[image_picker] Android: uncaught NullPointerException in FileUtils.copy when openInputStream returns null (process crash) #191988

Steps to reproduce

1. On Android, call ImagePicker().pickMultiImage() (or pickImage(source: ImageSource.gallery)), with or without useAndroidPhotoPicker.
2. Select an item whose content provider cannot serve its bytes when the result comes back: ContentResolver#openInputStream(uri) returns null for it. In the field this happens on some OEM providers (seen on a Xiaomi device running Android 10) for items the provider recently failed on, e.g. a cloud-only photo it could not fetch, or after the provider process crashed.

Expected results

The pick fails with the plugin's existing missing_valid_image_uri error (the same way a null URI does), and the app keeps running.

Actual results

The process dies. FileUtils.getPathFromUri opens the stream in a try-with-resources (a null resource is legal there), then hands it straight to copy():

java.lang.NullPointerException: Attempt to invoke virtual method 'int java.io.InputStream.read(byte[])' on a null object reference
  at io.flutter.plugins.imagepicker.FileUtils.copy (FileUtils.java:186)
  at io.flutter.plugins.imagepicker.FileUtils.getPathFromUri (FileUtils.java:83)
  at io.flutter.plugins.imagepicker.ImagePickerDelegate.getPathsFromIntent (ImagePickerDelegate.java:741)
  at io.flutter.plugins.imagepicker.ImagePickerDelegate.handleChooseMultiImageResult (ImagePickerDelegate.java:831)
  at io.flutter.plugins.imagepicker.ImagePickerDelegate.lambda$onActivityResult$1 (ImagePickerDelegate.java:692)
  at java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1167)

getPathFromUri catches IOException, SecurityException and IllegalArgumentException only, and the handler runs on the delegate's own executor thread, so the NPE is uncaught and takes the process down. The sibling case (a null URI) was fixed in flutter/packages#5009; the null stream right after it is still unguarded on main. A one-line null check returning null from getPathFromUri routes it onto the existing missing_valid_image_uri path.

Code sample

Any pickMultiImage() call; the trigger is the provider's behaviour, not app code.

Logs

See the stack trace above (from a Play Console crash report; image_picker_android 0.8.13+19, Android 10 / API 29).

Flutter Doctor output

Not environment-specific: the code path is identical on main (packages/image_picker/image_picker_android/android/src/main/java/io/flutter/plugins/imagepicker/FileUtils.java, getPathFromUri).