1.57

.github/workflows/main.yml

@@ -12,8 +12,8 @@ jobs:
     - name: Install Rust
       run: |
         rustup set profile minimal
-        rustup toolchain install 1.56 -c rust-docs
-        rustup default 1.56
+        rustup toolchain install 1.57 -c rust-docs
+        rustup default 1.57
     - name: Install mdbook
       run: |
         mkdir bin

listings/ch03-common-programming-concepts/no-listing-19-statements-vs-expressions/output.txt

@@ -21,9 +21,14 @@ warning: unnecessary parentheses around assigned value
  --> src/main.rs:2:13
   |
 2 |     let x = (let y = 6);
-  |             ^^^^^^^^^^^ help: remove these parentheses
+  |             ^         ^
   |
   = note: `#[warn(unused_parens)]` on by default
+help: remove these parentheses
+  |
+2 -     let x = (let y = 6);
+2 +     let x = let y = 6;
+  | 
 
 For more information about this error, try `rustc --explain E0658`.
 warning: `functions` (bin "functions") generated 1 warning

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

@@ -6,7 +6,7 @@ error[E0596]: cannot borrow `*some_string` as mutable, as it is behind a `&` ref
 7 | fn change(some_string: &String) {
   |                        ------- help: consider changing this to be a mutable reference: `&mut String`
 8 |     some_string.push_str(", world");
-  |     ^^^^^^^^^^^ `some_string` is a `&` reference, so the data it refers to cannot be borrowed as mutable
+  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `some_string` is a `&` reference, so the data it refers to cannot be borrowed as mutable
 
 For more information about this error, try `rustc --explain E0596`.
 error: could not compile `ownership` due to previous error

listings/ch10-generic-types-traits-and-lifetimes/listing-10-24/output.txt

@@ -4,7 +4,7 @@ error[E0597]: `string2` does not live long enough
  --> src/main.rs:6:44
   |
 6 |         result = longest(string1.as_str(), string2.as_str());
-  |                                            ^^^^^^^ borrowed value does not live long enough
+  |                                            ^^^^^^^^^^^^^^^^ borrowed value does not live long enough
 7 |     }
   |     - `string2` dropped here while still borrowed
 8 |     println!("The longest string is {}", result);

listings/ch10-generic-types-traits-and-lifetimes/no-listing-09-unrelated-lifetime/output.txt

@@ -1,13 +1,10 @@
 $ cargo run
    Compiling chapter10 v0.1.0 (file:///projects/chapter10)
-error[E0515]: cannot return value referencing local variable `result`
+error[E0515]: cannot return reference to local variable `result`
   --> src/main.rs:11:5
    |
 11 |     result.as_str()
-   |     ------^^^^^^^^^
-   |     |
-   |     returns a value referencing data owned by the current function
-   |     `result` is borrowed here
+   |     ^^^^^^^^^^^^^^^ returns a reference to data owned by the current function
 
 For more information about this error, try `rustc --explain E0515`.
 error: could not compile `chapter10` due to previous error

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

@@ -7,7 +7,7 @@ error[E0596]: cannot borrow `self.sent_messages` as mutable, as it is behind a `
    |             ----- help: consider changing that to be a mutable reference: `&mut self`
 ...
 58 |             self.sent_messages.push(String::from(message));
-   |             ^^^^^^^^^^^^^^^^^^ `self` is a `&` reference, so the data it refers to cannot be borrowed as mutable
+   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `self` is a `&` reference, so the data it refers to cannot be borrowed as mutable
 
 For more information about this error, try `rustc --explain E0596`.
 error: could not compile `limit-tracker` due to previous error

listings/ch15-smart-pointers/output-only-01-comparing-to-reference/output.txt

@@ -4,7 +4,7 @@ error[E0277]: can't compare `{integer}` with `&{integer}`
  --> src/main.rs:6:5
   |
 6 |     assert_eq!(5, y);
-  |     ^^^^^^^^^^^^^^^^^ no implementation for `{integer} == &{integer}`
+  |     ^^^^^^^^^^^^^^^^ no implementation for `{integer} == &{integer}`
   |
   = help: the trait `PartialEq<&{integer}>` is not implemented for `{integer}`
   = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)

rust-toolchain

@@ -1 +1 @@
-1.56
+1.57

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 1.56 or later with
+This version of the text assumes you’re using Rust 1.57 or later with
 `edition="2018"` in *Cargo.toml* of all projects to use Rust 2018 Edition
 idioms. See the [“Installation” section of Chapter 1][install]<!-- ignore -->
 to install or update Rust, and see the new [Appendix E][editions]<!-- ignore