Fixed missed error

Author: Henrik Snöman

.github/workflows/ci.yml

@@ -20,6 +20,8 @@ jobs:
           - stm32h562
           - stm32h563
           - stm32h573
+        features:
+          - rand
     env:                        # Peripheral Feature flags
       FLAGS: rt,log
 
@@ -42,6 +44,6 @@ jobs:
       - name: Install thumbv8m rust target
         run: rustup target add thumbv8m.main-none-eabihf
       - name: Build
-        run: cargo build --verbose --release --examples --target thumbv8m.main-none-eabihf --features ${{ matrix.mcu }},${{ env.FLAGS }}
+        run: cargo build --verbose --release --examples --target thumbv8m.main-none-eabihf --features ${{ matrix.mcu }},${{ matrix.features }},${{ env.FLAGS }}
       - name: Test
-        run: cargo test --lib --target x86_64-unknown-linux-gnu --features ${{ matrix.mcu }},${{ env.FLAGS }}
+        run: cargo test --lib --target x86_64-unknown-linux-gnu --features ${{ matrix.mcu }},${{ matrix.features }},${{ env.FLAGS }}

src/rng.rs

@@ -433,9 +433,9 @@ impl<MODE> rand_core::RngCore for Rng<MODE> {
         &mut self,
         dest: &mut [u8],
     ) -> Result<(), rand_core::Error> {
-        self.fill(dest).map_err(|e| {
+        self.fill(dest).map_err(|_e| {
             core::num::NonZeroU32::new(
-                rand_core::Error::CUSTOM_START + e as u32,
+                rand_core::Error::CUSTOM_START,
             )
             // This should never fail as long as no enum variant is equal to 0
             .expect("Internal hal error")