Auto merge of #54389 - kennytm:rollup, r=kennytm

Rollup of 15 pull requests

Successful merges:

 - #52813 (Duration div mul extras)
 - #53470 (Warn about metadata loader errors)
 - #54233 (Remove LLVM 3.9 workaround.)
 - #54257 (Switch wasm math symbols to their original names)
 - #54258 (Enable fatal warnings for the wasm32 linker)
 - #54266 (Update LLVM to fix "bool" arguments on PPC32)
 - #54290 (Switch linker for aarch64-pc-windows-msvc from LLD to MSVC)
 - #54292 (Suggest array indexing when tuple indexing on an array)
 - #54295 (A few cleanups and minor improvements to rustc/traits)
 - #54298 (miri: correctly compute expected alignment for field)
 - #54333 (Update The Book to latest)
 - #54337 (Remove unneeded clone() from tests in librustdoc)
 - #54346 (rustc: future-proof error reporting for polymorphic constants in types.)
 - #54362 (Pass --batch to gdb)
 - #54367 (Add regression test for thread local static mut borrows)

src/test/ui/issues/issue-53712.rs

@@ -0,0 +1,9 @@
+// issue #53712: make the error generated by using tuple indexing on an array more specific
+
+fn main() {
+    let arr = [10, 20, 30, 40, 50];
+    arr.0;
+    //~^ ERROR no field `0` on type `[{integer}; 5]` [E0609]
+    //~| HELP instead of using tuple indexing, use array indexing
+    //~| SUGGESTION arr[0]
+}

src/test/ui/issues/issue-53712.stderr

@@ -0,0 +1,11 @@
+error[E0609]: no field `0` on type `[{integer}; 5]`
+  --> $DIR/issue-53712.rs:5:9
+   |
+LL |     arr.0;
+   |     ----^
+   |     |
+   |     help: instead of using tuple indexing, use array indexing: `arr[0]`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0609`.

src/test/ui/nll/borrowck-thread-local-static-mut-borrow-outlives-fn.rs

@@ -0,0 +1,35 @@
+// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+//
+// run-pass
+//
+// FIXME(#54366) - We probably shouldn't allow #[thread_local] static mut to get a 'static lifetime.
+
+#![feature(nll)]
+#![feature(thread_local)]
+
+#[thread_local]
+static mut X1: u64 = 0;
+
+struct S1 {
+    a: &'static mut u64,
+}
+
+impl S1 {
+    fn new(_x: u64) -> S1 {
+        S1 {
+            a: unsafe { &mut X1 },
+        }
+    }
+}
+
+fn main() {
+    S1::new(0).a;
+}