---

yaml
---
r: 212916
b: refs/heads/master
c: 4806210
h: refs/heads/master
v: v3

Author: bors

[refs]

@@ -1,5 +1,5 @@
 ---
-refs/heads/master: 1792ef6ae4f51a45b157c69c5e34e0b48770dd56
+refs/heads/master: 4806210db9148f008a317db5235bc0e5a5e3b48e
 refs/heads/snap-stage1: e33de59e47c5076a89eadeb38f4934f58a3618a6
 refs/heads/snap-stage3: ba0e1cd8147d452c356aacb29fb87568ca26f111
 refs/heads/try: 1864973ae17213c5a58c4dd3f9af6d1b6c7d2e05

trunk/src/doc/trpl/rust-inside-other-languages.md

@@ -66,10 +66,14 @@ threads = []
     5_000_000.times do
       count += 1
     end
+
+    count
   end
 end
 
-threads.each { |t| t.join }
+threads.each do |t|
+  puts "Thread finished with count=#{t.value}"
+end
 puts "done!"
 ```
 
@@ -103,50 +107,26 @@ use std::thread;
 fn process() {
     let handles: Vec<_> = (0..10).map(|_| {
         thread::spawn(|| {
-            let mut _x = 0;
+            let mut x = 0;
             for _ in (0..5_000_000) {
-                _x += 1
+                x += 1
             }
+	    x
         })
     }).collect();
 
     for h in handles {
-        h.join().ok().expect("Could not join a thread!");
+        println!("Thread finished with count={}",
+	    h.join().map_err(|_| "Could not join a thread!").unwrap());
     }
+    println!("done!");
 }
 ```
 
 Some of this should look familiar from previous examples. We spin up ten
 threads, collecting them into a `handles` vector. Inside of each thread, we
-loop five million times, and add one to `_x` each time. Why the underscore?
-Well, if we remove it and compile:
-
-```bash
-$ cargo build
-   Compiling embed v0.1.0 (file:///home/steve/src/embed)
-src/lib.rs:3:1: 16:2 warning: function is never used: `process`, #[warn(dead_code)] on by default
-src/lib.rs:3 fn process() {
-src/lib.rs:4     let handles: Vec<_> = (0..10).map(|_| {
-src/lib.rs:5         thread::spawn(|| {
-src/lib.rs:6             let mut x = 0;
-src/lib.rs:7             for _ in (0..5_000_000) {
-src/lib.rs:8                 x += 1
-             ...
-src/lib.rs:6:17: 6:22 warning: variable `x` is assigned to, but never used, #[warn(unused_variables)] on by default
-src/lib.rs:6             let mut x = 0;
-                             ^~~~~
-```
-
-That first warning is because we are building a library. If we had a test
-for this function, the warning would go away. But for now, it’s never
-called.
-
-The second is related to `x` versus `_x`. Because we never actually _do_
-anything with `x`, we get a warning about it. In our case, that’s perfectly
-okay, as we’re just trying to waste CPU cycles. Prefixing `x` with the
-underscore removes the warning.
-
-Finally, we join on each thread.
+loop five million times, and add one to `x` each time. Finally, we join on
+each thread.
 
 Right now, however, this is a Rust library, and it doesn’t expose anything
 that’s callable from C. If we tried to hook this up to another language right

trunk/src/doc/trpl/trait-objects.md

@@ -300,7 +300,3 @@ let y = TraitObject {
 // y.method();
 (y.vtable.method)(y.data);
 ```
-
-If `b` or `y` were owning trait objects (`Box<Foo>`), there would be a
-`(b.vtable.destructor)(b.data)` (respectively `y`) call when they went out of
-scope.

trunk/src/libcore/str/mod.rs

@@ -638,10 +638,10 @@ impl<'a, P: Pattern<'a>> SplitInternal<'a, P> {
 
 generate_pattern_iterators! {
     forward:
-        /// Created with the method `.split()`.
+        #[doc="Created with the method `.split()`."]
         struct Split;
     reverse:
-        /// Created with the method `.rsplit()`.
+        #[doc="Created with the method `.rsplit()`."]
         struct RSplit;
     stability:
         #[stable(feature = "rust1", since = "1.0.0")]
@@ -652,10 +652,10 @@ generate_pattern_iterators! {
 
 generate_pattern_iterators! {
     forward:
-        /// Created with the method `.split_terminator()`.
+        #[doc="Created with the method `.split_terminator()`."]
         struct SplitTerminator;
     reverse:
-        /// Created with the method `.rsplit_terminator()`.
+        #[doc="Created with the method `.rsplit_terminator()`."]
         struct RSplitTerminator;
     stability:
         #[stable(feature = "rust1", since = "1.0.0")]
@@ -698,10 +698,10 @@ impl<'a, P: Pattern<'a>> SplitNInternal<'a, P> {
 
 generate_pattern_iterators! {
     forward:
-        /// Created with the method `.splitn()`.
+        #[doc="Created with the method `.splitn()`."]
         struct SplitN;
     reverse:
-        /// Created with the method `.rsplitn()`.
+        #[doc="Created with the method `.rsplitn()`."]
         struct RSplitN;
     stability:
         #[stable(feature = "rust1", since = "1.0.0")]
@@ -732,10 +732,10 @@ impl<'a, P: Pattern<'a>> MatchIndicesInternal<'a, P> {
 
 generate_pattern_iterators! {
     forward:
-        /// Created with the method `.match_indices()`.
+        #[doc="Created with the method `.match_indices()`."]
         struct MatchIndices;
     reverse:
-        /// Created with the method `.rmatch_indices()`.
+        #[doc="Created with the method `.rmatch_indices()`."]
         struct RMatchIndices;
     stability:
         #[unstable(feature = "core",
@@ -773,10 +773,10 @@ impl<'a, P: Pattern<'a>> MatchesInternal<'a, P> {
 
 generate_pattern_iterators! {
     forward:
-        /// Created with the method `.matches()`.
+        #[doc="Created with the method `.matches()`."]
         struct Matches;
     reverse:
-        /// Created with the method `.rmatches()`.
+        #[doc="Created with the method `.rmatches()`."]
         struct RMatches;
     stability:
         #[unstable(feature = "core", reason = "type got recently added")]

trunk/src/liblibc/lib.rs

@@ -146,7 +146,10 @@ pub use funcs::bsd43::*;
 #[link(name = "m")]
 extern {}
 
-#[cfg(all(target_env = "musl", not(test)))]
+// When compiling rust with musl, statically include libc.a in liblibc.rlib.
+// A cargo build of the libc crate will therefore automatically pick up the
+// libc.a symbols because liblibc is transitively linked to by the stdlib.
+#[cfg(all(target_env = "musl", not(feature = "cargo-build"), not(test)))]
 #[link(name = "c", kind = "static")]
 extern {}
 

trunk/src/librustc/middle/traits/project.rs

@@ -389,15 +389,19 @@ fn opt_normalize_projection_type<'a,'b,'tcx>(
             }
         }
         Ok(ProjectedTy::NoProgress(projected_ty)) => {
+            debug!("normalize_projection_type: projected_ty={} no progress",
+                   projected_ty.repr(selcx.tcx()));
             Some(Normalized {
                 value: projected_ty,
                 obligations: vec!()
             })
         }
         Err(ProjectionTyError::TooManyCandidates) => {
+            debug!("normalize_projection_type: too many candidates");
             None
         }
         Err(ProjectionTyError::TraitSelectionError(_)) => {
+            debug!("normalize_projection_type: ERROR");
             // if we got an error processing the `T as Trait` part,
             // just return `ty::err` but add the obligation `T :
             // Trait`, which when processed will cause the error to be

trunk/src/librustc_back/sha2.rs

@@ -482,6 +482,7 @@ pub struct Sha256 {
 
 impl Sha256 {
     /// Construct a new instance of a SHA-256 digest.
+    /// Do not – under any circumstances – use this where timing attacks might be possible!
     pub fn new() -> Sha256 {
         Sha256 {
             engine: Engine256::new(&H256)

trunk/src/librustc_typeck/check/method/probe.rs

@@ -59,10 +59,12 @@ struct Candidate<'tcx> {
 }
 
 enum CandidateKind<'tcx> {
-    InherentImplCandidate(/* Impl */ ast::DefId, subst::Substs<'tcx>),
+    InherentImplCandidate(/* Impl */ ast::DefId, subst::Substs<'tcx>,
+                          /* Normalize obligations */ Vec<traits::PredicateObligation<'tcx>>),
     ObjectCandidate(/* Trait */ ast::DefId, /* method_num */ usize, /* vtable index */ usize),
     ExtensionImplCandidate(/* Impl */ ast::DefId, ty::TraitRef<'tcx>,
-                           subst::Substs<'tcx>, ItemIndex),
+                           subst::Substs<'tcx>, ItemIndex,
+                           /* Normalize obligations */ Vec<traits::PredicateObligation<'tcx>>),
     ClosureCandidate(/* Trait */ ast::DefId, ItemIndex),
     WhereClauseCandidate(ty::PolyTraitRef<'tcx>, ItemIndex),
     ProjectionCandidate(ast::DefId, ItemIndex),
@@ -398,16 +400,24 @@ impl<'a,'tcx> ProbeContext<'a,'tcx> {
         }
 
         let (impl_ty, impl_substs) = self.impl_ty_and_substs(impl_def_id);
-        let impl_ty = self.fcx.instantiate_type_scheme(self.span, &impl_substs, &impl_ty);
+        let impl_ty = impl_ty.subst(self.tcx(), &impl_substs);
 
         // Determine the receiver type that the method itself expects.
-        let xform_self_ty =
-            self.xform_self_ty(&item, impl_ty, &impl_substs);
+        let xform_self_ty = self.xform_self_ty(&item, impl_ty, &impl_substs);
+
+        // We can't use normalize_associated_types_in as it will pollute the
+        // fcx's fulfillment context after this probe is over.
+        let cause = traits::ObligationCause::misc(self.span, self.fcx.body_id);
+        let mut selcx = &mut traits::SelectionContext::new(self.fcx.infcx(), self.fcx);
+        let traits::Normalized { value: xform_self_ty, obligations } =
+            traits::normalize(selcx, cause, &xform_self_ty);
+        debug!("assemble_inherent_impl_probe: xform_self_ty = {:?}",
+               xform_self_ty.repr(self.tcx()));
 
         self.inherent_candidates.push(Candidate {
             xform_self_ty: xform_self_ty,
             item: item,
-            kind: InherentImplCandidate(impl_def_id, impl_substs)
+            kind: InherentImplCandidate(impl_def_id, impl_substs, obligations)
         });
     }
 
@@ -653,12 +663,24 @@ impl<'a,'tcx> ProbeContext<'a,'tcx> {
                                    impl_trait_ref.self_ty(),
                                    impl_trait_ref.substs);
 
+            // Normalize the receiver. We can't use normalize_associated_types_in
+            // as it will pollute the fcx's fulfillment context after this probe
+            // is over.
+            let cause = traits::ObligationCause::misc(self.span, self.fcx.body_id);
+            let mut selcx = &mut traits::SelectionContext::new(self.fcx.infcx(), self.fcx);
+            let traits::Normalized { value: xform_self_ty, obligations } =
+                traits::normalize(selcx, cause, &xform_self_ty);
+
             debug!("xform_self_ty={}", xform_self_ty.repr(self.tcx()));
 
             self.extension_candidates.push(Candidate {
                 xform_self_ty: xform_self_ty,
                 item: item.clone(),
-                kind: ExtensionImplCandidate(impl_def_id, impl_trait_ref, impl_substs, item_index)
+                kind: ExtensionImplCandidate(impl_def_id,
+                                             impl_trait_ref,
+                                             impl_substs,
+                                             item_index,
+                                             obligations)
             });
         });
     }
@@ -1026,8 +1048,8 @@ impl<'a,'tcx> ProbeContext<'a,'tcx> {
             // match as well (or at least may match, sometimes we
             // don't have enough information to fully evaluate).
             match probe.kind {
-                InherentImplCandidate(impl_def_id, ref substs) |
-                ExtensionImplCandidate(impl_def_id, _, ref substs, _) => {
+                InherentImplCandidate(impl_def_id, ref substs, ref ref_obligations) |
+                ExtensionImplCandidate(impl_def_id, _, ref substs, _, ref ref_obligations) => {
                     let selcx = &mut traits::SelectionContext::new(self.infcx(), self.fcx);
                     let cause = traits::ObligationCause::misc(self.span, self.fcx.body_id);
 
@@ -1046,8 +1068,10 @@ impl<'a,'tcx> ProbeContext<'a,'tcx> {
                     debug!("impl_obligations={}", obligations.repr(self.tcx()));
 
                     // Evaluate those obligations to see if they might possibly hold.
-                    obligations.iter().all(|o| selcx.evaluate_obligation(o)) &&
-                        norm_obligations.iter().all(|o| selcx.evaluate_obligation(o))
+                    obligations.iter()
+                        .chain(norm_obligations.iter()).chain(ref_obligations.iter())
+                        .all(|o| selcx.evaluate_obligation(o))
+
                 }
 
                 ProjectionCandidate(..) |
@@ -1281,13 +1305,13 @@ impl<'tcx> Candidate<'tcx> {
         Pick {
             item: self.item.clone(),
             kind: match self.kind {
-                InherentImplCandidate(def_id, _) => {
+                InherentImplCandidate(def_id, _, _) => {
                     InherentImplPick(def_id)
                 }
                 ObjectCandidate(def_id, item_num, real_index) => {
                     ObjectPick(def_id, item_num, real_index)
                 }
-                ExtensionImplCandidate(def_id, _, _, index) => {
+                ExtensionImplCandidate(def_id, _, _, index, _) => {
                     ExtensionImplPick(def_id, index)
                 }
                 ClosureCandidate(trait_def_id, index) => {
@@ -1315,9 +1339,9 @@ impl<'tcx> Candidate<'tcx> {
 
     fn to_source(&self) -> CandidateSource {
         match self.kind {
-            InherentImplCandidate(def_id, _) => ImplSource(def_id),
+            InherentImplCandidate(def_id, _, _) => ImplSource(def_id),
             ObjectCandidate(def_id, _, _) => TraitSource(def_id),
-            ExtensionImplCandidate(def_id, _, _, _) => ImplSource(def_id),
+            ExtensionImplCandidate(def_id, _, _, _, _) => ImplSource(def_id),
             ClosureCandidate(trait_def_id, _) => TraitSource(trait_def_id),
             WhereClauseCandidate(ref trait_ref, _) => TraitSource(trait_ref.def_id()),
             ProjectionCandidate(trait_def_id, _) => TraitSource(trait_def_id),
@@ -1335,7 +1359,7 @@ impl<'tcx> Candidate<'tcx> {
             ClosureCandidate(trait_def_id, item_num) => {
                 Some((trait_def_id, item_num))
             }
-            ExtensionImplCandidate(_, ref trait_ref, _, item_num) => {
+            ExtensionImplCandidate(_, ref trait_ref, _, item_num, _) => {
                 Some((trait_ref.def_id, item_num))
             }
             WhereClauseCandidate(ref trait_ref, item_num) => {
@@ -1359,13 +1383,14 @@ impl<'tcx> Repr<'tcx> for Candidate<'tcx> {
 impl<'tcx> Repr<'tcx> for CandidateKind<'tcx> {
     fn repr(&self, tcx: &ty::ctxt<'tcx>) -> String {
         match *self {
-            InherentImplCandidate(ref a, ref b) =>
-                format!("InherentImplCandidate({},{})", a.repr(tcx), b.repr(tcx)),
+            InherentImplCandidate(ref a, ref b, ref c) =>
+                format!("InherentImplCandidate({},{},{})", a.repr(tcx), b.repr(tcx),
+                        c.repr(tcx)),
             ObjectCandidate(a, b, c) =>
                 format!("ObjectCandidate({},{},{})", a.repr(tcx), b, c),
-            ExtensionImplCandidate(ref a, ref b, ref c, ref d) =>
-                format!("ExtensionImplCandidate({},{},{},{})", a.repr(tcx), b.repr(tcx),
-                        c.repr(tcx), d),
+            ExtensionImplCandidate(ref a, ref b, ref c, ref d, ref e) =>
+                format!("ExtensionImplCandidate({},{},{},{},{})", a.repr(tcx), b.repr(tcx),
+                        c.repr(tcx), d, e.repr(tcx)),
             ClosureCandidate(ref a, ref b) =>
                 format!("ClosureCandidate({},{})", a.repr(tcx), b),
             WhereClauseCandidate(ref a, ref b) =>

trunk/src/librustc_typeck/constrained_type_params.rs

@@ -19,10 +19,21 @@ pub enum Parameter {
     Region(ty::EarlyBoundRegion),
 }
 
+/// Returns the list of parameters that are constrained by the type `ty`
+/// - i.e. the value of each parameter in the list is uniquely determined
+/// by `ty` (see RFC 447).
 pub fn parameters_for_type<'tcx>(ty: Ty<'tcx>) -> Vec<Parameter> {
-    ty.walk()
-      .flat_map(|ty| parameters_for_type_shallow(ty))
-      .collect()
+    let mut result = vec![];
+    ty::maybe_walk_ty(ty, |t| {
+        if let ty::TyProjection(..) = t.sty {
+            false // projections are not injective.
+        } else {
+            result.append(&mut parameters_for_type_shallow(t));
+            // non-projection type constructors are injective.
+            true
+        }
+    });
+    result
 }
 
 pub fn parameters_for_trait_ref<'tcx>(trait_ref: &ty::TraitRef<'tcx>) -> Vec<Parameter> {

trunk/src/librustdoc/html/render.rs

@@ -456,13 +456,15 @@ fn build_index(krate: &clean::Crate, cache: &mut Cache) -> io::Result<String> {
             let did = ast_util::local_def(pid);
             match paths.get(&did) {
                 Some(&(ref fqp, _)) => {
+                    // Needed to determine `self` type.
+                    let parent_basename = Some(fqp[fqp.len() - 1].clone());
                     search_index.push(IndexItem {
                         ty: shortty(item),
                         name: item.name.clone().unwrap(),
                         path: fqp[..fqp.len() - 1].connect("::"),
                         desc: shorter(item.doc_value()),
                         parent: Some(did),
-                        search_type: None,
+                        search_type: get_index_search_type(&item, parent_basename),
                     });
                 },
                 None => {}