diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/types/Multiname.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/types/Multiname.java
index a429b0c30..72d3d9dcc 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/types/Multiname.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/types/Multiname.java
@@ -254,6 +254,9 @@ public class Multiname {
         if (index == 0) {
             return "null";
         }
+        if (index >= constants.getNamespaceCount()) {
+            return "Unknown(" + index + ")";
+        }
         int type = constants.getNamespace(index).kind;
         int name_index = constants.getNamespace(index).name_index;
         String name = name_index == 0 ? null : constants.getNamespace(index).getName(constants).toRawString();
@@ -273,6 +276,9 @@ public class Multiname {
         if (index == 0) {
             return "null";
         }
+        if (index >= constants.getNamespaceSetCount()) {
+            return "Unknown(" + index + ")";
+        }
         StringBuilder ret = new StringBuilder();
         ret.append("[");
         for (int n = 0; n < constants.getNamespaceSet(index).namespaces.length; n++) {
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/types/ScriptInfo.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/types/ScriptInfo.java
index b69ee5c4c..4f7bb3cca 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/types/ScriptInfo.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/types/ScriptInfo.java
@@ -74,6 +74,9 @@ public class ScriptInfo {
         
         for (int j = 0; j < traits.traits.size(); j++) {
             Trait t = traits.traits.get(j);
+            if (t.name_index >= abc.constants.getMultinameCount()) {
+                continue;
+            }
             Multiname name = t.getName(abc);
             int nskind = name.getSimpleNamespaceKind(abc.constants);
             if ((nskind == Namespace.KIND_PACKAGE_INTERNAL)