Require nightly compiler

Author: TimDiekmann

.github/workflows/test.yml

@@ -13,34 +13,21 @@ jobs:
           - windows-latest
           - macOS-latest
         rust:
-          - stable
-          - beta
           - nightly
         cargo_flags:
           - ""
           - "--no-default-features"
-          - "--features nightly"
-          - "--features nightly --no-default-features"
-        exclude:
-          - rust: stable
-            cargo_flags: "--features nightly"
-          - rust: stable
-            cargo_flags: "--features nightly --no-default-features"
-          - rust: beta
-            cargo_flags: "--features nightly"
-          - rust: beta
-            cargo_flags: "--features nightly --no-default-features"
     steps:
       - name: Install Rust
-        uses: hecrj/setup-rust-action@master
-        with:
-          rust-version: ${{ matrix.rust }}
+        run: |
+          rustup set profile minimal
+          rustup default nightly
 
       - name: Checkout source code
         uses: actions/checkout@master
 
       - name: Build
-        run: cargo build --all ${{ matrix.cargo_flags }} ${{ matrix.additional_flags }}
+        run: cargo build --all ${{ matrix.cargo_flags }}
 
       - name: Test
-        run: cargo test --all ${{ matrix.cargo_flags }} ${{ matrix.additional_flags }}
+        run: cargo test --all ${{ matrix.cargo_flags }}

Cargo.toml

@@ -17,25 +17,3 @@ maintenance = { status = "actively-developed" }
 [features]
 std = []
 default = ["std"]
-dropck_eyepatch = []
-coerce_unsized = []
-const_generics = []
-core_intrinsics = []
-dispatch_from_dyn = []
-exact_size_is_empty = []
-fn_traits = []
-never_type = []
-boxed_slice_try_from = ["const_generics"]
-receiver_trait = []
-nightly = [
-    "dropck_eyepatch",
-    "coerce_unsized",
-    "const_generics",
-    "core_intrinsics",
-    "dispatch_from_dyn",
-    "exact_size_is_empty",
-    "fn_traits",
-    "never_type",
-    "boxed_slice_try_from",
-    "receiver_trait",
-]

README.md

@@ -12,7 +12,7 @@ Alloc-WG
 An attempt to collect several proposals of [rust-lang/wg-allocators](https://github.com/rust-lang/wg-allocators) into a
 MVP.
 
-**This crate is WIP** and is designed to replace the alloc crate. However, this is not completely possible as crate, as some 
+**This crate is WIP**, requires a nightly compiler, and is designed to replace the alloc crate. However, this is not completely possible as crate, as some 
 compiler features are not possible for crates.
 
 Changes regarding the current `Alloc` trait

src/alloc/abort.rs

@@ -33,7 +33,7 @@ impl<A: DeallocRef> DeallocRef for AbortAlloc<A> {
 }
 
 impl<A: AllocRef> AllocRef for AbortAlloc<A> {
-    type Error = crate::Never;
+    type Error = !;
 
     fn alloc(&mut self, layout: NonZeroLayout) -> Result<NonNull<u8>, Self::Error> {
         self.0