use self::rand::{Rng, thread_rng};
+use self::rand::{Rng, thread_rng, distributions::Alphanumeric};
 
 use rocket::local::Client;
 use rocket::http::{Status, ContentType};
@@ -90,7 +90,7 @@ fn test_many_insertions() {
 
         for i in 0..ITER {
             // Issue a request to insert a new task with a random description.
-            let desc: String = rng.gen_ascii_chars().take(12).collect();
+            let desc: String = rng.sample_iter(&Alphanumeric).take(12).collect();
             client.post("/todo")
                 .header(ContentType::Form)
                 .body(format!("description={}", desc))