fix vtableIdx error with empty slot reserved

src/backend/binaryen/wasm_expr_gen.ts

@@ -1950,12 +1950,12 @@ export class WASMExpressionGen {
                 index--;
             }
             /** it occupies two slots */
-            if (members[i].hasGetter && members[i].hasSetter) {
+            if (members[i].hasGetter || members[i].hasSetter) {
                 index++;
             }
         }
 
-        if (isSetter && member.hasGetter) {
+        if (isSetter) {
             index++;
         }
 

tests/samples/class_accessor.ts

@@ -311,4 +311,64 @@ export function test15() {
     const i3: I3 = new Z(1);
     i3.ref = 2;
     console.log(i3.ref);
+}
+
+class OnlySetter {
+    a = 1;
+
+    constructor(a: number) {
+        this.a = a;
+        this.foo();
+        this.bar();
+    }
+
+    foo() {
+        console.log('invoke foo');
+    }
+
+    set value(a: number) {
+        this.a = a;
+    }
+
+    bar() {
+        console.log('invoke bar');
+    }
+}
+
+export function testOnlySetter() {
+    const obj = new OnlySetter(10);
+    console.log(obj.a);
+    obj.a = 100;
+    console.log(obj.a);
+}
+
+class OnlyGetter {
+    a = 1;
+
+    constructor(a: number) {
+        this.a = a;
+        this.foo();
+        this.bar();
+    }
+
+    foo() {
+        console.log('invoke foo');
+    }
+
+
+    get value() : number {
+        return this.a;
+    }
+
+
+    bar() {
+        console.log('invoke bar');
+    }
+}
+
+export function testOnlyGetter() {
+    const obj = new OnlyGetter(10);
+    console.log(obj.value);
+    obj.a = 100;
+    console.log(obj.value);
 }

tools/validate/wamr/validation.json

@@ -1752,6 +1752,16 @@
                 "name": "test15",
                 "args": [],
                 "result": "undefined\n2\n1\n1\n2"
+            },
+            {
+                "name": "testOnlySetter",
+                "args": [],
+                "result": "invoke foo\ninvoke bar\n10\n100"
+            },
+            {
+                "name": "testOnlyGetter",
+                "args": [],
+                "result": "invoke foo\ninvoke bar\n10\n100"
             }
         ]
     },