fix(YouTube): Patched app crashes after first launch or clearing data

patches/src/main/kotlin/app/revanced/patches/youtube/utils/extension/SharedExtensionPatch.kt

@@ -2,8 +2,10 @@ package app.revanced.patches.youtube.utils.extension
 
 import app.revanced.patches.shared.extension.sharedExtensionPatch
 import app.revanced.patches.youtube.utils.extension.hooks.applicationInitHook
+import app.revanced.patches.youtube.utils.extension.hooks.mainActivityBaseContextHook
 
 // TODO: Move this to a "Hook.kt" file. Same for other extension hook patches.
 val sharedExtensionPatch = sharedExtensionPatch(
     applicationInitHook,
+    mainActivityBaseContextHook,
 )

patches/src/main/kotlin/app/revanced/patches/youtube/utils/extension/hooks/MainActivityBaseContextHook.kt

@@ -0,0 +1,35 @@
+package app.revanced.patches.youtube.utils.extension.hooks
+
+import app.revanced.patches.shared.extension.extensionHook
+import app.revanced.util.getReference
+import app.revanced.util.indexOfFirstInstructionOrThrow
+import com.android.tools.smali.dexlib2.iface.instruction.FiveRegisterInstruction
+import com.android.tools.smali.dexlib2.iface.reference.MethodReference
+
+private var attachBaseContextIndex = -1
+
+internal val mainActivityBaseContextHook = extensionHook(
+    insertIndexResolver = { method ->
+        attachBaseContextIndex = method.indexOfFirstInstructionOrThrow {
+            getReference<MethodReference>()?.name == "attachBaseContext"
+        }
+
+        attachBaseContextIndex + 1
+    },
+    contextRegisterResolver = { method ->
+        val overrideInstruction = method.implementation!!.instructions.elementAt(attachBaseContextIndex)
+                as FiveRegisterInstruction
+        "v${overrideInstruction.registerD}"
+    },
+) {
+    returns("V")
+    parameters("Landroid/content/Context;")
+    custom { method, classDef ->
+        method.name == "attachBaseContext" &&
+                (
+                        classDef.endsWith("/MainActivity;") ||
+                                // Old versions of YouTube called this class "WatchWhileActivity" instead.
+                                classDef.endsWith("/WatchWhileActivity;")
+                        )
+    }
+}

patches/src/main/kotlin/app/revanced/patches/youtube/video/playerresponse/PlayerResponseMethodHookPatch.kt

@@ -70,7 +70,7 @@ val playerResponseMethodHookPatch = bytecodePatch(
                 """
                     invoke-static {$registerVideoId, $registerPlayerParameter, $registerPlaylistId, $registerIsShortAndOpeningOrPlaying}, $hook
                     move-result-object $registerPlayerParameter
-            """,
+                    """,
             )
             numberOfInstructionsAdded += 2
         }