fix

Author: kripken

src/wasm/wasm-binary.cpp

@@ -2518,12 +2518,15 @@ getOrMakeName(const std::unordered_map<Index, Name>& nameMap,
               Name name,
               std::unordered_set<Name>& usedNames) {
   if (auto it = nameMap.find(i); it != nameMap.end()) {
-    return {it->second, true};
-  } else {
-    auto valid = Names::getValidNameGivenExisting(name, usedNames);
-    usedNames.insert(valid);
-    return {valid, false};
-  }
+    // We found a name in the names section. Use it, and also note it as used
+    // so we don't generate such a name below, later.
+    auto mappedName = it->second;
+    usedNames.insert(mappedName);
+    return {mappedName, true};
+  }
+  auto valid = Names::getValidNameGivenExisting(name, usedNames);
+  usedNames.insert(valid);
+  return {valid, false};
 }
 
 void WasmBinaryReader::readMemories() {