try not to crash on shader load failure

src/main/java/me/cortex/voxy/client/iris/IrisShaderPatch.java

@@ -316,15 +316,14 @@ public class IrisShaderPatch {
         } catch (Exception e) {
             patchData = null;
             Logger.error("Failed to parse patch data gson",e);
-            IrisUtil.disableIrisShaders();
+            throw new ShaderLoadError("Failed to parse patch data gson",e);
         }
         if (patchData == null) {
             return null;
         }
         if (patchData.version != VERSION) {
             Logger.error("Shader has voxy patch data, but patch version is incorrect. expected " + VERSION + " got "+patchData.version);
-            IrisUtil.disableIrisShaders();
-            return null;
+            throw new IllegalStateException("Shader version mismatch expected " + VERSION + " got "+patchData.version);
         }
         return new IrisShaderPatch(patchData, ipack);
     }

src/main/java/me/cortex/voxy/client/iris/ShaderLoadError.java

@@ -0,0 +1,11 @@
+package me.cortex.voxy.client.iris;
+
+public class ShaderLoadError extends RuntimeException {
+    public ShaderLoadError(String reason) {
+        super(reason);
+    }
+
+    public ShaderLoadError(String reason, Exception cause) {
+        super(reason, cause);
+    }
+}

src/main/java/me/cortex/voxy/client/mixin/iris/MixinIris.java

@@ -0,0 +1,25 @@
+package me.cortex.voxy.client.mixin.iris;
+
+import me.cortex.voxy.client.iris.ShaderLoadError;
+import me.cortex.voxy.common.Logger;
+import net.irisshaders.iris.Iris;
+import net.irisshaders.iris.shaderpack.ShaderPack;
+import net.irisshaders.iris.shaderpack.materialmap.NamespacedId;
+import net.irisshaders.iris.shaderpack.programs.ProgramSet;
+import net.minecraft.util.Identifier;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Redirect;
+
+@Mixin(Iris.class)
+public class MixinIris {
+    @Redirect(method = "createPipeline", at = @At(value = "INVOKE", target = "Lnet/irisshaders/iris/shaderpack/ShaderPack;getProgramSet(Lnet/irisshaders/iris/shaderpack/materialmap/NamespacedId;)Lnet/irisshaders/iris/shaderpack/programs/ProgramSet;"))
+    private static ProgramSet voxy$redirectProgramSet(ShaderPack shaderPack, NamespacedId dim) {
+        try {
+            return shaderPack.getProgramSet(dim);
+        } catch (ShaderLoadError e) {
+            Logger.error(e);
+            return null;
+        }
+    }
+}

src/main/java/me/cortex/voxy/client/mixin/minecraft/MixinWorldRenderer.java

@@ -4,6 +4,7 @@ import me.cortex.voxy.client.VoxyClientInstance;
 import me.cortex.voxy.client.config.VoxyConfig;
 import me.cortex.voxy.client.core.IGetVoxyRenderSystem;
 import me.cortex.voxy.client.core.VoxyRenderSystem;
+import me.cortex.voxy.client.core.util.IrisUtil;
 import me.cortex.voxy.common.Logger;
 import me.cortex.voxy.common.world.WorldEngine;
 import me.cortex.voxy.commonImpl.VoxyCommon;
@@ -79,6 +80,14 @@ public abstract class MixinWorldRenderer implements IGetVoxyRenderSystem {
             Logger.error("Null world selected");
             return;
         }
-        this.renderer = new VoxyRenderSystem(world, instance.getThreadPool());
+        try {
+            this.renderer = new VoxyRenderSystem(world, instance.getThreadPool());
+        } catch (RuntimeException e) {
+            if (IrisUtil.irisShaderPackEnabled()) {
+                IrisUtil.disableIrisShaders();
+            } else {
+                throw e;
+            }
+        }
     }
 }

src/main/resources/client.voxy.mixins.json

@@ -9,6 +9,7 @@
     "iris.MixinPackRenderTargetDirectives",
     "iris.CustomUniformsAccessor",
     "iris.IrisRenderingPipelineAccessor",
+    "iris.MixinIris",
     "iris.MixinIrisRenderingPipeline",
     "iris.MixinIrisSamplers",
     "iris.MixinMatrixUniforms",