Rollup of 9 pull requests

.azure-pipelines/steps/run.yml

@@ -155,6 +155,6 @@ steps:
 - bash: aws s3 cp --acl public-read cpu-usage.csv s3://$DEPLOY_BUCKET/rustc-builds/$BUILD_SOURCEVERSION/cpu-$SYSTEM_JOBNAME.csv
   env:
     AWS_SECRET_ACCESS_KEY: $(AWS_SECRET_ACCESS_KEY)
-  condition: contains(variables, 'AWS_SECRET_ACCESS_KEY')
+  condition: variables['AWS_SECRET_ACCESS_KEY']
   continueOnError: true
   displayName: Upload CPU usage statistics

src/bootstrap/builder.rs

@@ -787,7 +787,7 @@ impl<'a> Builder<'a> {
 
         let libtest_stamp = match cmd {
             "check" | "clippy" | "fix" => check::libtest_stamp(self, cmp, target),
-            _ => compile::libstd_stamp(self, cmp, target),
+            _ => compile::libtest_stamp(self, cmp, target),
         };
 
         let librustc_stamp = match cmd {

src/bootstrap/install.rs

@@ -251,7 +251,10 @@ install!((self, builder, _config),
     };
     Analysis, "analysis", Self::should_build(_config), only_hosts: false, {
         builder.ensure(dist::Analysis {
-            compiler: self.compiler,
+            // Find the actual compiler (handling the full bootstrap option) which
+            // produced the save-analysis data because that data isn't copied
+            // through the sysroot uplifting.
+            compiler: builder.compiler_for(builder.top_stage, builder.config.build, self.target),
             target: self.target
         });
         install_analysis(builder, self.compiler.stage, self.target);

src/liballoc/macros.rs

@@ -42,7 +42,7 @@ macro_rules! vec {
     ($($x:expr),*) => (
         <[_]>::into_vec(box [$($x),*])
     );
-    ($($x:expr,)*) => (vec![$($x),*])
+    ($($x:expr,)*) => ($crate::vec![$($x),*])
 }
 
 // HACK(japaric): with cfg(test) the inherent `[T]::into_vec` method, which is

src/libcore/macros.rs

@@ -6,13 +6,13 @@
 #[stable(feature = "core", since = "1.6.0")]
 macro_rules! panic {
     () => (
-        panic!("explicit panic")
+        $crate::panic!("explicit panic")
     );
     ($msg:expr) => ({
         $crate::panicking::panic(&($msg, file!(), line!(), __rust_unstable_column!()))
     });
     ($msg:expr,) => (
-        panic!($msg)
+        $crate::panic!($msg)
     );
     ($fmt:expr, $($arg:tt)+) => ({
         $crate::panicking::panic_fmt(format_args!($fmt, $($arg)*),
@@ -58,7 +58,7 @@ macro_rules! assert_eq {
         }
     });
     ($left:expr, $right:expr,) => ({
-        assert_eq!($left, $right)
+        $crate::assert_eq!($left, $right)
     });
     ($left:expr, $right:expr, $($arg:tt)+) => ({
         match (&($left), &($right)) {
@@ -115,7 +115,7 @@ macro_rules! assert_ne {
         }
     });
     ($left:expr, $right:expr,) => {
-        assert_ne!($left, $right)
+        $crate::assert_ne!($left, $right)
     };
     ($left:expr, $right:expr, $($arg:tt)+) => ({
         match (&($left), &($right)) {
@@ -208,7 +208,7 @@ macro_rules! debug_assert {
 #[macro_export]
 #[stable(feature = "rust1", since = "1.0.0")]
 macro_rules! debug_assert_eq {
-    ($($arg:tt)*) => (if cfg!(debug_assertions) { assert_eq!($($arg)*); })
+    ($($arg:tt)*) => (if cfg!(debug_assertions) { $crate::assert_eq!($($arg)*); })
 }
 
 /// Asserts that two expressions are not equal to each other.
@@ -235,7 +235,7 @@ macro_rules! debug_assert_eq {
 #[macro_export]
 #[stable(feature = "assert_ne", since = "1.13.0")]
 macro_rules! debug_assert_ne {
-    ($($arg:tt)*) => (if cfg!(debug_assertions) { assert_ne!($($arg)*); })
+    ($($arg:tt)*) => (if cfg!(debug_assertions) { $crate::assert_ne!($($arg)*); })
 }
 
 /// Unwraps a result or propagates its error.
@@ -310,7 +310,7 @@ macro_rules! r#try {
             return $crate::result::Result::Err($crate::convert::From::from(err))
         }
     });
-    ($expr:expr,) => (r#try!($expr));
+    ($expr:expr,) => ($crate::r#try!($expr));
 }
 
 /// Writes formatted data into a buffer.
@@ -425,10 +425,10 @@ macro_rules! write {
 #[allow_internal_unstable(format_args_nl)]
 macro_rules! writeln {
     ($dst:expr) => (
-        write!($dst, "\n")
+        $crate::write!($dst, "\n")
     );
     ($dst:expr,) => (
-        writeln!($dst)
+        $crate::writeln!($dst)
     );
     ($dst:expr, $($arg:tt)*) => (
         $dst.write_fmt(format_args_nl!($($arg)*))
@@ -494,10 +494,10 @@ macro_rules! unreachable {
         panic!("internal error: entered unreachable code")
     });
     ($msg:expr) => ({
-        unreachable!("{}", $msg)
+        $crate::unreachable!("{}", $msg)
     });
     ($msg:expr,) => ({
-        unreachable!($msg)
+        $crate::unreachable!($msg)
     });
     ($fmt:expr, $($arg:tt)*) => ({
         panic!(concat!("internal error: entered unreachable code: ", $fmt), $($arg)*)

src/libcore/option.rs

@@ -725,8 +725,6 @@ impl<T> Option<T> {
     /// # Examples
     ///
     /// ```
-    /// #![feature(option_xor)]
-    ///
     /// let x = Some(2);
     /// let y: Option<u32> = None;
     /// assert_eq!(x.xor(y), Some(2));
@@ -744,7 +742,7 @@ impl<T> Option<T> {
     /// assert_eq!(x.xor(y), None);
     /// ```
     #[inline]
-    #[unstable(feature = "option_xor", issue = "50512")]
+    #[stable(feature = "option_xor", since = "1.37.0")]
     pub fn xor(self, optb: Option<T>) -> Option<T> {
         match (self, optb) {
             (Some(a), None) => Some(a),

src/libcore/slice/mod.rs

@@ -2146,14 +2146,13 @@ impl<T> [T] {
     /// Copying four bytes within a slice:
     ///
     /// ```
-    /// # #![feature(copy_within)]
     /// let mut bytes = *b"Hello, World!";
     ///
     /// bytes.copy_within(1..5, 8);
     ///
     /// assert_eq!(&bytes, b"Hello, Wello!");
     /// ```
-    #[unstable(feature = "copy_within", issue = "54236")]
+    #[stable(feature = "copy_within", since = "1.37.0")]
     pub fn copy_within<R: ops::RangeBounds<usize>>(&mut self, src: R, dest: usize)
     where
         T: Copy,
@@ -2178,8 +2177,8 @@ impl<T> [T] {
         assert!(dest <= self.len() - count, "dest is out of bounds");
         unsafe {
             ptr::copy(
-                self.get_unchecked(src_start),
-                self.get_unchecked_mut(dest),
+                self.as_ptr().add(src_start),
+                self.as_mut_ptr().add(dest),
                 count,
             );
         }

src/libcore/tests/lib.rs

@@ -28,7 +28,6 @@
 #![feature(inner_deref)]
 #![feature(slice_internals)]
 #![feature(slice_partition_dedup)]
-#![feature(copy_within)]
 #![feature(int_error_matching)]
 #![feature(const_fn)]
 #![warn(rust_2018_idioms)]

src/libcore/tests/slice.rs

@@ -1512,6 +1512,13 @@ fn test_copy_within() {
     let mut bytes = *b"Hello, World!";
     bytes.copy_within(.., 0);
     assert_eq!(&bytes, b"Hello, World!");
+
+    // Ensure that copying at the end of slice won't cause UB.
+    let mut bytes = *b"Hello, World!";
+    bytes.copy_within(13..13, 5);
+    assert_eq!(&bytes, b"Hello, World!");
+    bytes.copy_within(5..5, 13);
+    assert_eq!(&bytes, b"Hello, World!");
 }
 
 #[test]
@@ -1536,6 +1543,13 @@ fn test_copy_within_panics_src_inverted() {
     // 2 is greater than 1, so this range is invalid.
     bytes.copy_within(2..1, 0);
 }
+#[test]
+#[should_panic(expected = "attempted to index slice up to maximum usize")]
+fn test_copy_within_panics_src_out_of_bounds() {
+    let mut bytes = *b"Hello, World!";
+    // an inclusive range ending at usize::max_value() would make src_end overflow
+    bytes.copy_within(usize::max_value()..=usize::max_value(), 0);
+}
 
 #[test]
 fn test_is_sorted() {

src/librustc/error_codes.rs

@@ -1883,7 +1883,7 @@ This pattern should be rewritten. There are a few possible ways to do this:
     # }
     ```
 
-The same applies to transmutes to `*mut fn()`, which were observedin practice.
+The same applies to transmutes to `*mut fn()`, which were observed in practice.
 Note though that use of this type is generally incorrect.
 The intention is typically to describe a function pointer, but just `fn()`
 alone suffices for that. `*mut fn()` is a pointer to a fn pointer.

src/librustc_target/spec/mod.rs

@@ -268,16 +268,16 @@ pub type LinkArgs = BTreeMap<LinkerFlavor, Vec<String>>;
 pub type TargetResult = Result<Target, String>;
 
 macro_rules! supported_targets {
-    ( $(($triple:expr, $module:ident),)+ ) => (
-        $(mod $module;)*
+    ( $(($( $triple:literal, )+ $module:ident ),)+ ) => {
+        $(mod $module;)+
 
         /// List of supported targets
-        const TARGETS: &[&str] = &[$($triple),*];
+        const TARGETS: &[&str] = &[$($($triple),+),+];
 
         fn load_specific(target: &str) -> Result<Target, LoadTargetError> {
             match target {
                 $(
-                    $triple => {
+                    $($triple)|+ => {
                         let mut t = $module::target()
                             .map_err(LoadTargetError::Other)?;
                         t.options.is_builtin = true;
@@ -307,7 +307,7 @@ macro_rules! supported_targets {
         mod test_json_encode_decode {
             use serialize::json::ToJson;
             use super::Target;
-            $(use super::$module;)*
+            $(use super::$module;)+
 
             $(
                 #[test]
@@ -322,9 +322,9 @@ macro_rules! supported_targets {
                         assert_eq!(original, parsed);
                     });
                 }
-            )*
+            )+
         }
-    )
+    };
 }
 
 supported_targets! {
@@ -426,7 +426,9 @@ supported_targets! {
     ("armv7r-none-eabi", armv7r_none_eabi),
     ("armv7r-none-eabihf", armv7r_none_eabihf),
 
-    ("x86_64-sun-solaris", x86_64_sun_solaris),
+    // `x86_64-pc-solaris` is an alias for `x86_64_sun_solaris` for backwards compatibility reasons.
+    // (See <https://github.com/rust-lang/rust/issues/40531>.)
+    ("x86_64-sun-solaris", "x86_64-pc-solaris", x86_64_sun_solaris),
     ("sparcv9-sun-solaris", sparcv9_sun_solaris),
 
     ("x86_64-pc-windows-gnu", x86_64_pc_windows_gnu),

src/librustc_target/spec/riscv32imac_unknown_none_elf.rs

@@ -25,6 +25,7 @@ pub fn target() -> TargetResult {
             relocation_model: "static".to_string(),
             emit_debug_gdb_scripts: false,
             abi_blacklist: super::riscv_base::abi_blacklist(),
+            eliminate_frame_pointer: false,
             .. Default::default()
         },
     })

src/librustc_target/spec/riscv32imc_unknown_none_elf.rs

@@ -26,6 +26,7 @@ pub fn target() -> TargetResult {
             relocation_model: "static".to_string(),
             emit_debug_gdb_scripts: false,
             abi_blacklist: super::riscv_base::abi_blacklist(),
+            eliminate_frame_pointer: false,
             .. Default::default()
         },
     })

src/librustc_target/spec/riscv64gc_unknown_none_elf.rs

@@ -25,6 +25,7 @@ pub fn target() -> TargetResult {
             relocation_model: "static".to_string(),
             emit_debug_gdb_scripts: false,
             abi_blacklist: super::riscv_base::abi_blacklist(),
+            eliminate_frame_pointer: false,
             .. Default::default()
         },
     })

src/librustc_target/spec/riscv64imac_unknown_none_elf.rs

@@ -25,6 +25,7 @@ pub fn target() -> TargetResult {
             relocation_model: "static".to_string(),
             emit_debug_gdb_scripts: false,
             abi_blacklist: super::riscv_base::abi_blacklist(),
+            eliminate_frame_pointer: false,
             .. Default::default()
         },
     })

src/libstd/macros.rs

@@ -56,13 +56,13 @@
 #[allow_internal_unstable(__rust_unstable_column, libstd_sys_internals)]
 macro_rules! panic {
     () => ({
-        panic!("explicit panic")
+        $crate::panic!("explicit panic")
     });
     ($msg:expr) => ({
         $crate::rt::begin_panic($msg, &(file!(), line!(), __rust_unstable_column!()))
     });
     ($msg:expr,) => ({
-        panic!($msg)
+        $crate::panic!($msg)
     });
     ($fmt:expr, $($arg:tt)+) => ({
         $crate::rt::begin_panic_fmt(&format_args!($fmt, $($arg)+),
@@ -145,7 +145,7 @@ macro_rules! print {
 #[stable(feature = "rust1", since = "1.0.0")]
 #[allow_internal_unstable(print_internals, format_args_nl)]
 macro_rules! println {
-    () => (print!("\n"));
+    () => ($crate::print!("\n"));
     ($($arg:tt)*) => ({
         $crate::io::_print(format_args_nl!($($arg)*));
     })
@@ -204,7 +204,7 @@ macro_rules! eprint {
 #[stable(feature = "eprint", since = "1.19.0")]
 #[allow_internal_unstable(print_internals, format_args_nl)]
 macro_rules! eprintln {
-    () => (eprint!("\n"));
+    () => ($crate::eprint!("\n"));
     ($($arg:tt)*) => ({
         $crate::io::_eprint(format_args_nl!($($arg)*));
     })
@@ -337,23 +337,23 @@ macro_rules! eprintln {
 #[stable(feature = "dbg_macro", since = "1.32.0")]
 macro_rules! dbg {
     () => {
-        eprintln!("[{}:{}]", file!(), line!());
+        $crate::eprintln!("[{}:{}]", file!(), line!());
     };
     ($val:expr) => {
         // Use of `match` here is intentional because it affects the lifetimes
         // of temporaries - https://stackoverflow.com/a/48732525/1063961
         match $val {
             tmp => {
-                eprintln!("[{}:{}] {} = {:#?}",
+                $crate::eprintln!("[{}:{}] {} = {:#?}",
                     file!(), line!(), stringify!($val), &tmp);
                 tmp
             }
         }
     };
     // Trailing comma with single argument is ignored
-    ($val:expr,) => { dbg!($val) };
+    ($val:expr,) => { $crate::dbg!($val) };
     ($($val:expr),+ $(,)?) => {
-        ($(dbg!($val)),+,)
+        ($($crate::dbg!($val)),+,)
     };
 }
 

src/test/ui/explain.stdout

@@ -53,7 +53,7 @@ This pattern should be rewritten. There are a few possible ways to do this:
     let f: extern "C" fn(*mut i32) = transmute(foo as usize); // works too
     ```
 
-The same applies to transmutes to `*mut fn()`, which were observedin practice.
+The same applies to transmutes to `*mut fn()`, which were observed in practice.
 Note though that use of this type is generally incorrect.
 The intention is typically to describe a function pointer, but just `fn()`
 alone suffices for that. `*mut fn()` is a pointer to a fn pointer.

src/test/ui/hygiene/no_implicit_prelude.rs

@@ -13,7 +13,7 @@ mod bar {
     }
     fn f() {
         ::foo::m!();
-        println!(); //~ ERROR cannot find macro `print!` in this scope
+        assert_eq!(0, 0); //~ ERROR cannot find macro `panic!` in this scope
     }
 }
 

src/test/ui/hygiene/no_implicit_prelude.stderr

@@ -7,11 +7,11 @@ LL |     fn f() { ::bar::m!(); }
 LL |         Vec::new();
    |         ^^^ use of undeclared type or module `Vec`
 
-error: cannot find macro `print!` in this scope
+error: cannot find macro `panic!` in this scope
   --> $DIR/no_implicit_prelude.rs:16:9
    |
-LL |         println!();
-   |         ^^^^^^^^^^^
+LL |         assert_eq!(0, 0);
+   |         ^^^^^^^^^^^^^^^^^
    |
    = help: have you added the `#[macro_use]` on the module/import?
    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)