From 55401a447ff2c478f37287d30fc24e036a131b45 Mon Sep 17 00:00:00 2001
From: Katy Coe <djkaty@users.noreply.github.com>
Date: Tue, 23 Feb 2021 23:44:07 +0100
Subject: [PATCH] Formats: Don't crash on secondary load strategies with
 existing type mappings (#140)

---
 Il2CppInspector.Common/IL2CPP/Il2CppBinary.cs | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/Il2CppInspector.Common/IL2CPP/Il2CppBinary.cs b/Il2CppInspector.Common/IL2CPP/Il2CppBinary.cs
index 389e60e..77e54ea 100644
--- a/Il2CppInspector.Common/IL2CPP/Il2CppBinary.cs
+++ b/Il2CppInspector.Common/IL2CPP/Il2CppBinary.cs
@@ -121,8 +121,12 @@ namespace Il2CppInspector
 
             // Set width of long (convert to sizeof(int) for 32-bit files)
             if (stream[0].Bits == 32) {
-                stream[0].AddPrimitiveMapping(typeof(long), typeof(int));
-                stream[0].AddPrimitiveMapping(typeof(ulong), typeof(uint));
+                try {
+                    stream[0].AddPrimitiveMapping(typeof(long), typeof(int));
+                } catch (ArgumentException) { }
+                try {
+                    stream[0].AddPrimitiveMapping(typeof(ulong), typeof(uint));
+                } catch (ArgumentException) { }
             }
             
             return (Il2CppBinary) Activator.CreateInstance(type, stream[0], statusCallback);