Unhandled Access Violation in ntdll.dll When Building Assets For Scene.

Question

Everytime I try to build my project; Unity Editor crashes when the compiler reaches "Building assets for scene".

Note, it crashes, not freeze.

Scene 0 builds fine because there is barely anything in it, but any other scene fails with.

Unhandled exception at 0x00007FFB19A9B179 (ntdll.dll) in Unity.exe: 0xC0000005: Access violation writing location 0x0000000000000118.

I'm using V5.1.2f1 and I've tried reinstalling it.

I did not have this problem a few months ago with 4.x, but the project has grown a lot since then and I have not built an .exe since then.

Game runs fine in editor.

Any advice on how to debug this is greatly appreciated.

Thanks.

Answer 1

I managed to find three issues that caused the compiler to crash. I have not found the root cause, but I can work around it for now. Each of the items below caused the compiler to crash by themselves.

Change scene build order, I had to build my largest scene first.
Instead of loading .mp4 videos as assets in the editor, I load them at runtime one by one.

Removed all references to this custom shader.

Shader "Custom/Outline2D" { Properties { _MainTex ("Base (RGB)", 2D) = "white" {} _OutLineSpread ("Outline Spread", Range(0,0.02)) = 0.007 _Alpha ("Alpha", float) = 1 _Color ("Color", Color) = (1,1,1,1) }

  SubShader
     {
         Tags {"Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent"}
         ZWrite Off Blend One OneMinusSrcAlpha Cull Off
         Lighting On
         
         CGPROGRAM
         #pragma surface surf NoLighting alpha
  
         struct Input 
         {
             float2 uv_MainTex;
             fixed4 color : COLOR;
         };
  
         sampler2D _MainTex;
         float _OutLineSpread;
         float _Alpha;
         fixed4 _Color;
  
         void surf(Input IN, inout SurfaceOutput o)
         {
             fixed4 mainColor =
             (tex2D(_MainTex, IN.uv_MainTex+float2(_OutLineSpread,_OutLineSpread))
             + tex2D(_MainTex, IN.uv_MainTex+float2(-_OutLineSpread,-_OutLineSpread))
             + tex2D(_MainTex, IN.uv_MainTex+float2(-_OutLineSpread,_OutLineSpread))
             + tex2D(_MainTex, IN.uv_MainTex+float2(_OutLineSpread,-_OutLineSpread)))
             * fixed4(_Color.r, _Color.g, _Color.b, _Alpha);
 
             mainColor = fixed4(1,1,1, mainColor.a);
             
             fixed4 addcolor = tex2D(_MainTex, IN.uv_MainTex) * IN.color;
  
             if(addcolor.a > _Alpha - 0.05){
             mainColor = addcolor;}
  
             o.Albedo = mainColor.rgb * 0.85f;
             o.Alpha = mainColor.a;
         }
         
         fixed4 LightingNoLighting(SurfaceOutput s, fixed3 lightDir, fixed atten)
     {
         half4 c;
         c.rgb = s.Albedo;
         c.a = s.Alpha;
         return c;
     }
         
         ENDCG       
     }
 }

Unhandled Access Violation in ntdll.dll When Building Assets For Scene.

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