[Dart] Fix namespace alias from union type (#9088)

* Fix namespace alias from union type

* Fix namespace alias from union type

src/idl_gen_dart.cpp

@@ -654,34 +654,15 @@ class DartGenerator : public BaseGenerator {
 
   std::string NamespaceAliasFromUnionType(Namespace* root_namespace,
                                           const Type& type) {
-    const std::vector<std::string> qualified_name_parts =
-        type.struct_def->defined_namespace->components;
-    if (std::equal(root_namespace->components.begin(),
-                   root_namespace->components.end(),
-                   qualified_name_parts.begin())) {
+    const Namespace& type_namespace = *type.struct_def->defined_namespace;
+    if (root_namespace->components == type_namespace.components) {
       return namer_.Type(*type.struct_def);
     }
 
-    std::string ns;
-
-    for (auto it = qualified_name_parts.begin();
-         it != qualified_name_parts.end(); ++it) {
-      auto& part = *it;
-
-      for (size_t i = 0; i < part.length(); i++) {
-        if (i && !isdigit(part[i]) && part[i] == CharToUpper(part[i])) {
-          ns += "_";
-          ns += CharToLower(part[i]);
-        } else {
-          ns += CharToLower(part[i]);
-        }
-      }
-      if (it != qualified_name_parts.end() - 1) {
-        ns += "_";
-      }
-    }
-
-    return ns + "." + namer_.Type(*type.struct_def);
+    const std::string ns = namer_.Namespace(type_namespace);
+    return ns.empty()
+               ? namer_.Type(*type.struct_def)
+               : ImportAliasName(ns) + "." + namer_.Type(*type.struct_def);
   }
 
   void GenImplementationGetters(

swift/Sources/FlatBuffers/Verifiable.swift

@@ -56,8 +56,15 @@ extension Verifiable {
     let len: UOffset = try verifier.getValue(at: position)
     let intLen = Int(len)
     let start = Int(clamping: (position &+ MemoryLayout<Int32>.size).magnitude)
+    let byteCount = intLen.multipliedReportingOverflow(
+      by: MemoryLayout<T>.size)
+    guard !byteCount.overflow else {
+      throw FlatbuffersErrors.outOfBounds(
+        position: UInt.max,
+        end: verifier.capacity)
+    }
     try verifier.isAligned(position: start, type: type.self)
-    try verifier.rangeInBuffer(position: start, size: intLen)
+    try verifier.rangeInBuffer(position: start, size: byteCount.partialValue)
     return (start, intLen)
   }
 }

tests/swift/Tests/Flatbuffers/FlatbuffersVerifierTests.swift

@@ -411,6 +411,27 @@ final class FlatbuffersVerifierTests {
     }
   }
 
+  @Test(.bug("https://github.com/google/flatbuffers/issues/9082"))
+  func testRejectsTruncatedScalarVector() {
+    // swiftformat:disable all
+    var byteBuffer = ByteBuffer(bytes: [
+      16, 0, 0, 0,
+      6, 0, 8, 0,
+      4, 0, 0, 0,
+      0, 0, 0, 0,
+      12, 0, 0, 0,
+      8, 0, 0, 0,
+      0, 0, 0, 0,
+      2, 0, 0, 0,
+      65, 66,
+    ])
+    // swiftformat:enable all
+
+    #expect(throws: FlatbuffersErrors.self) {
+      try getCheckedRoot(byteBuffer: &byteBuffer) as Swift_Tests_Vectors
+    }
+  }
+
   @Test
   func testValidUnionBuffer() {
     let string = "Awesome \\\\t\t\nstring!"