ci: new CI

.github/workflows/checks.yml

@@ -0,0 +1,83 @@
+name: checks
+on:
+  pull_request:
+  merge_group:
+    types: [checks_requested]
+  workflow_dispatch:
+jobs:
+  practices:
+    name: Practices
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v7
+      - name: install
+        uses: dtolnay/rust-toolchain@nightly
+      - name: style
+        run: |
+          rustup component add rustfmt
+          cargo fmt --all --check
+      - name: clippy
+        run: |
+          rustup component add clippy
+          cargo clippy
+      - name: docs
+        run: cargo doc --all-features
+  miri:
+    name: Miri
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v7
+      - name: install
+        uses: dtolnay/rust-toolchain@nightly
+      - name: default features
+        run: |
+          rustup component add miri
+          cargo miri test
+      - name: all features
+        run: cargo miri test --all-features
+  stable:
+    name: Stable
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v7
+      - name: install
+        uses: dtolnay/rust-toolchain@stable
+      - name: test default features
+        run: cargo test
+  nightly:
+    name: Nightly
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v7
+      - name: install
+        uses: dtolnay/rust-toolchain@nightly
+      - name: test default features
+        run: cargo test
+      - name: test all features
+        run: cargo test --all-features
+  nostd:
+      name: NoStd
+      runs-on: ubuntu-latest
+      steps:
+        - name: checkout
+          uses: actions/checkout@v7
+        - name: install
+          uses: dtolnay/rust-toolchain@stable
+          with:
+            target: thumbv7m-none-eabi
+        - name: test default features
+          run: cargo test
+  msrv:
+    name: MSRV
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v7
+      - name: install
+        uses: dtolnay/rust-toolchain@1.86
+      - name: test default features
+        run: cargo test

.github/workflows/fuzzing.yml

@@ -0,0 +1,21 @@
+name: fuzzing
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: "0 0 * * *"
+jobs:
+  fuzz:
+    name: Fuzz
+    if: github.repository == 'servo/rust-smallvec'
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v7
+      - name: install
+        uses: dtolnay/rust-toolchain@stable
+      - name: fuzzing
+        run: |
+          sudo apt-get update -y
+          sudo apt-get install -y binutils-dev libunwind8-dev libcurl4-openssl-dev 
+          sudo apt-get install -y libelf-dev libdw-dev cmake gcc libiberty-dev
+          ./travis-fuzz.sh

.github/workflows/performance.yml

@@ -0,0 +1,26 @@
+name: performance
+on:
+  push:
+    branches: [v2]
+  workflow_dispatch:
+jobs:
+  default:
+    name: Default
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v7
+      - name: install
+        uses: dtolnay/rust-toolchain@nightly
+      - name: bench
+        run: cargo bench
+  all:
+    name: All
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v7
+      - name: install
+        uses: dtolnay/rust-toolchain@nightly
+      - name: bench
+        run: cargo bench --all-features

src/taggedlen.rs

@@ -60,19 +60,21 @@ impl<T> TaggedLen<T> {
     /// current len+n must be smaller than MAX_LEN on 64-bit target
     #[inline(always)]
     pub const unsafe fn add(&mut self, n: usize) {
-        #[cold]
-        #[inline(never)]
-        const fn assert_failed() {
-            panic!("smallvec length overflow")
-        }
         #[cfg(any(debug_assertions, not(target_pointer_width = "64")))]
-        match self.len().checked_add(n) {
-            Some(value) => {
-                if value > Self::MAX_LEN {
-                    assert_failed()
+        {
+            #[cold]
+            #[inline(never)]
+            const fn assert_failed() {
+                panic!("smallvec length overflow")
+            }
+            match self.len().checked_add(n) {
+                Some(value) => {
+                    if value > Self::MAX_LEN {
+                        assert_failed()
+                    }
                 }
+                None => assert_failed()
             }
-            None => assert_failed()
         }
         self.0 += n << Self::SHIFT;
     }

tests/borsh.rs

@@ -16,7 +16,7 @@ fn round_trip() {
 
 #[test]
 fn round_trip_zst() {
-    let smallvec = SmallVec::<(), 5>::from([(); 0x100000]);
+    let smallvec = SmallVec::<(), 5>::from([(); 0x100]);
     let bytes = to_vec(&smallvec).unwrap();
     let new = SmallVec::<(), 100>::deserialize(&mut bytes.as_ref()).unwrap();
     assert_eq!(new, smallvec);