1 files changed, 8 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/parser/ParserArena.h b/Source/JavaScriptCore/parser/ParserArena.h
index 45d4b158e..8d790c44c 100644
--- a/Source/JavaScriptCore/parser/ParserArena.h
+++ b/Source/JavaScriptCore/parser/ParserArena.h
@@ -71,6 +71,10 @@ namespace JSC {
     template <typename T>
     ALWAYS_INLINE const Identifier& IdentifierArena::makeIdentifier(VM* vm, const T* characters, size_t length)
     {
+        if (length == 0) {
+            m_identifiers.append(Identifier(Identifier::EmptyIdentifier));
+            return m_identifiers.last();
+        }
         if (characters[0] >= MaximumCachableCharacter) {
             m_identifiers.append(Identifier(vm, characters, length));
             return m_identifiers.last();
@@ -92,6 +96,10 @@ namespace JSC {
 
     ALWAYS_INLINE const Identifier& IdentifierArena::makeIdentifierLCharFromUChar(VM* vm, const UChar* characters, size_t length)
     {
+        if (length == 0) {
+            m_identifiers.append(Identifier(Identifier::EmptyIdentifier));
+            return m_identifiers.last();
+        }
         if (characters[0] >= MaximumCachableCharacter) {
             m_identifiers.append(Identifier::createLCharFromUChar(vm, characters, length));
             return m_identifiers.last();