Update to Rust 1.71

.github/workflows/main.yml

@@ -12,8 +12,8 @@ jobs:
     - name: Install Rust
       run: |
         rustup set profile minimal
-        rustup toolchain install 1.70 -c rust-docs
-        rustup default 1.70
+        rustup toolchain install 1.71 -c rust-docs
+        rustup default 1.71
     - name: Install mdbook
       run: |
         mkdir bin

listings/ch02-guessing-game-tutorial/listing-02-04/output.txt

@@ -18,9 +18,9 @@ error[E0308]: mismatched types
     = note: expected reference `&String`
                found reference `&{integer}`
 note: method defined here
-   --> /Users/carolnichols/.rustup/toolchains/1.70-aarch64-apple-darwin/lib/rustlib/src/rust/library/core/src/cmp.rs:784:8
+   --> /Users/carolnichols/.rustup/toolchains/1.71-aarch64-apple-darwin/lib/rustlib/src/rust/library/core/src/cmp.rs:775:8
     |
-784 |     fn cmp(&self, other: &Self) -> Ordering;
+775 |     fn cmp(&self, other: &Self) -> Ordering;
     |        ^^^
 
 For more information about this error, try `rustc --explain E0308`.

listings/ch04-understanding-ownership/listing-04-06/output.txt

@@ -9,7 +9,7 @@ error[E0596]: cannot borrow `*some_string` as mutable, as it is behind a `&` ref
 help: consider changing this to be a mutable reference
   |
 7 | fn change(some_string: &mut String) {
-  |                        ~~~~~~~~~~~
+  |                         +++
 
 For more information about this error, try `rustc --explain E0596`.
 error: could not compile `ownership` (bin "ownership") due to previous error

listings/ch06-enums-and-pattern-matching/no-listing-10-non-exhaustive-match/output.txt

@@ -7,12 +7,12 @@ error[E0004]: non-exhaustive patterns: `None` not covered
     |               ^ pattern `None` not covered
     |
 note: `Option<i32>` defined here
-   --> /Users/carolnichols/.rustup/toolchains/1.70-aarch64-apple-darwin/lib/rustlib/src/rust/library/core/src/option.rs:568:5
+   --> /Users/carolnichols/.rustup/toolchains/1.71-aarch64-apple-darwin/lib/rustlib/src/rust/library/core/src/option.rs:567:5
     |
-564 | pub enum Option<T> {
+563 | pub enum Option<T> {
     | ------------------
 ...
-568 |     None,
+567 |     None,
     |     ^^^^ not covered
     = note: the matched value is of type `Option<i32>`
 help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern or an explicit pattern as shown

listings/ch15-smart-pointers/listing-15-21/output.txt

@@ -6,7 +6,7 @@ error[E0596]: cannot borrow `self.sent_messages` as mutable, as it is behind a `
 58 |             self.sent_messages.push(String::from(message));
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `self` is a `&` reference, so the data it refers to cannot be borrowed as mutable
    |
-help: consider changing that to be a mutable reference
+help: consider changing this to be a mutable reference
    |
 2  |     fn send(&mut self, msg: &str);
    |             ~~~~~~~~~

listings/ch16-fearless-concurrency/listing-16-14/output.txt

@@ -22,9 +22,12 @@ note: required because it's used within this closure
 11  |         let handle = thread::spawn(move || {
     |                                    ^^^^^^^
 note: required by a bound in `spawn`
-   --> /Users/carolnichols/.rustup/toolchains/1.70-aarch64-apple-darwin/lib/rustlib/src/rust/library/std/src/thread/mod.rs:680:8
+   --> /Users/carolnichols/.rustup/toolchains/1.71-aarch64-apple-darwin/lib/rustlib/src/rust/library/std/src/thread/mod.rs:683:8
     |
-680 |     F: Send + 'static,
+680 | pub fn spawn<F, T>(f: F) -> JoinHandle<T>
+    |        ----- required by a bound in this function
+...
+683 |     F: Send + 'static,
     |        ^^^^ required by this bound in `spawn`
 
 For more information about this error, try `rustc --explain E0277`.

listings/ch17-oop/listing-17-10/output.txt

@@ -7,7 +7,7 @@ error[E0277]: the trait bound `String: Draw` is not satisfied
   |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Draw` is not implemented for `String`
   |
   = help: the trait `Draw` is implemented for `Button`
-  = note: required for the cast from `String` to the object type `dyn Draw`
+  = note: required for the cast from `Box<String>` to `Box<dyn Draw>`
 
 For more information about this error, try `rustc --explain E0277`.
 error: could not compile `gui` (bin "gui") due to previous error

listings/ch19-advanced-features/no-listing-18-returns-closure/output.txt

@@ -6,11 +6,15 @@ error[E0746]: return type cannot have an unboxed trait object
 1 | fn returns_closure() -> dyn Fn(i32) -> i32 {
   |                         ^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
   |
-  = note: for information on `impl Trait`, see <https://doc.rust-lang.org/book/ch10-02-traits.html#returning-types-that-implement-traits>
-help: use `impl Fn(i32) -> i32` as the return type, as all return paths are of type `[closure@src/lib.rs:2:5: 2:8]`, which implements `Fn(i32) -> i32`
+help: return an `impl Trait` instead of a `dyn Trait`, if all returned values are the same type
   |
 1 | fn returns_closure() -> impl Fn(i32) -> i32 {
-  |                         ~~~~~~~~~~~~~~~~~~~
+  |                         ~~~~
+help: box the return type, and wrap all of the returned values in `Box::new`
+  |
+1 ~ fn returns_closure() -> Box<dyn Fn(i32) -> i32> {
+2 ~     Box::new(|x| x + 1)
+  |
 
 For more information about this error, try `rustc --explain E0746`.
 error: could not compile `functions-example` (lib) due to previous error

listings/ch20-web-server/listing-20-22/output.txt

@@ -9,9 +9,9 @@ error[E0507]: cannot move out of `worker.thread` which is behind a mutable refer
      |             move occurs because `worker.thread` has type `JoinHandle<()>`, which does not implement the `Copy` trait
      |
 note: `JoinHandle::<T>::join` takes ownership of the receiver `self`, which moves `worker.thread`
-    --> /Users/carolnichols/.rustup/toolchains/1.70-aarch64-apple-darwin/lib/rustlib/src/rust/library/std/src/thread/mod.rs:1557:17
+    --> /Users/carolnichols/.rustup/toolchains/1.71-aarch64-apple-darwin/lib/rustlib/src/rust/library/std/src/thread/mod.rs:1560:17
      |
-1557 |     pub fn join(self) -> Result<T> {
+1560 |     pub fn join(self) -> Result<T> {
      |                 ^^^^
 
 For more information about this error, try `rustc --explain E0507`.

listings/ch20-web-server/no-listing-04-update-worker-definition/output.txt

@@ -7,9 +7,9 @@ error[E0599]: no method named `join` found for enum `Option` in the current scop
      |                           ^^^^ method not found in `Option<JoinHandle<()>>`
      |
 note: the method `join` exists on the type `JoinHandle<()>`
-    --> /Users/carolnichols/.rustup/toolchains/1.70-aarch64-apple-darwin/lib/rustlib/src/rust/library/std/src/thread/mod.rs:1557:5
+    --> /Users/carolnichols/.rustup/toolchains/1.71-aarch64-apple-darwin/lib/rustlib/src/rust/library/std/src/thread/mod.rs:1560:5
      |
-1557 |     pub fn join(self) -> Result<T> {
+1560 |     pub fn join(self) -> Result<T> {
      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 help: consider using `Option::expect` to unwrap the `JoinHandle<()>` value, panicking if the value is an `Option::None`
      |

rust-toolchain

@@ -1 +1 @@
-1.70
+1.71

src/title-page.md

@@ -2,7 +2,7 @@
 
 *by Steve Klabnik and Carol Nichols, with contributions from the Rust Community*
 
-This version of the text assumes you’re using Rust 1.70.0 (released 2023-06-01)
+This version of the text assumes you’re using Rust 1.71.1 (released 2023-08-03)
 or later. See the [“Installation” section of Chapter 1][install]<!-- ignore -->
 to install or update Rust.