Auto merge of #40995 - alexcrichton:beta-next, r=alexcrichton

Backport PRs to beta

Backport of

* #40967
* #40836
* #40779
* #40888

Also includes a cargo submodule update

.travis.yml

@@ -40,7 +40,10 @@ matrix:
     - env: IMAGE=x86_64-gnu-distcheck
     - env: IMAGE=x86_64-gnu-incremental
 
-    # OSX builders
+    # OSX builders running tests, these run the full test suite.
+    #
+    # Note that the compiler is compiled to target 10.8 here because the Xcode
+    # version that we're using, 8.2, cannot compile LLVM for OSX 10.7.
     - env: >
         RUST_CHECK_TARGET=check
         RUST_CONFIGURE_ARGS=--build=x86_64-apple-darwin
@@ -68,6 +71,12 @@ matrix:
       osx_image: xcode8.2
       install: *osx_install_sccache
 
+    # OSX builders producing releases. These do not run the full test suite and
+    # just produce a bunch of artifacts.
+    #
+    # Note that these are running in the `xcode7` image instead of the
+    # `xcode8.2` image as above. That's because we want to build releases for
+    # OSX 10.7 and `xcode7` is the latest Xcode able to compile LLVM for 10.7.
     - env: >
         RUST_CHECK_TARGET=dist
         RUST_CONFIGURE_ARGS="--build=i686-apple-darwin --enable-extended"
@@ -76,10 +85,9 @@ matrix:
         RUSTC_RETRY_LINKER_ON_SEGFAULT=1
         SCCACHE_ERROR_LOG=/tmp/sccache.log
         RUST_LOG=sccache=debug
-        MACOSX_DEPLOYMENT_TARGET=10.8
-        MACOSX_STD_DEPLOYMENT_TARGET=10.7
+        MACOSX_DEPLOYMENT_TARGET=10.7
       os: osx
-      osx_image: xcode8.2
+      osx_image: xcode7
       install: >
         travis_retry curl -o /usr/local/bin/sccache https://s3.amazonaws.com/rust-lang-ci/rust-ci-mirror/2017-02-25-sccache-x86_64-apple-darwin &&
           chmod +x /usr/local/bin/sccache
@@ -91,10 +99,9 @@ matrix:
         RUSTC_RETRY_LINKER_ON_SEGFAULT=1
         SCCACHE_ERROR_LOG=/tmp/sccache.log
         RUST_LOG=sccache=debug
-        MACOSX_DEPLOYMENT_TARGET=10.8
-        MACOSX_STD_DEPLOYMENT_TARGET=10.7
+        MACOSX_DEPLOYMENT_TARGET=10.7
       os: osx
-      osx_image: xcode8.2
+      osx_image: xcode7
       install: *osx_install_sccache
 
     # "alternate" deployments, these are "nightlies" but don't have assertions
@@ -110,10 +117,9 @@ matrix:
         RUSTC_RETRY_LINKER_ON_SEGFAULT=1
         SCCACHE_ERROR_LOG=/tmp/sccache.log
         RUST_LOG=sccache=debug
-        MACOSX_DEPLOYMENT_TARGET=10.8
-        MACOSX_STD_DEPLOYMENT_TARGET=10.7
+        MACOSX_DEPLOYMENT_TARGET=10.7
       os: osx
-      osx_image: xcode8.2
+      osx_image: xcode7
       install: *osx_install_sccache
 
 env:

src/librustc/infer/error_reporting/mod.rs

@@ -426,30 +426,26 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
     {
         debug!("note_issue_32330: terr={:?}", terr);
         match *terr {
-            TypeError::RegionsInsufficientlyPolymorphic(_, &Region::ReVar(vid)) |
-            TypeError::RegionsOverlyPolymorphic(_, &Region::ReVar(vid)) => {
-                match self.region_vars.var_origin(vid) {
-                    RegionVariableOrigin::EarlyBoundRegion(_, _, Some(Issue32330 {
-                        fn_def_id,
-                        region_name
-                    })) => {
-                        diag.note(
-                            &format!("lifetime parameter `{0}` declared on fn `{1}` \
-                                      appears only in the return type, \
-                                      but here is required to be higher-ranked, \
-                                      which means that `{0}` must appear in both \
-                                      argument and return types",
-                                     region_name,
-                                     self.tcx.item_path_str(fn_def_id)));
-                        diag.note(
-                            &format!("this error is the result of a recent bug fix; \
-                                      for more information, see issue #33685 \
-                                      <https://github.com/rust-lang/rust/issues/33685>"));
-                    }
-                    _ => { }
-                }
+            TypeError::RegionsInsufficientlyPolymorphic(_, _, Some(box Issue32330 {
+                fn_def_id, region_name
+            })) |
+            TypeError::RegionsOverlyPolymorphic(_, _, Some(box Issue32330 {
+                fn_def_id, region_name
+            })) => {
+                diag.note(
+                    &format!("lifetime parameter `{0}` declared on fn `{1}` \
+                              appears only in the return type, \
+                              but here is required to be higher-ranked, \
+                              which means that `{0}` must appear in both \
+                              argument and return types",
+                             region_name,
+                             self.tcx.item_path_str(fn_def_id)));
+                diag.note(
+                    &format!("this error is the result of a recent bug fix; \
+                              for more information, see issue #33685 \
+                              <https://github.com/rust-lang/rust/issues/33685>"));
             }
-            _ => { }
+            _ => {}
         }
     }
 

src/librustc/infer/higher_ranked/mod.rs

@@ -15,6 +15,7 @@ use super::{CombinedSnapshot,
             InferCtxt,
             LateBoundRegion,
             HigherRankedType,
+            RegionVariableOrigin,
             SubregionOrigin,
             SkolemizationMap};
 use super::combine::CombineFields;
@@ -656,14 +657,27 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
                        skol_br,
                        tainted_region);
 
+                let issue_32330 = if let &ty::ReVar(vid) = tainted_region {
+                    match self.region_vars.var_origin(vid) {
+                        RegionVariableOrigin::EarlyBoundRegion(_, _, issue_32330) => {
+                            issue_32330.map(Box::new)
+                        }
+                        _ => None
+                    }
+                } else {
+                    None
+                };
+
                 if overly_polymorphic {
                     debug!("Overly polymorphic!");
                     return Err(TypeError::RegionsOverlyPolymorphic(skol_br,
-                                                                   tainted_region));
+                                                                   tainted_region,
+                                                                   issue_32330));
                 } else {
                     debug!("Not as polymorphic!");
                     return Err(TypeError::RegionsInsufficientlyPolymorphic(skol_br,
-                                                                           tainted_region));
+                                                                           tainted_region,
+                                                                           issue_32330));
                 }
             }
         }

src/librustc/ty/error.rs

@@ -39,8 +39,8 @@ pub enum TypeError<'tcx> {
     RegionsDoesNotOutlive(&'tcx Region, &'tcx Region),
     RegionsNotSame(&'tcx Region, &'tcx Region),
     RegionsNoOverlap(&'tcx Region, &'tcx Region),
-    RegionsInsufficientlyPolymorphic(BoundRegion, &'tcx Region),
-    RegionsOverlyPolymorphic(BoundRegion, &'tcx Region),
+    RegionsInsufficientlyPolymorphic(BoundRegion, &'tcx Region, Option<Box<ty::Issue32330>>),
+    RegionsOverlyPolymorphic(BoundRegion, &'tcx Region, Option<Box<ty::Issue32330>>),
     Sorts(ExpectedFound<Ty<'tcx>>),
     IntMismatch(ExpectedFound<ty::IntVarValue>),
     FloatMismatch(ExpectedFound<ast::FloatTy>),
@@ -116,11 +116,11 @@ impl<'tcx> fmt::Display for TypeError<'tcx> {
             RegionsNoOverlap(..) => {
                 write!(f, "lifetimes do not intersect")
             }
-            RegionsInsufficientlyPolymorphic(br, _) => {
+            RegionsInsufficientlyPolymorphic(br, _, _) => {
                 write!(f, "expected bound lifetime parameter {}, \
                            found concrete lifetime", br)
             }
-            RegionsOverlyPolymorphic(br, _) => {
+            RegionsOverlyPolymorphic(br, _, _) => {
                 write!(f, "expected concrete lifetime, \
                            found bound lifetime parameter {}", br)
             }
@@ -253,15 +253,15 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
                 self.note_and_explain_region(db, "...does not overlap ",
                                            region2, "");
             }
-            RegionsInsufficientlyPolymorphic(_, conc_region) => {
+            RegionsInsufficientlyPolymorphic(_, conc_region, _) => {
                 self.note_and_explain_region(db, "concrete lifetime that was found is ",
                                            conc_region, "");
             }
-            RegionsOverlyPolymorphic(_, &ty::ReVar(_)) => {
+            RegionsOverlyPolymorphic(_, &ty::ReVar(_), _) => {
                 // don't bother to print out the message below for
                 // inference variables, it's not very illuminating.
             }
-            RegionsOverlyPolymorphic(_, conc_region) => {
+            RegionsOverlyPolymorphic(_, conc_region, _) => {
                 self.note_and_explain_region(db, "expected concrete lifetime is ",
                                            conc_region, "");
             }

src/librustc/ty/structural_impls.rs

@@ -293,11 +293,13 @@ impl<'a, 'tcx> Lift<'tcx> for ty::error::TypeError<'a> {
             RegionsNoOverlap(a, b) => {
                 return tcx.lift(&(a, b)).map(|(a, b)| RegionsNoOverlap(a, b))
             }
-            RegionsInsufficientlyPolymorphic(a, b) => {
-                return tcx.lift(&b).map(|b| RegionsInsufficientlyPolymorphic(a, b))
+            RegionsInsufficientlyPolymorphic(a, b, ref c) => {
+                let c = c.clone();
+                return tcx.lift(&b).map(|b| RegionsInsufficientlyPolymorphic(a, b, c))
             }
-            RegionsOverlyPolymorphic(a, b) => {
-                return tcx.lift(&b).map(|b| RegionsOverlyPolymorphic(a, b))
+            RegionsOverlyPolymorphic(a, b, ref c) => {
+                let c = c.clone();
+                return tcx.lift(&b).map(|b| RegionsOverlyPolymorphic(a, b, c))
             }
             IntMismatch(x) => IntMismatch(x),
             FloatMismatch(x) => FloatMismatch(x),

src/librustdoc/html/layout.rs

@@ -54,7 +54,7 @@ r##"<!DOCTYPE html>
     {favicon}
     {in_header}
 </head>
-<body class="rustdoc">
+<body class="rustdoc {css_class}">
     <!--[if lte IE 8]>
     <div class="warning">
         This old browser is unsupported and will most likely display funky
@@ -80,7 +80,7 @@ r##"<!DOCTYPE html>
         </form>
     </nav>
 
-    <section id='main' class="content {css_class}">{content}</section>
+    <section id='main' class="content">{content}</section>
     <section id='search' class="content hidden"></section>
 
     <section class="footer"></section>

src/librustdoc/html/static/rustdoc.css

@@ -141,15 +141,15 @@ pre {
 	padding: 14px;
 }
 
-.source pre {
+.source .content pre {
 	padding: 20px;
 }
 
 img {
 	max-width: 100%;
 }
 
-.content.source {
+.source .content {
 	margin-top: 50px;
 	max-width: none;
 	overflow: visible;
@@ -231,7 +231,7 @@ nav.sub {
 	padding: 15px 0;
 }
 
-.content.source pre.rust {
+.source .content pre.rust {
 	white-space: pre;
 	overflow: auto;
 	padding-left: 0;

src/librustdoc/html/static/styles/main.css

@@ -53,6 +53,10 @@ pre {
     background-color: #fff;
 }
 
+.source .sidebar {
+	background-color: #fff;
+}
+
 .sidebar .location {
 	border-color: #000;
 	background-color: #fff;
@@ -187,4 +191,4 @@ a.test-arrow:hover{
 
 :target > code {
 	background: #FDFFD3;
-}
+}

src/rustllvm/llvm-rebuild-trigger

@@ -1,4 +1,8 @@
 # If this file is modified, then llvm will be (optionally) cleaned and then rebuilt.
 # The actual contents of this file do not matter, but to trigger a change on the
 # build bots then the contents should be changed so git updates the mtime.
+<<<<<<< HEAD
 2017-03-04
+=======
+2017-03-23
+>>>>>>> bd52ff1... update LLVM with fix for PR32379

src/test/compile-fail/issue-40000.rs

@@ -0,0 +1,21 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![feature(closure_to_fn_coercion)]
+
+fn main() {
+    let bar: fn(&mut u32) = |_| {}; //~ ERROR mismatched types
+    //~| expected concrete lifetime, found bound lifetime parameter
+
+    fn foo(x: Box<Fn(&i32)>) {}
+    let bar = Box::new(|x: &i32| {}) as Box<Fn(_)>;
+    foo(bar); //~ ERROR mismatched types
+    //~| expected concrete lifetime, found bound lifetime parameter
+}

src/test/run-pass/auxiliary/llvm_pr32379.rs

@@ -0,0 +1,15 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+pub fn pr32379(mut data: u64, f1: bool, f2: bool) -> u64 {
+    if f1 { data &= !2; }
+    if f2 { data |= 2; }
+    data
+}

src/test/run-pass/llvm-pr32379.rs

@@ -0,0 +1,23 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// aux-build:llvm_pr32379.rs
+
+// LLVM PR #32379 (https://bugs.llvm.org/show_bug.cgi?id=32379), which
+// applies to upstream LLVM 3.9.1, is known to cause rustc itself to be
+// miscompiled on ARM (Rust issue #40593). Because cross builds don't test
+// our *compiler* on ARM, have a test for the miscompilation directly.
+
+extern crate llvm_pr32379;
+
+pub fn main() {
+    let val = llvm_pr32379::pr32379(2, false, false);
+    assert_eq!(val, 2);
+}