[Android] A resource failed to call close.

[GeorgeKamal]

Describe the bug
After picking a file, I get this message in my terminal. I don't know how much should I worry about it (potential memory leaks?). Unfortunately, I am not sure what exactly in the file picker package causes it beacuse I don't always getting after picking a file. The file is loaded correctly, regardless of this message.
Message: System: A resource failed to call close
After executing: await FilePicker.platform.pickFiles(...)

Platform

• Android

Platform OS version
Android 15 (SDK 35) running on emulator.

How are you picking?

Future<void> importData() async {
-->FilePickerResult? result = await FilePicker.platform.pickFiles(type: FileType.custom, allowedExtensions: Constants.extensions); <-- from this line
    if (result != null) {
      try {
        File file = File(result.files.single.path!);
        String importedJsonString = file.readAsStringSync();
        // rest of code
    }
}

Error Log

D/FilePickerUtils( 7466): Allowed file extensions mimes: [application/json]
D/FilePickerDelegate( 7466): Selected type */*
D/VRI[MainActivity]( 7466): visibilityChanged oldVisibility=true newVisibility=false
I/FilePickerUtils( 7466): Caching from URI: content://com.android.providers.downloads.documents/document/35
D/FilePickerUtils( 7466): File loaded and cached at:/data/user/0/com.x.y/cache/file_picker/1738677098890/data_30-01-2025_1903.json
D/FilePickerDelegate( 7466): File path:[com.mr.flutter.plugin.filepicker.FileInfo@6787436]
I/com.x.y( 7466): Background concurrent mark compact GC freed 1097KB AllocSpace bytes, 66(3432KB) LOS objects, 49% free, 3144KB/6288KB, paused 25.166ms,11.036ms total 394.245ms
D/StrictMode( 7466): StrictMode policy violation: android.os.strictmode.LeakedClosableViolation: A resource was acquired at attached stack 
trace but never released. See java.io.Closeable for information on avoiding resource leaks.
D/StrictMode( 7466):    at android.os.StrictMode$AndroidCloseGuardReporter.report(StrictMode.java:2011)
D/StrictMode( 7466):    at dalvik.system.CloseGuard.warnIfOpen(CloseGuard.java:336)
D/StrictMode( 7466):    at java.io.FileOutputStream.finalize(FileOutputStream.java:560)
D/StrictMode( 7466):    at java.lang.Daemons$FinalizerDaemon.doFinalize(Daemons.java:370)
D/StrictMode( 7466):    at java.lang.Daemons$FinalizerDaemon.processReference(Daemons.java:350)
D/StrictMode( 7466):    at java.lang.Daemons$FinalizerDaemon.runInternal(Daemons.java:322)
D/StrictMode( 7466):    at java.lang.Daemons$Daemon.run(Daemons.java:131)
D/StrictMode( 7466):    at java.lang.Thread.run(Thread.java:1012)
D/StrictMode( 7466): Caused by: java.lang.Throwable: Explicit termination method 'close' not called
D/StrictMode( 7466):    at dalvik.system.CloseGuard.openWithCallSite(CloseGuard.java:288)
D/StrictMode( 7466):    at dalvik.system.CloseGuard.open(CloseGuard.java:257)
D/StrictMode( 7466):    at java.io.FileOutputStream.<init>(FileOutputStream.java:275)
D/StrictMode( 7466):    at java.io.FileOutputStream.<init>(FileOutputStream.java:147)
D/StrictMode( 7466):    at com.mr.flutter.plugin.filepicker.FileUtils.openFileStream(FileUtils.java:300)
D/StrictMode( 7466):    at com.mr.flutter.plugin.filepicker.FilePickerDelegate$1.run(FilePickerDelegate.java:157)
D/StrictMode( 7466):    ... 1 more
D/StrictMode( 7466): StrictMode policy violation: android.os.strictmode.LeakedClosableViolation: A resource was acquired at attached stack 
trace but never released. See java.io.Closeable for information on avoiding resource leaks.
D/StrictMode( 7466):    at android.os.StrictMode$AndroidCloseGuardReporter.report(StrictMode.java:2011)
D/StrictMode( 7466):    at dalvik.system.CloseGuard.warnIfOpen(CloseGuard.java:336)
D/StrictMode( 7466):    at android.util.CloseGuard.warnIfOpen(CloseGuard.java:170)
D/StrictMode( 7466):    at android.os.ParcelFileDescriptor.finalize(ParcelFileDescriptor.java:1121)
D/StrictMode( 7466):    at java.lang.Daemons$FinalizerDaemon.doFinalize(Daemons.java:370)
D/StrictMode( 7466):    at java.lang.Daemons$FinalizerDaemon.processReference(Daemons.java:350)
D/StrictMode( 7466):    at java.lang.Daemons$FinalizerDaemon.runInternal(Daemons.java:322)
D/StrictMode( 7466):    at java.lang.Daemons$Daemon.run(Daemons.java:131)
D/StrictMode( 7466):    at java.lang.Thread.run(Thread.java:1012)
D/StrictMode( 7466): Caused by: java.lang.Throwable: Explicit termination method 'close' not called
D/StrictMode( 7466):    at dalvik.system.CloseGuard.openWithCallSite(CloseGuard.java:288)
D/StrictMode( 7466):    at dalvik.system.CloseGuard.open(CloseGuard.java:257)
D/StrictMode( 7466):    at android.util.CloseGuard.open(CloseGuard.java:153)
D/StrictMode( 7466):    at android.os.ParcelFileDescriptor.<init>(ParcelFileDescriptor.java:216)
D/StrictMode( 7466):    at android.os.ParcelFileDescriptor$2.createFromParcel(ParcelFileDescriptor.java:1181)
D/StrictMode( 7466):    at android.os.ParcelFileDescriptor$2.createFromParcel(ParcelFileDescriptor.java:1172)
D/StrictMode( 7466):    at android.content.res.AssetFileDescriptor.<init>(AssetFileDescriptor.java:708)
D/StrictMode( 7466):    at android.content.res.AssetFileDescriptor$1.createFromParcel(AssetFileDescriptor.java:721)
D/StrictMode( 7466):    at android.content.res.AssetFileDescriptor$1.createFromParcel(AssetFileDescriptor.java:719)
D/StrictMode( 7466):    at android.content.ContentProviderProxy.openTypedAssetFile(ContentProviderNative.java:817)
D/StrictMode( 7466):    at android.content.ContentResolver.openTypedAssetFileDescriptor(ContentResolver.java:2043)
D/StrictMode( 7466):    at android.content.ContentResolver.openAssetFileDescriptor(ContentResolver.java:1858)
D/StrictMode( 7466):    at android.content.ContentResolver.openInputStream(ContentResolver.java:1528)
D/StrictMode( 7466):    at com.mr.flutter.plugin.filepicker.FileUtils.openFileStream(FileUtils.java:303)
D/StrictMode( 7466):    at com.mr.flutter.plugin.filepicker.FilePickerDelegate$1.run(FilePickerDelegate.java:157)
D/StrictMode( 7466):    ... 1 more

Flutter Version details

flutter doctor -v
[√] Flutter (Channel stable, 3.27.0, on Microsoft Windows [Version 10.0.19045.5371], locale en-GB)
    • Flutter version 3.27.0 on channel stable at C:\Users\#####\AppData\Local\FlutterSDK
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 8495dee1fd (8 weeks ago), 2024-12-10 14:23:39 -0800
    • Engine revision 83bacfc525
    • Dart version 3.6.0
    • DevTools version 2.40.2

[☠] Windows Version (the doctor check crashed)
    X Due to an error, the doctor check did not complete. If the error message below is not helpful, please let us know about this issue at      https://github.com/flutter/flutter/issues.
    X Error: Flutter failed to run "powershell -command Get-Process | Format-List Path". The flutter tool cannot access the file or        
      directory.
      Please ensure that the SDK and/or project is installed in a location that has read/write permissions for the current user.
    • #0      throwToolExit (package:flutter_tools/src/base/common.dart:10:3)
      #1      _throwFileSystemException (package:flutter_tools/src/base/error_handling_io.dart:856:3)
      #2      _handleWindowsException (package:flutter_tools/src/base/error_handling_io.dart:846:3)
      #3      _run (package:flutter_tools/src/base/error_handling_io.dart:584:7)
      <asynchronous suspension>
      #4      WindowsVersionValidator._topazScan (package:flutter_tools/src/windows/windows_version_validator.dart:40:48)
      <asynchronous suspension>
      #5      WindowsVersionValidator.validate (package:flutter_tools/src/windows/windows_version_validator.dart:81:9)
      <asynchronous suspension>
      #6      Future.any.onValue (dart:async/future.dart:614:5)
      <asynchronous suspension>


[!] Android toolchain - develop for Android devices (Android SDK version 35.0.0)
    • Android SDK at C:\Users\#####\AppData\Local\Android\Sdk
    • Platform android-35, build-tools 35.0.0
    • ANDROID_HOME = C:\Users\#####\AppData\Local\Android\Sdk
    • Java binary at: C:\Program Files\Android\Android Studio\jbr\bin\java
    • Java version OpenJDK Runtime Environment (build 17.0.10+0--11609105)
    ! Some Android licenses not accepted. To resolve this, run: flutter doctor --android-licenses

[√] Chrome - develop for the web
    • Chrome at C:\Program Files\Google\Chrome\Application\chrome.exe

[!] Visual Studio - develop Windows apps (Visual Studio Community 2022 17.7.1)
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    • Visual Studio Community 2022 version 17.7.34009.444
    • Windows 10 SDK version 10.0.22621.0
    X The current Visual Studio installation is incomplete.
      Please use Visual Studio Installer to complete the installation or reinstall Visual Studio.

[√] Android Studio (version 2024.1)
    • Android Studio at C:\Program Files\Android\Android Studio
    • Flutter plugin can be installed from:
       https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
       https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 17.0.10+0--11609105)

[√] VS Code (version 1.96.2)
    • VS Code at C:\Users\#####\AppData\Local\Programs\Microsoft VS Code
    • Flutter extension version 3.102.0

[√] Connected device (4 available)
    • sdk gphone64 x86 64 (mobile) • emulator-5554 • android-x64    • Android 15 (API 35) (emulator)
    • Windows (desktop)            • windows       • windows-x64    • Microsoft Windows [Version 10.0.19045.5371]
    • Chrome (web)                 • chrome        • web-javascript • Google Chrome 132.0.6834.160
    • Edge (web)                   • edge          • web-javascript • Microsoft Edge 132.0.2957.140

[√] Network resources
    • All expected network resources are available.

! Doctor found issues in 3 categories.