Rollup of 9 pull requests

.travis.yml

@@ -165,6 +165,7 @@ script:
               stamp src/ci/docker/run.sh $IMAGE;
           fi
       fi
+  - sleep 300000
 
 after_success:
   - >

src/Cargo.toml

@@ -37,3 +37,4 @@ debug-assertions = false
 
 [replace]
 "https://github.com/rust-lang/cargo#0.20.0" = { path = "tools/cargo" }
+"gcc:0.3.49" = { git = "https://github.com/brson/gcc-rs", branch = "vs2017" }

src/bootstrap/Cargo.toml

@@ -36,5 +36,5 @@ num_cpus = "1.0"
 toml = "0.1"
 getopts = "0.2"
 rustc-serialize = "0.3"
-gcc = "0.3.46"
+gcc = "0.3.49"
 libc = "0.2"

src/bootstrap/dist.rs

@@ -914,6 +914,8 @@ pub fn extended(build: &Build, stage: u32, target: &str) {
         t!(fs::create_dir_all(pkg.join("cargo")));
         t!(fs::create_dir_all(pkg.join("rust-docs")));
         t!(fs::create_dir_all(pkg.join("rust-std")));
+        t!(fs::create_dir_all(pkg.join("rls")));
+        t!(fs::create_dir_all(pkg.join("rust-analysis")));
 
         cp_r(&work.join(&format!("{}-{}", pkgname(build, "rustc"), target)),
              &pkg.join("rustc"));
@@ -923,11 +925,17 @@ pub fn extended(build: &Build, stage: u32, target: &str) {
              &pkg.join("rust-docs"));
         cp_r(&work.join(&format!("{}-{}", pkgname(build, "rust-std"), target)),
              &pkg.join("rust-std"));
+        cp_r(&work.join(&format!("{}-{}", pkgname(build, "rls"), target)),
+             &pkg.join("rls"));
+        cp_r(&work.join(&format!("{}-{}", pkgname(build, "rust-analysis"), target)),
+             &pkg.join("rust-analysis"));
 
         install(&etc.join("pkg/postinstall"), &pkg.join("rustc"), 0o755);
         install(&etc.join("pkg/postinstall"), &pkg.join("cargo"), 0o755);
         install(&etc.join("pkg/postinstall"), &pkg.join("rust-docs"), 0o755);
         install(&etc.join("pkg/postinstall"), &pkg.join("rust-std"), 0o755);
+        install(&etc.join("pkg/postinstall"), &pkg.join("rls"), 0o755);
+        install(&etc.join("pkg/postinstall"), &pkg.join("rust-analysis"), 0o755);
 
         let pkgbuild = |component: &str| {
             let mut cmd = Command::new("pkgbuild");
@@ -941,6 +949,8 @@ pub fn extended(build: &Build, stage: u32, target: &str) {
         pkgbuild("cargo");
         pkgbuild("rust-docs");
         pkgbuild("rust-std");
+        pkgbuild("rls");
+        pkgbuild("rust-analysis");
 
         // create an 'uninstall' package
         install(&etc.join("pkg/postinstall"), &pkg.join("uninstall"), 0o755);
@@ -964,6 +974,8 @@ pub fn extended(build: &Build, stage: u32, target: &str) {
         let _ = fs::remove_dir_all(&exe);
         t!(fs::create_dir_all(exe.join("rustc")));
         t!(fs::create_dir_all(exe.join("cargo")));
+        t!(fs::create_dir_all(exe.join("rls")));
+        t!(fs::create_dir_all(exe.join("rust-analysis")));
         t!(fs::create_dir_all(exe.join("rust-docs")));
         t!(fs::create_dir_all(exe.join("rust-std")));
         cp_r(&work.join(&format!("{}-{}", pkgname(build, "rustc"), target))
@@ -978,11 +990,19 @@ pub fn extended(build: &Build, stage: u32, target: &str) {
         cp_r(&work.join(&format!("{}-{}", pkgname(build, "rust-std"), target))
                   .join(format!("rust-std-{}", target)),
              &exe.join("rust-std"));
+        cp_r(&work.join(&format!("{}-{}", pkgname(build, "rls"), target))
+                  .join("rls"),
+             &exe.join("rls"));
+        cp_r(&work.join(&format!("{}-{}", pkgname(build, "rust-analysis"), target))
+                  .join(format!("rust-analysis-{}", target)),
+             &exe.join("rust-analysis"));
 
         t!(fs::remove_file(exe.join("rustc/manifest.in")));
         t!(fs::remove_file(exe.join("cargo/manifest.in")));
         t!(fs::remove_file(exe.join("rust-docs/manifest.in")));
         t!(fs::remove_file(exe.join("rust-std/manifest.in")));
+        t!(fs::remove_file(exe.join("rls/manifest.in")));
+        t!(fs::remove_file(exe.join("rust-analysis/manifest.in")));
 
         if target.contains("windows-gnu") {
             t!(fs::create_dir_all(exe.join("rust-mingw")));
@@ -1056,6 +1076,26 @@ pub fn extended(build: &Build, stage: u32, target: &str) {
                         .arg("-dr").arg("Std")
                         .arg("-var").arg("var.StdDir")
                         .arg("-out").arg(exe.join("StdGroup.wxs")));
+        build.run(Command::new(&heat)
+                        .current_dir(&exe)
+                        .arg("dir")
+                        .arg("rls")
+                        .args(&heat_flags)
+                        .arg("-cg").arg("RlsGroup")
+                        .arg("-dr").arg("Rls")
+                        .arg("-var").arg("var.RlsDir")
+                        .arg("-out").arg(exe.join("RlsGroup.wxs"))
+                        .arg("-t").arg(etc.join("msi/remove-duplicates.xsl")));
+        build.run(Command::new(&heat)
+                        .current_dir(&exe)
+                        .arg("dir")
+                        .arg("rust-analysis")
+                        .args(&heat_flags)
+                        .arg("-cg").arg("AnalysisGroup")
+                        .arg("-dr").arg("Analysis")
+                        .arg("-var").arg("var.AnalysisDir")
+                        .arg("-out").arg(exe.join("AnalysisGroup.wxs"))
+                        .arg("-t").arg(etc.join("msi/remove-duplicates.xsl")));
         if target.contains("windows-gnu") {
             build.run(Command::new(&heat)
                             .current_dir(&exe)
@@ -1079,6 +1119,8 @@ pub fn extended(build: &Build, stage: u32, target: &str) {
                .arg("-dDocsDir=rust-docs")
                .arg("-dCargoDir=cargo")
                .arg("-dStdDir=rust-std")
+               .arg("-dRlsDir=rls")
+               .arg("-dAnalysisDir=rust-analysis")
                .arg("-arch").arg(&arch)
                .arg("-out").arg(&output)
                .arg(&input);
@@ -1096,6 +1138,8 @@ pub fn extended(build: &Build, stage: u32, target: &str) {
         candle("DocsGroup.wxs".as_ref());
         candle("CargoGroup.wxs".as_ref());
         candle("StdGroup.wxs".as_ref());
+        candle("RlsGroup.wxs".as_ref());
+        candle("AnalysisGroup.wxs".as_ref());
 
         if target.contains("windows-gnu") {
             candle("GccGroup.wxs".as_ref());
@@ -1118,6 +1162,8 @@ pub fn extended(build: &Build, stage: u32, target: &str) {
            .arg("DocsGroup.wixobj")
            .arg("CargoGroup.wixobj")
            .arg("StdGroup.wixobj")
+           .arg("RlsGroup.wixobj")
+           .arg("AnalysisGroup.wixobj")
            .current_dir(&exe);
 
         if target.contains("windows-gnu") {

src/doc/unstable-book/src/SUMMARY.md

@@ -208,6 +208,7 @@
     - [toowned_clone_into](library-features/toowned-clone-into.md)
     - [trusted_len](library-features/trusted-len.md)
     - [try_from](library-features/try-from.md)
+    - [try_trait](library-features/try-trait.md)
     - [unicode](library-features/unicode.md)
     - [unique](library-features/unique.md)
     - [unsize](library-features/unsize.md)

src/doc/unstable-book/src/library-features/question-mark-carrier.md

@@ -5,3 +5,9 @@ The tracking issue for this feature is: [#31436]
 [#31436]: https://github.com/rust-lang/rust/issues/31436
 
 ------------------------
+
+This feature has been superseded by [`try_trait`][try_trait].
+
+It exists only in stage0 for bootstrapping.
+
+[try_trait]: library-features/try-trait.html

src/doc/unstable-book/src/library-features/try-trait.md

@@ -0,0 +1,50 @@
+# `try_trait`
+
+The tracking issue for this feature is: [#42327]
+
+[#42327]: https://github.com/rust-lang/rust/issues/42327
+
+------------------------
+
+This introduces a new trait `Try` for extending the `?` operator to types
+other than `Result` (a part of [RFC 1859]).  The trait provides the canonical
+way to _view_ a type in terms of a success/failure dichotomy.  This will
+allow `?` to supplant the `try_opt!` macro on `Option` and the `try_ready!`
+macro on `Poll`, among other things.
+
+[RFC 1859]: https://github.com/rust-lang/rfcs/pull/1859
+
+Here's an example implementation of the trait:
+
+```rust,ignore
+/// A distinct type to represent the `None` value of an `Option`.
+///
+/// This enables using the `?` operator on `Option`; it's rarely useful alone.
+#[derive(Debug)]
+#[unstable(feature = "try_trait", issue = "42327")]
+pub struct None { _priv: () }
+
+#[unstable(feature = "try_trait", issue = "42327")]
+impl<T> ops::Try for Option<T>  {
+    type Ok = T;
+    type Error = None;
+
+    fn into_result(self) -> Result<T, None> {
+        self.ok_or(None { _priv: () })
+    }
+
+    fn from_ok(v: T) -> Self {
+        Some(v)
+    }
+
+    fn from_error(_: None) -> Self {
+        None
+    }
+}
+```
+
+Note the `Error` associated type here is a new marker.  The `?` operator
+allows interconversion between different `Try` implementers only when
+the error type can be converted `Into` the error type of the enclosing
+function (or catch block).  Having a distinct error type (as opposed to
+just `()`, or similar) restricts this to where it's semantically meaningful.

src/etc/installer/exe/rust.iss

@@ -46,6 +46,7 @@ Name: gcc; Description: "Linker and platform libraries"; Types: full
 Name: docs; Description: "HTML documentation"; Types: full
 Name: cargo; Description: "Cargo, the Rust package manager"; Types: full
 Name: std; Description: "The Rust Standard Library"; Types: full
+Name: rls; Description: "RLS, the Rust Language Server"
 
 [Files]
 Source: "rustc/*.*"; DestDir: "{app}"; Flags: ignoreversion recursesubdirs; Components: rust
@@ -55,6 +56,8 @@ Source: "rust-mingw/*.*"; DestDir: "{app}"; Flags: ignoreversion recursesubdirs;
 Source: "rust-docs/*.*"; DestDir: "{app}"; Flags: ignoreversion recursesubdirs; Components: docs
 Source: "cargo/*.*"; DestDir: "{app}"; Flags: ignoreversion recursesubdirs; Components: cargo
 Source: "rust-std/*.*"; DestDir: "{app}"; Flags: ignoreversion recursesubdirs; Components: std
+Source: "rls/*.*"; DestDir: "{app}"; Flags: ignoreversion recursesubdirs; Components: rls
+Source: "rust-analysis/*.*"; DestDir: "{app}"; Flags: ignoreversion recursesubdirs; Components: rls
 
 [Code]
 const