nodejs
diff --git a/‎lib/buffer.js‎
Lines changed: 5 additions & 3 deletions b/‎lib/buffer.js‎
Lines changed: 5 additions & 3 deletions
diff --git a/‎src/node_buffer.cc‎
Lines changed: 2 additions & 2 deletions b/‎src/node_buffer.cc‎
Lines changed: 2 additions & 2 deletions
@@ -112,6 +112,8 @@ const {
   inspect: utilInspect,
 } = require('internal/util/inspect');
 
+const assert = require('internal/assert');
+
 const {
   codes: {
     ERR_BUFFER_OUT_OF_BOUNDS,
@@ -1389,9 +1391,9 @@ function atob(input) {
       throw lazyDOMException(
         'The string to be decoded is not correctly encoded.',
         'InvalidCharacterError');
-    case -3: // Possible overflow
-      // TODO(@anonrig): Throw correct error in here.
-      throw lazyDOMException('The input causes overflow.', 'InvalidCharacterError');
+    case -3:
+      assert.fail('Unrecognized simdutf error');
+      break;
     default:
       return result;
   }
 
@@ -1413,7 +1413,7 @@ static void Btoa(const FunctionCallbackInfo<Value>& args) {
 // In case of error, a negative value is returned:
 // * -1 indicates a single character remained,
 // * -2 indicates an invalid character,
-// * -3 indicates a possible overflow (i.e., more than 2 GB output).
+// * -3 indicates an unrecognized simdutf error.
 static void Atob(const FunctionCallbackInfo<Value>& args) {
   CHECK_EQ(args.Length(), 1);
   Environment* env = Environment::GetCurrent(args);
@@ -1458,7 +1458,7 @@ static void Atob(const FunctionCallbackInfo<Value>& args) {
     return args.GetReturnValue().Set(value);
   }
 
-  // Default value is: "possible overflow"
+  // Default value is: "unrecognized simdutf error"
   int32_t error_code = -3;
 
   if (result.error == simdutf::error_code::INVALID_BASE64_CHARACTER) {