3 files changed, 21 insertions, 2 deletions
diff --git a/src/tools/fuzzing/fuzzing.cpp b/src/tools/fuzzing/fuzzing.cpp
index c828c84d0..5489e7638 100644
--- a/src/tools/fuzzing/fuzzing.cpp
+++ b/src/tools/fuzzing/fuzzing.cpp
@@ -3091,6 +3091,11 @@ HeapType TranslateToFuzzReader::getSubType(HeapType type) {
       case HeapType::data:
         // TODO: nontrivial types as well.
         return HeapType::data;
+      case HeapType::string:
+      case HeapType::stringview_wtf8:
+      case HeapType::stringview_wtf16:
+      case HeapType::stringview_iter:
+        WASM_UNREACHABLE("TODO: fuzz strings");
     }
   }
   // TODO: nontrivial types as well.
diff --git a/src/tools/fuzzing/heap-types.cpp b/src/tools/fuzzing/heap-types.cpp
index 2e96087d7..77891ce53 100644
--- a/src/tools/fuzzing/heap-types.cpp
+++ b/src/tools/fuzzing/heap-types.cpp
@@ -303,6 +303,11 @@ struct HeapTypeGeneratorImpl {
           return generateSubEq();
         case HeapType::data:
           return generateSubData();
+        case HeapType::string:
+        case HeapType::stringview_wtf8:
+        case HeapType::stringview_wtf16:
+        case HeapType::stringview_iter:
+          WASM_UNREACHABLE("TODO: fuzz strings");
       }
       WASM_UNREACHABLE("unexpected index");
     }
@@ -390,6 +395,11 @@ struct HeapTypeGeneratorImpl {
           return HeapType::i31;
         case HeapType::data:
           return pickSubData();
+        case HeapType::string:
+        case HeapType::stringview_wtf8:
+        case HeapType::stringview_wtf16:
+        case HeapType::stringview_iter:
+          WASM_UNREACHABLE("TODO: fuzz strings");
       }
       WASM_UNREACHABLE("unexpected kind");
     }
@@ -503,6 +513,11 @@ struct HeapTypeGeneratorImpl {
           }
         case HeapType::data:
           return DataKind{};
+        case HeapType::string:
+        case HeapType::stringview_wtf8:
+        case HeapType::stringview_wtf16:
+        case HeapType::stringview_iter:
+          WASM_UNREACHABLE("TODO: fuzz strings");
       }
       WASM_UNREACHABLE("unexpected kind");
     } else {
diff --git a/src/tools/spec-wrapper.h b/src/tools/spec-wrapper.h
index 43c0e9353..c2a49c598 100644
--- a/src/tools/spec-wrapper.h
+++ b/src/tools/spec-wrapper.h
@@ -62,9 +62,8 @@ inline std::string generateSpecWrapper(Module& wasm) {
           ret += "(ref.null eq)";
           break;
         case Type::i31ref:
-          WASM_UNREACHABLE("TODO: i31ref");
         case Type::dataref:
-          WASM_UNREACHABLE("TODO: dataref");
+          WASM_UNREACHABLE("TODO: reftypes");
         case Type::none:
         case Type::unreachable:
           WASM_UNREACHABLE("unexpected type");