symfony
diff --git a/‎src/Symfony/Component/Serializer/Encoder/CsvEncoder.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/Serializer/Encoder/CsvEncoder.php
+1-1Lines changed: 1 addition & 1 deletion b/‎src/Symfony/Component/Serializer/Encoder/CsvEncoder.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/Serializer/Encoder/CsvEncoder.php
+1-1Lines changed: 1 addition & 1 deletion
diff --git a/‎src/Symfony/Component/Serializer/Tests/Encoder/CsvEncoderTest.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/Serializer/Tests/Encoder/CsvEncoderTest.php
+8Lines changed: 8 additions & 0 deletions b/‎src/Symfony/Component/Serializer/Tests/Encoder/CsvEncoderTest.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/Serializer/Tests/Encoder/CsvEncoderTest.php
+8Lines changed: 8 additions & 0 deletions
@@ -167,7 +167,7 @@ public function decode(string $data, string $format, array $context = [])
                     $headerCount = array_fill(0, $nbCols, 1);
                 } else {
                     foreach ($cols as $col) {
-                        $header = explode($keySeparator, $col);
+                        $header = explode($keySeparator, $col ?? '');
                         $headers[] = $header;
                         $headerCount[] = \count($header);
                     }
 
@@ -211,6 +211,14 @@ public function testEncodeEmptyArray()
     {
         $this->assertEquals("\n\n", $this->encoder->encode([], 'csv'));
         $this->assertEquals("\n\n", $this->encoder->encode([[]], 'csv'));
+        $this->assertEquals("\n\n", $this->encoder->encode([['' => null]], 'csv'));
+    }
+
+    public function testDecodeEmptyData()
+    {
+        $data = $this->encoder->decode("\n\n", 'csv');
+
+        $this->assertSame([['' => null]], $data);
     }
 
     public function testEncodeVariableStructure()