add type

Author: huahaiy

.cirrus.yml

@@ -42,7 +42,7 @@ task:
   macos_instance:
     image: ghcr.io/cirruslabs/macos-runner:sonoma
   # only_if: $CIRRUS_TAG != ''
-  only_if: "changesInclude('macosx-arm64/*', '.cirrus.yml')"
+  only_if: "changesInclude('macosx-arm64/*', '.cirrus.yml', 'src/*')"
   script: |
     git submodule init
     git submodule update --init --recursive

src/java/datalevin/dtlvnative/Test.java

@@ -186,8 +186,10 @@ static void expect(boolean must_be_true, String message) {
     }
 
     static void expectNoError(PointerPointer<BytePointer> error, String message) {
-        if (error.get() != null) {
-            String msg = error.get().getString();
+
+        BytePointer errPtr = error.get();
+        if (errPtr != null) {
+            String msg = errPtr.getString();
             System.out.println(message + ": " + msg);
             System.exit(-1);
         }