fix: Prevent Manager from crashing when a patcher exception occurs and print its stack trace on installer's log

android/app/src/main/kotlin/app/revanced/manager/flutter/MainActivity.kt

@@ -74,7 +74,6 @@ class MainActivity : FlutterActivity() {
                         result.notImplemented()
                     }
                 }
-
                 else -> result.notImplemented()
             }
         }
@@ -101,6 +100,8 @@ class MainActivity : FlutterActivity() {
         val integrations = File(integrationsPath)
         val keyStoreFile = File(keyStoreFilePath)
 
+        Thread {
+            try {   
                 val patches = DexPatchBundle(
                     patchBundleFilePath,
                     DexClassLoader(
@@ -111,7 +112,6 @@ class MainActivity : FlutterActivity() {
                     )
                 ).loadPatches().filter { patch -> selectedPatches.any { it == patch.patchName } }
                 
-        Thread {
                 handler.post {
                     installerChannel.invokeMethod(
                         "update",
@@ -176,6 +176,7 @@ class MainActivity : FlutterActivity() {
                         )
                     )
                 }
+
                 patcher.addPatches(patches)
                 patcher.applyPatches().forEach { (patch, res) ->
                     if (res.isSuccess) {
@@ -252,10 +253,21 @@ class MainActivity : FlutterActivity() {
                         )
                     )
                 }
-
-            handler.post { result.success(null) }
+            } catch (ex: Throwable) {
+                val stack = ex.stackTraceToString()
+                handler.post {
+                    installerChannel.invokeMethod(
+                        "update",
+                        mapOf(
+                            "progress" to -100.0,
+                            "header" to "Aborting...",
+                            "log" to "An error occurred! Aborting\nError:\n$stack"
+                        )
+                    )
                 }
-            .start()
+            }
+            handler.post { result.success(null) }
+        }.start()
     }
 
     inner class ManagerLogger : Logger {

lib/ui/views/installer/installer_viewmodel.dart

@@ -78,14 +78,20 @@ class InstallerViewModel extends BaseViewModel {
   }
 
   void update(double value, String header, String log) {
-    if (value > 0) {
+    if (value >= 0.0) {
       progress = value;
     }
-    isPatching = progress == 1.0 ? false : true;
-    if (progress == 0.0) {
+    if (value == 0.0) {
       logs = '';
+      isPatching = true;
       isInstalled = false;
       hasErrors = false;
+    } else if (value == 1.0) {
+      isPatching = false;
+      hasErrors = false;
+    } else if (value == -100.0) {
+      isPatching = false;
+      hasErrors = true;
     }
     if (header.isNotEmpty) {
       headerLogs = header;
@@ -95,6 +101,9 @@ class InstallerViewModel extends BaseViewModel {
         logs += '\n';
       }
       logs += log;
+      if (logs[logs.length - 1] == '\n') {
+        logs = logs.substring(0, logs.length - 1);
+      }
       Future.delayed(const Duration(milliseconds: 500)).then((value) {
         scrollController.animateTo(
           scrollController.position.maxScrollExtent,
@@ -117,12 +126,14 @@ class InstallerViewModel extends BaseViewModel {
           _patches,
         );
       } catch (e) {
-        hasErrors = true;
-        update(-1.0, 'Aborting...', 'An error occurred! Aborting\nError: $e');
+        update(
+          -100.0,
+          'Aborting...',
+          'An error occurred! Aborting\nError:\n$e',
+        );
       }
     } else {
-      hasErrors = true;
-      update(-1.0, 'Aborting...', 'No app or patches selected! Aborting');
+      update(-100.0, 'Aborting...', 'No app or patches selected! Aborting');
     }
     if (FlutterBackground.isBackgroundExecutionEnabled) {
       try {
@@ -132,7 +143,6 @@ class InstallerViewModel extends BaseViewModel {
       }
     }
     await Wakelock.disable();
-    isPatching = false;
   }
 
   void installResult(BuildContext context, bool installAsRoot) async {