Auto merge of #5790 - dwijnand:dependabot/cargo/crossbeam-0.4, r=alexcrichton

Upgrade to crossbeam 0.4

Supersedes #5789

Cargo.toml

@@ -19,7 +19,7 @@ path = "src/cargo/lib.rs"
 [dependencies]
 atty = "0.2"
 crates-io = { path = "src/crates-io", version = "0.18" }
-crossbeam = "0.3"
+crossbeam-utils = "0.4"
 crypto-hash = "0.3.1"
 curl = "0.4.13"
 env_logger = "0.5.4"

src/cargo/core/compiler/job_queue.rs

@@ -6,7 +6,8 @@ use std::mem;
 use std::sync::mpsc::{channel, Receiver, Sender};
 use std::sync::Arc;
 
-use crossbeam::{self, Scope};
+use crossbeam_utils;
+use crossbeam_utils::scoped::Scope;
 use jobserver::{Acquired, HelperThread};
 
 use core::profiles::Profile;
@@ -165,7 +166,7 @@ impl<'a> JobQueue<'a> {
                 srv.start(move |msg| drop(tx2.send(Message::FixDiagnostic(msg))))
             });
 
-        crossbeam::scope(|scope| self.drain_the_queue(cx, plan, scope, &helper))
+        crossbeam_utils::scoped::scope(|scope| self.drain_the_queue(cx, plan, scope, &helper))
     }
 
     fn drain_the_queue(

src/cargo/lib.rs

@@ -15,7 +15,7 @@ extern crate clap;
 #[cfg(target_os = "macos")]
 extern crate core_foundation;
 extern crate crates_io as registry;
-extern crate crossbeam;
+extern crate crossbeam_utils;
 extern crate curl;
 #[macro_use]
 extern crate failure;