SEGV in CFX_BaseSegmentedArray::Iterate() when CS has malformed dictionary.

core/src/fpdfapi/fpdf_parser/fpdf_parser_parser_embeddertest.cpp

Index: core/src/fpdfapi/fpdf_parser/fpdf_parser_parser_embeddertest.cpp
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser_embeddertest.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser_embeddertest.cpp
index 838c4316de9761c7fa5d301ed707d97e335b84c4..e00887ff5f335f17c5c473e2cdb8a9b3db070b97 100644
--- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser_embeddertest.cpp
+++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser_embeddertest.cpp
@@ -13,3 +13,8 @@ TEST_F(FPDFParserEmbeddertest, LoadError_454695) {
   EXPECT_TRUE(OpenDocument("testing/resources/bug_454695.pdf"));
 }
 
+TEST_F(FPDFParserEmbeddertest, Bug_481363) {
+  // Test colorspace object with malformed dictionary.
+  EXPECT_TRUE(OpenDocument("testing/resources/bug_481363.pdf"));
+  EXPECT_NE(nullptr, LoadPage(0));
+}