Rollup of 8 pull requests

Cargo.lock

@@ -4805,18 +4805,18 @@ checksum = "1ef965a420fe14fdac7dd018862966a4c14094f900e1650bbc71ddd7d580c8af"
 
 [[package]]
 name = "semver"
-version = "1.0.12"
+version = "1.0.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a2333e6df6d6598f2b1974829f853c2b4c5f4a6e503c10af918081aa6f8564e1"
+checksum = "e25dfac463d778e353db5be2449d1cce89bd6fd23c9f1ea21310ce6e5a1b29c4"
 dependencies = [
  "serde",
 ]
 
 [[package]]
 name = "serde"
-version = "1.0.147"
+version = "1.0.152"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d193d69bae983fc11a79df82342761dfbf28a99fc8d203dca4c3c1b590948965"
+checksum = "bb7d1f0d3021d347a83e556fc4683dea2ea09d87bccdf88ff5c12545d89d5efb"
 dependencies = [
  "serde_derive",
 ]
@@ -4833,9 +4833,9 @@ dependencies = [
 
 [[package]]
 name = "serde_derive"
-version = "1.0.147"
+version = "1.0.152"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4f1d362ca8fc9c3e3a7484440752472d68a6caa98f1ab81d99b5dfe517cec852"
+checksum = "af487d118eecd09402d70a5d72551860e788df87b464af30e5ea6a38c75c541e"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -4853,9 +4853,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.85"
+version = "1.0.91"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e55a28e3aaef9d5ce0506d0a14dbba8054ddc7e499ef522dd8b26859ec9d4a44"
+checksum = "877c235533714907a8c2464236f5c4b2a17262ef1bd71f38f35ea592c8da6883"
 dependencies = [
  "indexmap",
  "itoa",
@@ -5133,9 +5133,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.102"
+version = "1.0.107"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3fcd952facd492f9be3ef0d0b7032a6e442ee9b361d4acc2b1d0c4aaa5f613a1"
+checksum = "1f4064b5b16e03ae50984a5a8ed5d4f8803e6bc1fd170a3cda91a1be4b18e3f5"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -5309,6 +5309,7 @@ dependencies = [
  "lazy_static",
  "miropt-test-tools",
  "regex",
+ "semver",
  "termcolor",
  "walkdir",
 ]

compiler/rustc_builtin_macros/src/format.rs

@@ -638,7 +638,7 @@ fn report_missing_placeholders(
                 if show_doc_note {
                     diag.note(concat!(
                         stringify!($kind),
-                        " formatting not supported; see the documentation for `std::fmt`",
+                        " formatting is not supported; see the documentation for `std::fmt`",
                     ));
                 }
                 if suggestions.len() > 0 {

compiler/rustc_lint/src/builtin.rs

@@ -1392,7 +1392,7 @@ declare_lint! {
     ///
     /// The attribute must be used in conjunction with the
     /// [`closure_track_caller` feature flag]. Otherwise, the `#[track_caller]`
-    /// annotation will function as as no-op.
+    /// annotation will function as a no-op.
     ///
     /// [`closure_track_caller` feature flag]: https://doc.rust-lang.org/beta/unstable-book/language-features/closure-track-caller.html
     UNGATED_ASYNC_FN_TRACK_CALLER,

compiler/rustc_lint/src/early.rs

@@ -29,7 +29,7 @@ macro_rules! lint_callback { ($cx:expr, $f:ident, $($args:expr),*) => ({
     $cx.pass.$f(&$cx.context, $($args),*);
 }) }
 
-/// Implements the AST traversal for early lint passes. `T` provides the the
+/// Implements the AST traversal for early lint passes. `T` provides the
 /// `check_*` methods.
 pub struct EarlyContextAndPass<'a, T: EarlyLintPass> {
     context: EarlyContext<'a>,

compiler/rustc_lint/src/late.rs

@@ -40,7 +40,7 @@ macro_rules! lint_callback { ($cx:expr, $f:ident, $($args:expr),*) => ({
     $cx.pass.$f(&$cx.context, $($args),*);
 }) }
 
-/// Implements the AST traversal for late lint passes. `T` provides the the
+/// Implements the AST traversal for late lint passes. `T` provides the
 /// `check_*` methods.
 pub struct LateContextAndPass<'tcx, T: LateLintPass<'tcx>> {
     context: LateContext<'tcx>,

compiler/rustc_middle/src/mir/visit.rs

@@ -3,15 +3,15 @@
 //! ## Overview
 //!
 //! There are two visitors, one for immutable and one for mutable references,
-//! but both are generated by the following macro. The code is written according
-//! to the following conventions:
+//! but both are generated by the `make_mir_visitor` macro.
+//! The code is written according to the following conventions:
 //!
 //! - introduce a `visit_foo` and a `super_foo` method for every MIR type
 //! - `visit_foo`, by default, calls `super_foo`
 //! - `super_foo`, by default, destructures the `foo` and calls `visit_foo`
 //!
-//! This allows you as a user to override `visit_foo` for types are
-//! interested in, and invoke (within that method) call
+//! This allows you to override `visit_foo` for types you are
+//! interested in, and invoke (within that method call)
 //! `self.super_foo` to get the default behavior. Just as in an OO
 //! language, you should never call `super` methods ordinarily except
 //! in that circumstance.

compiler/rustc_trait_selection/src/solve/overflow.rs

@@ -36,7 +36,7 @@ impl OverflowData {
 
     #[inline]
     pub(super) fn has_overflow(&self, depth: usize) -> bool {
-        self.current_limit.value_within_limit(depth + self.additional_depth)
+        !self.current_limit.value_within_limit(depth + self.additional_depth)
     }
 
     /// Updating the current limit when hitting overflow.

src/bootstrap/bootstrap.py

@@ -934,8 +934,7 @@ def main():
     if len(sys.argv) > 1 and sys.argv[1] == 'help':
         sys.argv = [sys.argv[0], '-h'] + sys.argv[2:]
 
-    help_triggered = (
-        '-h' in sys.argv) or ('--help' in sys.argv) or (len(sys.argv) == 1)
+    help_triggered = len(sys.argv) == 1 or any(x in ["-h", "--help", "--version"] for x in sys.argv)
     try:
         bootstrap(help_triggered)
         if not help_triggered:

src/librustdoc/clean/mod.rs

@@ -1960,7 +1960,6 @@ pub(crate) fn clean_variant_def<'tcx>(variant: &ty::VariantDef, cx: &mut DocCont
             variant.fields.iter().map(|field| clean_middle_field(field, cx)).collect(),
         ),
         None => VariantKind::Struct(VariantStruct {
-            ctor_kind: None,
             fields: variant.fields.iter().map(|field| clean_middle_field(field, cx)).collect(),
         }),
     };
@@ -1985,7 +1984,6 @@ fn clean_variant_data<'tcx>(
 
     let kind = match variant {
         hir::VariantData::Struct(..) => VariantKind::Struct(VariantStruct {
-            ctor_kind: None,
             fields: variant.fields().iter().map(|x| clean_field(x, cx)).collect(),
         }),
         hir::VariantData::Tuple(..) => {

src/librustdoc/clean/types.rs

@@ -2111,7 +2111,6 @@ impl Union {
 /// only as a variant in an enum.
 #[derive(Clone, Debug)]
 pub(crate) struct VariantStruct {
-    pub(crate) ctor_kind: Option<CtorKind>,
     pub(crate) fields: Vec<Item>,
 }
 

src/librustdoc/html/render/print_item.rs

@@ -1229,16 +1229,7 @@ fn item_enum(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, e: &clean::
                                 w.write_str(")");
                             }
                             clean::VariantKind::Struct(ref s) => {
-                                render_struct(
-                                    w,
-                                    v,
-                                    None,
-                                    s.ctor_kind,
-                                    &s.fields,
-                                    "    ",
-                                    false,
-                                    cx,
-                                );
+                                render_struct(w, v, None, None, &s.fields, "    ", false, cx);
                             }
                         },
                         _ => unreachable!(),

src/librustdoc/html/static/css/rustdoc.css

@@ -76,8 +76,6 @@
 }
 
 * {
-	-webkit-box-sizing: border-box;
-	-moz-box-sizing: border-box;
 	box-sizing: border-box;
 }
 

src/librustdoc/visit_ast.rs

@@ -410,7 +410,7 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
 
     /// This method will create a new module and push it onto the "modules stack" then call
     /// `visit_mod_contents`. Once done, it'll remove it from the "modules stack" and instead
-    /// add into into the list of modules of the current module.
+    /// add into the list of modules of the current module.
     fn enter_mod(&mut self, id: hir::HirId, m: &'tcx hir::Mod<'tcx>, name: Symbol) {
         self.modules.push(Module::new(name, id, m.spans.inner_span));
 

src/test/ui/borrowck/borrowck-drop-from-guard.rs

@@ -1,3 +1,5 @@
+#![feature(if_let_guard)]
+
 fn foo(_:String) {}
 
 fn main()
@@ -8,4 +10,11 @@ fn main()
         Some(_) => {}
         None => { foo(my_str); } //~ ERROR [E0382]
     }
+
+    let my_str = "hello".to_owned();
+    match Some(42) {
+        Some(_) if let Some(()) = { drop(my_str); None } => {}
+        Some(_) => {}
+        None => { foo(my_str); } //~ ERROR [E0382]
+    }
 }

src/test/ui/borrowck/borrowck-drop-from-guard.stderr

@@ -1,5 +1,5 @@
 error[E0382]: use of moved value: `my_str`
-  --> $DIR/borrowck-drop-from-guard.rs:9:23
+  --> $DIR/borrowck-drop-from-guard.rs:11:23
    |
 LL |     let my_str = "hello".to_owned();
    |         ------ move occurs because `my_str` has type `String`, which does not implement the `Copy` trait
@@ -15,6 +15,23 @@ help: consider cloning the value if the performance cost is acceptable
 LL |         Some(_) if { drop(my_str.clone()); false } => {}
    |                                 ++++++++
 
-error: aborting due to previous error
+error[E0382]: use of moved value: `my_str`
+  --> $DIR/borrowck-drop-from-guard.rs:18:23
+   |
+LL |     let my_str = "hello".to_owned();
+   |         ------ move occurs because `my_str` has type `String`, which does not implement the `Copy` trait
+LL |     match Some(42) {
+LL |         Some(_) if let Some(()) = { drop(my_str); None } => {}
+   |                                          ------ value moved here
+LL |         Some(_) => {}
+LL |         None => { foo(my_str); }
+   |                       ^^^^^^ value used here after move
+   |
+help: consider cloning the value if the performance cost is acceptable
+   |
+LL |         Some(_) if let Some(()) = { drop(my_str.clone()); None } => {}
+   |                                                ++++++++
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0382`.

src/test/ui/borrowck/borrowck-mutate-in-guard.rs

@@ -1,9 +1,11 @@
+#![feature(if_let_guard)]
+
 enum Enum<'a> {
     A(&'a isize),
     B(bool),
 }
 
-fn foo() -> isize {
+fn if_guard() -> isize {
     let mut n = 42;
     let mut x = Enum::A(&mut n);
     match x {
@@ -16,6 +18,17 @@ fn foo() -> isize {
     }
 }
 
-fn main() {
-    foo();
+fn if_let_guard() -> isize {
+    let mut n = 42;
+    let mut x = Enum::A(&mut n);
+    match x {
+        Enum::A(_) if let Some(()) = { x = Enum::B(false); None } => 1,
+        //~^ ERROR cannot assign `x` in match guard
+        Enum::A(_) if let Some(()) = { let y = &mut x; *y = Enum::B(false); None } => 1,
+        //~^ ERROR cannot mutably borrow `x` in match guard
+        Enum::A(p) => *p,
+        Enum::B(_) => 2,
+    }
 }
+
+fn main() {}

src/test/ui/borrowck/borrowck-mutate-in-guard.stderr

@@ -1,20 +1,37 @@
 error[E0510]: cannot assign `x` in match guard
-  --> $DIR/borrowck-mutate-in-guard.rs:10:25
+  --> $DIR/borrowck-mutate-in-guard.rs:12:25
    |
 LL |     match x {
    |           - value is immutable in match guard
 LL |         Enum::A(_) if { x = Enum::B(false); false } => 1,
    |                         ^^^^^^^^^^^^^^^^^^ cannot assign
 
 error[E0510]: cannot mutably borrow `x` in match guard
-  --> $DIR/borrowck-mutate-in-guard.rs:12:33
+  --> $DIR/borrowck-mutate-in-guard.rs:14:33
    |
 LL |     match x {
    |           - value is immutable in match guard
 ...
 LL |         Enum::A(_) if { let y = &mut x; *y = Enum::B(false); false } => 1,
    |                                 ^^^^^^ cannot mutably borrow
 
-error: aborting due to 2 previous errors
+error[E0510]: cannot assign `x` in match guard
+  --> $DIR/borrowck-mutate-in-guard.rs:25:40
+   |
+LL |     match x {
+   |           - value is immutable in match guard
+LL |         Enum::A(_) if let Some(()) = { x = Enum::B(false); None } => 1,
+   |                                        ^^^^^^^^^^^^^^^^^^ cannot assign
+
+error[E0510]: cannot mutably borrow `x` in match guard
+  --> $DIR/borrowck-mutate-in-guard.rs:27:48
+   |
+LL |     match x {
+   |           - value is immutable in match guard
+...
+LL |         Enum::A(_) if let Some(()) = { let y = &mut x; *y = Enum::B(false); None } => 1,
+   |                                                ^^^^^^ cannot mutably borrow
+
+error: aborting due to 4 previous errors
 
 For more information about this error, try `rustc --explain E0510`.

src/test/ui/borrowck/issue-31287-drop-in-guard.rs

@@ -1,8 +1,15 @@
+#![feature(if_let_guard)]
+
 fn main() {
     let a = Some("...".to_owned());
     let b = match a {
         Some(_) if { drop(a); false } => None,
         x => x, //~ ERROR use of moved value: `a`
     };
-    println!("{:?}", b);
+
+    let a = Some("...".to_owned());
+    let b = match a {
+        Some(_) if let Some(()) = { drop(a); None } => None,
+        x => x, //~ ERROR use of moved value: `a`
+    };
 }

src/test/ui/borrowck/issue-31287-drop-in-guard.stderr

@@ -1,5 +1,5 @@
 error[E0382]: use of moved value: `a`
-  --> $DIR/issue-31287-drop-in-guard.rs:5:9
+  --> $DIR/issue-31287-drop-in-guard.rs:7:9
    |
 LL |     let a = Some("...".to_owned());
    |         - move occurs because `a` has type `Option<String>`, which does not implement the `Copy` trait
@@ -14,6 +14,22 @@ help: consider cloning the value if the performance cost is acceptable
 LL |         Some(_) if { drop(a.clone()); false } => None,
    |                            ++++++++
 
-error: aborting due to previous error
+error[E0382]: use of moved value: `a`
+  --> $DIR/issue-31287-drop-in-guard.rs:13:9
+   |
+LL |     let a = Some("...".to_owned());
+   |         - move occurs because `a` has type `Option<String>`, which does not implement the `Copy` trait
+LL |     let b = match a {
+LL |         Some(_) if let Some(()) = { drop(a); None } => None,
+   |                                          - value moved here
+LL |         x => x,
+   |         ^ value used here after move
+   |
+help: consider cloning the value if the performance cost is acceptable
+   |
+LL |         Some(_) if let Some(()) = { drop(a.clone()); None } => None,
+   |                                           ++++++++
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0382`.

src/test/ui/fmt/ifmt-bad-arg.stderr

@@ -170,7 +170,7 @@ LL |     format!("foo %s baz", "bar");
    |                  |
    |                  help: format specifiers use curly braces: `{}`
    |
-   = note: printf formatting not supported; see the documentation for `std::fmt`
+   = note: printf formatting is not supported; see the documentation for `std::fmt`
 
 error: invalid format string: expected `'}'`, found `'t'`
   --> $DIR/ifmt-bad-arg.rs:75:1

src/test/ui/fmt/issue-89173.rs

@@ -10,5 +10,5 @@ fn main() {
     //~| NOTE: argument never used
     //~| NOTE: argument never used
     //~| NOTE: format specifiers use curly braces, and you have to use a positional or named parameter for the width
-    //~| NOTE: printf formatting not supported
+    //~| NOTE: printf formatting is not supported
 }

src/test/ui/fmt/issue-89173.stderr

@@ -12,7 +12,7 @@ note: format specifiers use curly braces, and you have to use a positional or na
    |
 LL |     print!("%0*x", width, num);
    |             ^^^^
-   = note: printf formatting not supported; see the documentation for `std::fmt`
+   = note: printf formatting is not supported; see the documentation for `std::fmt`
 
 error: aborting due to previous error