Auto merge of #44474 - GuillaumeGomez:rollup, r=GuillaumeGomez

Rollup of 13 pull requests

- Successful merges: #44262, #44329, #44332, #44347, #44372, #44384, #44387, #44396, #44449, #44451, #44457, #44464, #44467
- Failed merges:

Author: bors

src/liballoc/str.rs

@@ -297,6 +297,34 @@ impl str {
     /// [`str::from_utf8_mut`] function.
     ///
     /// [`str::from_utf8_mut`]: ./str/fn.from_utf8_mut.html
+    ///
+    /// # Examples
+    ///
+    /// Basic usage:
+    ///
+    /// ```
+    /// let mut s = String::from("Hello");
+    /// let bytes = unsafe { s.as_bytes_mut() };
+    ///
+    /// assert_eq!(b"Hello", bytes);
+    /// ```
+    ///
+    /// Mutability:
+    ///
+    /// ```
+    /// let mut s = String::from("🗻∈🌏");
+    ///
+    /// unsafe {
+    ///     let bytes = s.as_bytes_mut();
+    ///
+    ///     bytes[0] = 0xF0;
+    ///     bytes[1] = 0x9F;
+    ///     bytes[2] = 0x8D;
+    ///     bytes[3] = 0x94;
+    /// }
+    ///
+    /// assert_eq!("🍔∈🌏", s);
+    /// ```
     #[stable(feature = "str_mut_extras", since = "1.20.0")]
     #[inline(always)]
     pub unsafe fn as_bytes_mut(&mut self) -> &mut [u8] {
@@ -362,16 +390,25 @@ impl str {
     /// # Examples
     ///
     /// ```
-    /// let mut v = String::from("🗻∈🌏");
-    ///
-    /// assert_eq!(Some("🗻"), v.get_mut(0..4).map(|v| &*v));
-    ///
-    /// // indices not on UTF-8 sequence boundaries
-    /// assert!(v.get_mut(1..).is_none());
-    /// assert!(v.get_mut(..8).is_none());
+    /// use std::ascii::AsciiExt;
     ///
+    /// let mut v = String::from("hello");
+    /// // correct length
+    /// assert!(v.get_mut(0..5).is_some());
     /// // out of bounds
     /// assert!(v.get_mut(..42).is_none());
+    /// assert_eq!(Some("he"), v.get_mut(0..2).map(|v| &*v));
+    ///
+    /// assert_eq!("hello", v);
+    /// {
+    ///     let s = v.get_mut(0..2);
+    ///     let s = s.map(|s| {
+    ///         s.make_ascii_uppercase();
+    ///         &*s
+    ///     });
+    ///     assert_eq!(Some("HE"), s);
+    /// }
+    /// assert_eq!("HEllo", v);
     /// ```
     #[stable(feature = "str_checked_slicing", since = "1.20.0")]
     #[inline]

src/liballoc/string.rs

@@ -743,6 +743,16 @@ impl String {
     }
 
     /// Extracts a string slice containing the entire string.
+    ///
+    /// # Examples
+    ///
+    /// Basic usage:
+    ///
+    /// ```
+    /// let s = String::from("foo");
+    ///
+    /// assert_eq!("foo", s.as_str());
+    /// ```
     #[inline]
     #[stable(feature = "string_as_str", since = "1.7.0")]
     pub fn as_str(&self) -> &str {

src/liballoc_system/lib.rs

@@ -221,7 +221,7 @@ mod platform {
         }
     }
 
-    #[cfg(any(target_os = "android", target_os = "redox"))]
+    #[cfg(any(target_os = "android", target_os = "redox", target_os = "solaris"))]
     #[inline]
     unsafe fn aligned_malloc(layout: &Layout) -> *mut u8 {
         // On android we currently target API level 9 which unfortunately
@@ -244,7 +244,7 @@ mod platform {
         libc::memalign(layout.align(), layout.size()) as *mut u8
     }
 
-    #[cfg(not(any(target_os = "android", target_os = "redox")))]
+    #[cfg(not(any(target_os = "android", target_os = "redox", target_os = "solaris")))]
     #[inline]
     unsafe fn aligned_malloc(layout: &Layout) -> *mut u8 {
         let mut out = ptr::null_mut();

src/libcompiler_builtins

@@ -383,16 +383,16 @@ impl<'a, 'tcx> MirContext<'a, 'tcx> {
                         };
                         let msg_str = Symbol::intern(str).as_str();
                         let msg_str = C_str_slice(bcx.ccx, msg_str);
-                        let msg_file_line = C_struct(bcx.ccx,
-                                                     &[msg_str, filename, line],
+                        let msg_file_line_col = C_struct(bcx.ccx,
+                                                     &[msg_str, filename, line, col],
                                                      false);
-                        let align = llalign_of_min(bcx.ccx, common::val_ty(msg_file_line));
-                        let msg_file_line = consts::addr_of(bcx.ccx,
-                                                            msg_file_line,
-                                                            align,
-                                                            "panic_loc");
+                        let align = llalign_of_min(bcx.ccx, common::val_ty(msg_file_line_col));
+                        let msg_file_line_col = consts::addr_of(bcx.ccx,
+                                                                msg_file_line_col,
+                                                                align,
+                                                                "panic_loc");
                         (lang_items::PanicFnLangItem,
-                         vec![msg_file_line],
+                         vec![msg_file_line_col],
                          None)
                     }
                 };

src/librustc_trans/mir/block.rs

@@ -1554,9 +1554,12 @@ pub fn check_enum<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
 
     let repr_type_ty = def.repr.discr_type().to_ty(tcx);
     if repr_type_ty == tcx.types.i128 || repr_type_ty == tcx.types.u128 {
-        if !tcx.sess.features.borrow().i128_type {
+        if !tcx.sess.features.borrow().repr128 {
             emit_feature_err(&tcx.sess.parse_sess,
-                             "i128_type", sp, GateIssue::Language, "128-bit type is unstable");
+                             "repr128",
+                             sp,
+                             GateIssue::Language,
+                             "repr with 128-bit type is unstable");
         }
     }
 

src/librustc_typeck/check/mod.rs

@@ -606,12 +606,20 @@ pub fn run(mut krate: clean::Crate,
 }
 
 // A short, single-line view of `s`.
-fn concise_str(s: &str) -> String {
+fn concise_str(mut s: &str) -> String {
     if s.contains('\n') {
-        return format!("{}...", s.lines().next().expect("Impossible! We just found a newline"));
+        s = s.lines().next().expect("Impossible! We just found a newline");
     }
     if s.len() > 70 {
-        return format!("{} ... {}", &s[..50], &s[s.len()-20..]);
+        let mut lo = 50;
+        let mut hi = s.len() - 20;
+        while !s.is_char_boundary(lo) {
+            lo -= 1;
+        }
+        while !s.is_char_boundary(hi) {
+            hi += 1;
+        }
+        return format!("{} ... {}", &s[..lo], &s[hi..]);
     }
     s.to_owned()
 }
@@ -660,9 +668,13 @@ fn render_difference(diff: &html_diff::Difference) {
                      elem.path, elem.element_name, elem_attributes, opposite_elem_attributes);
         }
         html_diff::Difference::NodeText { ref elem, ref elem_text, ref opposite_elem_text, .. } => {
-            let (s1, s2) = concise_compared_strs(elem_text, opposite_elem_text);
-            println!("    {} Text differs:\n        expected: `{}`\n        found:    `{}`",
-                     elem.path, s1, s2);
+            if elem_text.split("\n")
+                        .zip(opposite_elem_text.split("\n"))
+                        .any(|(a, b)| a.trim() != b.trim()) {
+                let (s1, s2) = concise_compared_strs(elem_text, opposite_elem_text);
+                println!("    {} Text differs:\n        expected: `{}`\n        found:    `{}`",
+                         elem.path, s1, s2);
+            }
         }
         html_diff::Difference::NotPresent { ref elem, ref opposite_elem } => {
             if let Some(ref elem) = *elem {
@@ -1756,18 +1768,18 @@ fn render_markdown(w: &mut fmt::Formatter,
     // We only emit warnings if the user has opted-in to Pulldown rendering.
     let output = if render_type == RenderType::Pulldown {
         let pulldown_output = format!("{}", Markdown(md_text, RenderType::Pulldown));
-        let differences = html_diff::get_differences(&pulldown_output, &hoedown_output);
-        let differences = differences.into_iter()
-            .filter(|s| {
-                match *s {
-                    html_diff::Difference::NodeText { ref elem_text,
-                                                      ref opposite_elem_text,
-                                                      .. }
-                        if match_non_whitespace(elem_text, opposite_elem_text) => false,
-                    _ => true,
+        let mut differences = html_diff::get_differences(&pulldown_output, &hoedown_output);
+        differences.retain(|s| {
+            match *s {
+                html_diff::Difference::NodeText { ref elem_text,
+                                                  ref opposite_elem_text,
+                                                  .. }
+                    if elem_text.split_whitespace().eq(opposite_elem_text.split_whitespace()) => {
+                        false
                 }
-            })
-            .collect::<Vec<_>>();
+                _ => true,
+            }
+        });
 
         if !differences.is_empty() {
             scx.markdown_warnings.borrow_mut().push((span, md_text.to_owned(), differences));
@@ -1781,40 +1793,6 @@ fn render_markdown(w: &mut fmt::Formatter,
     write!(w, "<div class='docblock'>{}{}</div>", prefix, output)
 }
 
-// Returns true iff s1 and s2 match, ignoring whitespace.
-fn match_non_whitespace(s1: &str, s2: &str) -> bool {
-    let s1 = s1.trim();
-    let s2 = s2.trim();
-    let mut cs1 = s1.chars();
-    let mut cs2 = s2.chars();
-    while let Some(c1) = cs1.next() {
-        if c1.is_whitespace() {
-            continue;
-        }
-
-        loop {
-            if let Some(c2) = cs2.next() {
-                if !c2.is_whitespace() {
-                    if c1 != c2 {
-                        return false;
-                    }
-                    break;
-                }
-            } else {
-                return false;
-            }
-        }
-    }
-
-    while let Some(c2) = cs2.next() {
-        if !c2.is_whitespace() {
-            return false;
-        }
-    }
-
-    true
-}
-
 fn document_short(w: &mut fmt::Formatter, item: &clean::Item, link: AssocItemLink,
                   cx: &Context, prefix: &str) -> fmt::Result {
     if let Some(s) = item.doc_value() {
@@ -3791,35 +3769,3 @@ fn test_name_sorting() {
     sorted.sort_by_key(|&s| name_key(s));
     assert_eq!(names, sorted);
 }
-
-#[cfg(test)]
-#[test]
-fn test_match_non_whitespace() {
-    assert!(match_non_whitespace("", ""));
-    assert!(match_non_whitespace("  ", ""));
-    assert!(match_non_whitespace("", "  "));
-
-    assert!(match_non_whitespace("a", "a"));
-    assert!(match_non_whitespace(" a ", "a"));
-    assert!(match_non_whitespace("a", "  a"));
-    assert!(match_non_whitespace("abc", "abc"));
-    assert!(match_non_whitespace("abc", " abc "));
-    assert!(match_non_whitespace("abc  ", "abc"));
-    assert!(match_non_whitespace("abc xyz", "abc xyz"));
-    assert!(match_non_whitespace("abc xyz", "abc\nxyz"));
-    assert!(match_non_whitespace("abc xyz", "abcxyz"));
-    assert!(match_non_whitespace("abcxyz", "abc xyz"));
-    assert!(match_non_whitespace("abc    xyz ", " abc xyz\n"));
-
-    assert!(!match_non_whitespace("a", "b"));
-    assert!(!match_non_whitespace(" a ", "c"));
-    assert!(!match_non_whitespace("a", "  aa"));
-    assert!(!match_non_whitespace("abc", "ac"));
-    assert!(!match_non_whitespace("abc", " adc "));
-    assert!(!match_non_whitespace("abc  ", "abca"));
-    assert!(!match_non_whitespace("abc xyz", "abc xy"));
-    assert!(!match_non_whitespace("abc xyz", "bc\nxyz"));
-    assert!(!match_non_whitespace("abc xyz", "abc.xyz"));
-    assert!(!match_non_whitespace("abcxyz", "abc.xyz"));
-    assert!(!match_non_whitespace("abc    xyz ", " abc xyz w"));
-}

src/librustdoc/html/render.rs

@@ -22,7 +22,8 @@ pub fn resolve_symname<F>(frame: Frame,
 {
     unsafe {
         let mut info: Dl_info = intrinsics::init();
-        let symname = if dladdr(frame.exact_position, &mut info) == 0 {
+        let symname = if dladdr(frame.exact_position, &mut info) == 0 ||
+                         info.dli_sname.is_null() {
             None
         } else {
             CStr::from_ptr(info.dli_sname).to_str().ok()

src/libstd/sys/unix/backtrace/printing/dladdr.rs

@@ -31,6 +31,10 @@ use mem;
 /// within a thread, and values that implement [`Drop`] get destructed when a
 /// thread exits. Some caveats apply, which are explained below.
 ///
+/// A `LocalKey`'s initializer cannot recursively depend on itself, and using
+/// a `LocalKey` in this way will cause the initializer to infinitely recurse
+/// on the first call to `with`.
+///
 /// # Examples
 ///
 /// ```

src/libstd/thread/local.rs

@@ -312,6 +312,9 @@ declare_features! (
     // The `i128` type
     (active, i128_type, "1.16.0", Some(35118)),
 
+    // The `repr(i128)` annotation for enums
+    (active, repr128, "1.16.0", Some(35118)),
+
     // The `unadjusted` ABI. Perma unstable.
     (active, abi_unadjusted, "1.16.0", None),