Bump the bootstrap compiler

src/bootstrap/builder.rs

@@ -725,7 +725,7 @@ impl<'a> Builder<'a> {
             self.clear_if_dirty(&my_out, &rustdoc);
         }
 
-        cargo.env("CARGO_TARGET_DIR", &out_dir).arg(cmd).arg("-Zconfig-profile");
+        cargo.env("CARGO_TARGET_DIR", &out_dir).arg(cmd);
 
         let profile_var = |name: &str| {
             let profile = if self.config.rust_optimize { "RELEASE" } else { "DEV" };
@@ -847,13 +847,7 @@ impl<'a> Builder<'a> {
             rustflags.arg("-Zforce-unstable-if-unmarked");
         }
 
-        // cfg(bootstrap): the flag was renamed from `-Zexternal-macro-backtrace`
-        // to `-Zmacro-backtrace`, keep only the latter after beta promotion.
-        if stage == 0 {
-            rustflags.arg("-Zexternal-macro-backtrace");
-        } else {
-            rustflags.arg("-Zmacro-backtrace");
-        }
+        rustflags.arg("-Zmacro-backtrace");
 
         let want_rustdoc = self.doc_tests != DocTests::No;
 

src/bootstrap/channel.rs

@@ -13,7 +13,7 @@ use build_helper::output;
 use crate::Build;
 
 // The version number
-pub const CFG_RELEASE_NUM: &str = "1.43.0";
+pub const CFG_RELEASE_NUM: &str = "1.44.0";
 
 pub struct GitInfo {
     inner: Option<Info>,

src/liballoc/boxed.rs

@@ -1105,29 +1105,6 @@ impl<T: ?Sized> AsMut<T> for Box<T> {
 #[stable(feature = "pin", since = "1.33.0")]
 impl<T: ?Sized> Unpin for Box<T> {}
 
-#[cfg(bootstrap)]
-#[unstable(feature = "generator_trait", issue = "43122")]
-impl<G: ?Sized + Generator + Unpin> Generator for Box<G> {
-    type Yield = G::Yield;
-    type Return = G::Return;
-
-    fn resume(mut self: Pin<&mut Self>) -> GeneratorState<Self::Yield, Self::Return> {
-        G::resume(Pin::new(&mut *self))
-    }
-}
-
-#[cfg(bootstrap)]
-#[unstable(feature = "generator_trait", issue = "43122")]
-impl<G: ?Sized + Generator> Generator for Pin<Box<G>> {
-    type Yield = G::Yield;
-    type Return = G::Return;
-
-    fn resume(mut self: Pin<&mut Self>) -> GeneratorState<Self::Yield, Self::Return> {
-        G::resume((*self).as_mut())
-    }
-}
-
-#[cfg(not(bootstrap))]
 #[unstable(feature = "generator_trait", issue = "43122")]
 impl<G: ?Sized + Generator<R> + Unpin, R> Generator<R> for Box<G> {
     type Yield = G::Yield;
@@ -1138,7 +1115,6 @@ impl<G: ?Sized + Generator<R> + Unpin, R> Generator<R> for Box<G> {
     }
 }
 
-#[cfg(not(bootstrap))]
 #[unstable(feature = "generator_trait", issue = "43122")]
 impl<G: ?Sized + Generator<R>, R> Generator<R> for Pin<Box<G>> {
     type Yield = G::Yield;

src/libcore/cell.rs

@@ -1538,7 +1538,7 @@ impl<T: ?Sized + fmt::Display> fmt::Display for RefMut<'_, T> {
 #[lang = "unsafe_cell"]
 #[stable(feature = "rust1", since = "1.0.0")]
 #[repr(transparent)]
-#[cfg_attr(not(bootstrap), repr(no_niche))] // rust-lang/rust#68303.
+#[repr(no_niche)] // rust-lang/rust#68303.
 pub struct UnsafeCell<T: ?Sized> {
     value: T,
 }

src/libcore/lib.rs

@@ -140,7 +140,7 @@
 #![feature(associated_type_bounds)]
 #![feature(const_type_id)]
 #![feature(const_caller_location)]
-#![cfg_attr(not(bootstrap), feature(no_niche))] // rust-lang/rust#68303
+#![feature(no_niche)] // rust-lang/rust#68303
 
 #[prelude_import]
 #[allow(unused)]

src/libcore/ops/generator.rs

@@ -67,7 +67,7 @@ pub enum GeneratorState<Y, R> {
 #[lang = "generator"]
 #[unstable(feature = "generator_trait", issue = "43122")]
 #[fundamental]
-pub trait Generator<#[cfg(not(bootstrap))] R = ()> {
+pub trait Generator<R = ()> {
     /// The type of value this generator yields.
     ///
     /// This associated type corresponds to the `yield` expression and the
@@ -110,35 +110,9 @@ pub trait Generator<#[cfg(not(bootstrap))] R = ()> {
     /// been returned previously. While generator literals in the language are
     /// guaranteed to panic on resuming after `Complete`, this is not guaranteed
     /// for all implementations of the `Generator` trait.
-    fn resume(
-        self: Pin<&mut Self>,
-        #[cfg(not(bootstrap))] arg: R,
-    ) -> GeneratorState<Self::Yield, Self::Return>;
+    fn resume(self: Pin<&mut Self>, arg: R) -> GeneratorState<Self::Yield, Self::Return>;
 }
 
-#[cfg(bootstrap)]
-#[unstable(feature = "generator_trait", issue = "43122")]
-impl<G: ?Sized + Generator> Generator for Pin<&mut G> {
-    type Yield = G::Yield;
-    type Return = G::Return;
-
-    fn resume(mut self: Pin<&mut Self>) -> GeneratorState<Self::Yield, Self::Return> {
-        G::resume((*self).as_mut())
-    }
-}
-
-#[cfg(bootstrap)]
-#[unstable(feature = "generator_trait", issue = "43122")]
-impl<G: ?Sized + Generator + Unpin> Generator for &mut G {
-    type Yield = G::Yield;
-    type Return = G::Return;
-
-    fn resume(mut self: Pin<&mut Self>) -> GeneratorState<Self::Yield, Self::Return> {
-        G::resume(Pin::new(&mut *self))
-    }
-}
-
-#[cfg(not(bootstrap))]
 #[unstable(feature = "generator_trait", issue = "43122")]
 impl<G: ?Sized + Generator<R>, R> Generator<R> for Pin<&mut G> {
     type Yield = G::Yield;
@@ -149,7 +123,6 @@ impl<G: ?Sized + Generator<R>, R> Generator<R> for Pin<&mut G> {
     }
 }
 
-#[cfg(not(bootstrap))]
 #[unstable(feature = "generator_trait", issue = "43122")]
 impl<G: ?Sized + Generator<R> + Unpin, R> Generator<R> for &mut G {
     type Yield = G::Yield;

src/librustc_data_structures/box_region.rs

@@ -25,22 +25,6 @@ pub struct PinnedGenerator<I, A, R> {
 }
 
 impl<I, A, R> PinnedGenerator<I, A, R> {
-    #[cfg(bootstrap)]
-    pub fn new<T: Generator<Yield = YieldType<I, A>, Return = R> + 'static>(
-        generator: T,
-    ) -> (I, Self) {
-        let mut result = PinnedGenerator { generator: Box::pin(generator) };
-
-        // Run it to the first yield to set it up
-        let init = match Pin::new(&mut result.generator).resume() {
-            GeneratorState::Yielded(YieldType::Initial(y)) => y,
-            _ => panic!(),
-        };
-
-        (init, result)
-    }
-
-    #[cfg(not(bootstrap))]
     pub fn new<T: Generator<Yield = YieldType<I, A>, Return = R> + 'static>(
         generator: T,
     ) -> (I, Self) {
@@ -55,19 +39,6 @@ impl<I, A, R> PinnedGenerator<I, A, R> {
         (init, result)
     }
 
-    #[cfg(bootstrap)]
-    pub unsafe fn access(&mut self, closure: *mut dyn FnMut()) {
-        BOX_REGION_ARG.with(|i| {
-            i.set(Action::Access(AccessAction(closure)));
-        });
-
-        // Call the generator, which in turn will call the closure in BOX_REGION_ARG
-        if let GeneratorState::Complete(_) = Pin::new(&mut self.generator).resume() {
-            panic!()
-        }
-    }
-
-    #[cfg(not(bootstrap))]
     pub unsafe fn access(&mut self, closure: *mut dyn FnMut()) {
         BOX_REGION_ARG.with(|i| {
             i.set(Action::Access(AccessAction(closure)));
@@ -79,16 +50,6 @@ impl<I, A, R> PinnedGenerator<I, A, R> {
         }
     }
 
-    #[cfg(bootstrap)]
-    pub fn complete(&mut self) -> R {
-        // Tell the generator we want it to complete, consuming it and yielding a result
-        BOX_REGION_ARG.with(|i| i.set(Action::Complete));
-
-        let result = Pin::new(&mut self.generator).resume();
-        if let GeneratorState::Complete(r) = result { r } else { panic!() }
-    }
-
-    #[cfg(not(bootstrap))]
     pub fn complete(&mut self) -> R {
         // Tell the generator we want it to complete, consuming it and yielding a result
         BOX_REGION_ARG.with(|i| i.set(Action::Complete));

src/libstd/future.rs

@@ -41,10 +41,7 @@ impl<T: Generator<Yield = ()>> Future for GenFuture<T> {
         // Safe because we're !Unpin + !Drop mapping to a ?Unpin value
         let gen = unsafe { Pin::map_unchecked_mut(self, |s| &mut s.0) };
         let _guard = unsafe { set_task_context(cx) };
-        match gen.resume(
-            #[cfg(not(bootstrap))]
-            (),
-        ) {
+        match gen.resume(()) {
             GeneratorState::Yielded(()) => Poll::Pending,
             GeneratorState::Complete(x) => Poll::Ready(x),
         }

src/stage0.txt

@@ -12,7 +12,7 @@
 # source tarball for a stable release you'll likely see `1.x.0` for rustc and
 # `0.x.0` for Cargo where they were released on `date`.
 
-date: 2020-02-29
+date: 2020-03-12
 rustc: beta
 cargo: beta