Merge commit '8830dccd1d4c74f1f69b0d3bd982a3f1fcde5807' into sync_cg_clif-2023-06-15

compiler/rustc_codegen_cranelift/src/driver/jit.rs

@@ -4,7 +4,7 @@
 use std::cell::RefCell;
 use std::ffi::CString;
 use std::os::raw::{c_char, c_int};
-use std::sync::{mpsc, Mutex};
+use std::sync::{mpsc, Mutex, OnceLock};
 
 use rustc_codegen_ssa::CrateInfo;
 use rustc_middle::mir::mono::MonoItem;
@@ -13,9 +13,6 @@ use rustc_span::Symbol;
 
 use cranelift_jit::{JITBuilder, JITModule};
 
-// FIXME use std::sync::OnceLock once it stabilizes
-use once_cell::sync::OnceCell;
-
 use crate::{prelude::*, BackendConfig};
 use crate::{CodegenCx, CodegenMode};
 
@@ -29,7 +26,7 @@ thread_local! {
 }
 
 /// The Sender owned by the rustc thread
-static GLOBAL_MESSAGE_SENDER: OnceCell<Mutex<mpsc::Sender<UnsafeMessage>>> = OnceCell::new();
+static GLOBAL_MESSAGE_SENDER: OnceLock<Mutex<mpsc::Sender<UnsafeMessage>>> = OnceLock::new();
 
 /// A message that is sent from the jitted runtime to the rustc thread.
 /// Senders are responsible for upholding `Send` semantics.
@@ -325,7 +322,7 @@ fn dep_symbol_lookup_fn(
             Linkage::NotLinked | Linkage::IncludedFromDylib => {}
             Linkage::Static => {
                 let name = crate_info.crate_name[&cnum];
-                let mut err = sess.struct_err(&format!("Can't load static lib {}", name));
+                let mut err = sess.struct_err(format!("Can't load static lib {}", name));
                 err.note("rustc_codegen_cranelift can only load dylibs in JIT mode.");
                 err.emit();
             }