Check for unknown features (#95)

.github/workflows/features.yml

@@ -0,0 +1,26 @@
+name: Check for unknown features
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+jobs:
+  unknown-features:
+    name: Check for unknown features
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+    steps:
+      - uses: actions/checkout@v2
+      - name: Fetch toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: nightly
+      - name: Check for unknown features
+        env:
+          RUSTFLAGS: "-D unexpected-cfgs"
+        uses: actions-rs/cargo@v1
+        with:
+          command: check
+          args: -Z unstable-options -Z check-cfg=features --tests
+          toolchain: nightly

num_enum/tests/from_primitive.rs

@@ -77,7 +77,6 @@ fn from_primitive_number() {
 }
 
 #[test]
-#[cfg(feature = "nightly")]
 fn from_primitive_number_catch_all() {
     #[derive(Debug, Eq, PartialEq, FromPrimitive)]
     #[repr(u8)]

num_enum/tests/into_primitive.rs

@@ -27,7 +27,6 @@ fn simple() {
 }
 
 #[test]
-#[cfg(feature = "nightly")]
 fn catch_all() {
     #[derive(Debug, Eq, PartialEq, IntoPrimitive)]
     #[repr(u8)]