Rollup of 5 pull requests

src/librustc/ty/context.rs

@@ -1486,26 +1486,6 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
         self.queries.on_disk_cache.serialize(self.global_tcx(), encoder)
     }
 
-    /// This checks whether one is allowed to have pattern bindings
-    /// that bind-by-move on a match arm that has a guard, e.g.:
-    ///
-    /// ```rust
-    /// match foo { A(inner) if { /* something */ } => ..., ... }
-    /// ```
-    ///
-    /// It is separate from check_for_mutation_in_guard_via_ast_walk,
-    /// because that method has a narrower effect that can be toggled
-    /// off via a separate `-Z` flag, at least for the short term.
-    pub fn allow_bind_by_move_patterns_with_guards(self) -> bool {
-        self.features().bind_by_move_pattern_guards
-    }
-
-    /// If true, we should use a naive AST walk to determine if match
-    /// guard could perform bad mutations (or mutable-borrows).
-    pub fn check_for_mutation_in_guard_via_ast_walk(self) -> bool {
-        !self.allow_bind_by_move_patterns_with_guards()
-    }
-
     /// If true, we should use the AST-based borrowck (we may *also* use
     /// the MIR-based borrowck).
     pub fn use_ast_borrowck(self) -> bool {

src/librustc_mir/hair/pattern/check_match.rs

@@ -147,7 +147,7 @@ impl<'a, 'tcx> MatchVisitor<'a, 'tcx> {
             // Second, if there is a guard on each arm, make sure it isn't
             // assigning or borrowing anything mutably.
             if let Some(ref guard) = arm.guard {
-                if self.tcx.check_for_mutation_in_guard_via_ast_walk() {
+                if !self.tcx.features().bind_by_move_pattern_guards {
                     check_for_mutation_in_guard(self, &guard);
                 }
             }
@@ -562,7 +562,7 @@ fn check_legality_of_move_bindings(
                              "cannot bind by-move with sub-bindings")
                 .span_label(p.span, "binds an already bound by-move value by moving it")
                 .emit();
-        } else if has_guard && !cx.tcx.allow_bind_by_move_patterns_with_guards() {
+        } else if has_guard && !cx.tcx.features().bind_by_move_pattern_guards {
             let mut err = struct_span_err!(cx.tcx.sess, p.span, E0008,
                                            "cannot bind by-move into a pattern guard");
             err.span_label(p.span, "moves value into pattern guard");

src/librustc_passes/ast_validation.rs

@@ -20,7 +20,7 @@ use syntax::ptr::P;
 use syntax::visit::{self, Visitor};
 use syntax::{span_err, struct_span_err, walk_list};
 use syntax_ext::proc_macro_decls::is_proc_macro_attr;
-use syntax_pos::Span;
+use syntax_pos::{Span, MultiSpan};
 use errors::Applicability;
 use log::debug;
 
@@ -679,6 +679,14 @@ impl<'a> Visitor<'a> for AstValidator<'a> {
                                                 "unions cannot have zero fields");
                 }
             }
+            ItemKind::Existential(ref bounds, _) => {
+                if !bounds.iter()
+                          .any(|b| if let GenericBound::Trait(..) = *b { true } else { false }) {
+                    let msp = MultiSpan::from_spans(bounds.iter()
+                        .map(|bound| bound.span()).collect());
+                    self.err_handler().span_err(msp, "at least one trait must be specified");
+                }
+            }
             _ => {}
         }
 

src/librustdoc/html/render.rs

@@ -938,7 +938,7 @@ themePicker.onblur = handleThemeButtonsBlur;
           static_files::source_code_pro::REGULAR)?;
     write(cx.dst.join("SourceCodePro-Semibold.woff"),
           static_files::source_code_pro::SEMIBOLD)?;
-    write(cx.dst.join("SourceCodePro-LICENSE.md"),
+    write(cx.dst.join("SourceCodePro-LICENSE.txt"),
           static_files::source_code_pro::LICENSE)?;
     write(cx.dst.join("LICENSE-MIT.txt"),
           static_files::LICENSE_MIT)?;

src/librustdoc/html/static/SourceCodePro-LICENSE.md → src/librustdoc/html/static/SourceCodePro-LICENSE.txt

@@ -18,7 +18,7 @@ with others.
 
 The OFL allows the licensed fonts to be used, studied, modified and
 redistributed freely as long as they are not sold by themselves. The
-fonts, including any derivative works, can be bundled, embedded, 
+fonts, including any derivative works, can be bundled, embedded,
 redistributed and/or sold with any software provided that any reserved
 names are not used by derivative works. The fonts and derivatives,
 however, cannot be released under any other type of license. The

src/librustdoc/html/static_files.rs

@@ -103,7 +103,7 @@ pub mod source_code_pro {
     pub static SEMIBOLD: &'static [u8] = include_bytes!("static/SourceCodePro-Semibold.woff");
 
     /// The file `SourceCodePro-LICENSE.txt`, the license text of the Source Code Pro font.
-    pub static LICENSE: &'static [u8] = include_bytes!("static/SourceCodePro-LICENSE.md");
+    pub static LICENSE: &'static [u8] = include_bytes!("static/SourceCodePro-LICENSE.txt");
 }
 
 /// Files related to the sidebar in rustdoc sources.