Fix rust setup

.github/workflows/rust.yml

@@ -41,6 +41,26 @@ jobs:
         run: |
           cd rust
           cargo test --verbose
+
+  publish-dry-run:
+    name: cargo:publish-dry-run
+    runs-on: ubuntu-latest
+    continue-on-error: true
+    steps:
+      - uses: actions/checkout@v6
+      - name: Install Rust tools
+        run: |
+          rustup update --no-self-update stable
+          rustup default stable
+      - uses: actions/cache@v5
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+            rust/target
+          key: ${{ runner.os }}-cargo-${{ hashFiles('rust/Cargo.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-cargo-
       - name: Test publish crates
         run: |
           cd rust

rust/ruby-rbs/src/node/mod.rs

@@ -14,7 +14,7 @@ use std::ptr::NonNull;
 /// ```
 pub fn parse(rbs_code: &[u8]) -> Result<SignatureNode<'_>, String> {
     unsafe {
-        let start_ptr = rbs_code.as_ptr() as *const i8;
+        let start_ptr = rbs_code.as_ptr() as *const std::os::raw::c_char;
         let end_ptr = start_ptr.add(rbs_code.len());
         let bytes = rbs_code.len() as i32;