Switch CI to using stable instead of nightly toolchain

(cherry picked from commit 6062bdb5cd)

.github/workflows/main.yml

@@ -16,7 +16,7 @@ jobs:
           - u64_backend
           - u32_backend
         toolchain:
-          - nightly
+          - stable
           - 1.41.0
     name: test
     steps:
@@ -79,7 +79,7 @@ jobs:
       fail-fast: false
       matrix:
         toolchain:
-          - nightly
+          - stable
           - 1.41.0
     name: test simple_login command-line example
     steps:
@@ -103,7 +103,7 @@ jobs:
       fail-fast: false
       matrix:
         toolchain:
-          - nightly
+          - stable
           - 1.41.0
     name: test digital_locker command-line example
     steps:
@@ -148,11 +148,11 @@ jobs:
       - name: Checkout sources
         uses: actions/checkout@v2
 
-      - name: Install nightly toolchain
+      - name: Install stable toolchain
         uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          toolchain: nightly
+          toolchain: stable
           override: true
           components: rustfmt, clippy
 
@@ -170,11 +170,11 @@ jobs:
       - name: Checkout sources
         uses: actions/checkout@v2
 
-      - name: Install nightly toolchain
+      - name: Install stable toolchain
         uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          toolchain: nightly
+          toolchain: stable
           override: true
           components: rustfmt, clippy
 

src/messages.rs

@@ -104,8 +104,8 @@ impl<CS: CipherSuite> RegistrationResponse<CS> {
             KeyPair::<CS::Group>::check_public_key(Key::from_bytes(&checked_slice[elem_len..])?)?;
 
         Ok(Self {
-            server_s_pk: server_s_pk.to_arr().to_vec(),
             beta,
+            server_s_pk: server_s_pk.to_arr().to_vec(),
         })
     }
 }