Clear decoders after the image decoder in the /Filter array

core/src/fpdfapi/fpdf_parser/fpdf_parser_decode_embeddertest.cpp

 // Copyright 2015 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <cstring>
 #include <string>
 
 #include "../../../../testing/fx_string_testhelpers.h"
 #include "../../../testing/embedder_test.h"
 #include "core/include/fpdfapi/fpdf_parser.h"
@@ skipping 77 matching lines @@
     unsigned int result_size;
     FlateDecode(ptr->input, ptr->input_size, result, result_size);
     ASSERT_TRUE(result);
     EXPECT_EQ(std::string((const char*)ptr->expected, ptr->expected_size),
               std::string((const char*)result, result_size))
         << " for case " << i;
     FX_Free(result);
   }
 }
 
+TEST_F(FPDFParserDecodeEmbeddertest, Bug_552046) {
+  // Tests specifying multiple image filters for a stream. Should not cause a
+  // crash when rendered.
+  EXPECT_TRUE(OpenDocument("bug_552046.pdf"));
+  FPDF_PAGE page = LoadPage(0);
+  FPDF_BITMAP bitmap = RenderPage(page);
+  FPDFBitmap_Destroy(bitmap);
+  UnloadPage(page);
+}
+
 #undef TEST_CASE