Repository navigation
[Bug]: PhonePermissionStrategy.checkServiceStatus calls completionHandler twice, causing crashes #1565
Description
Please check the following before submitting a new issue.
- I have searched the existing issues.
- I have carefully read the documentation and verified I have added the required platform specific configuration.
Please select affected platform(s)
- Android
- iOS
- Windows
Steps to reproduce
- Call
Permission.phone.serviceStatus(or anything that triggerscheckServiceStatusfor the phone permission) on a device/simulator where[[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:@"tel://"]]returnsNO(e.g. iPad, or a device without telephony capability). - In
PhonePermissionStrategy.m, theif (![app canOpenURL:telURL])branch callscompletionHandler(ServiceStatusNotApplicable)but does notreturn, so execution falls through and callscompletionHandler(...)a second time with the enabled/disabled status. - The Flutter method channel result callback backing
completionHandleris only expected to be invoked once; the second invocation raises an exception/crash.
We noticed this because checkServiceStatus/PhonePermissionStrategy shows up as one of the top crashes in our production consumer app in Firebase Crashlytics, affecting users on devices where canOpenURL: returns NO for tel://.
Expected results
completionHandler should be invoked exactly once per call to checkServiceStatus.
Actual results
completionHandler is invoked twice when the device cannot open tel:// URLs, which can crash the app.
Code sample
Code sample
// permission_handler_apple/ios/permission_handler_apple/Sources/permission_handler_apple/strategies/PhonePermissionStrategy.m
- (void)checkServiceStatus:(PermissionGroup)permission completionHandler:(ServiceStatusHandler)completionHandler {
UIApplication *app = [UIApplication sharedApplication];
NSURL *telURL = [NSURL URLWithString:@"tel://"];
if (![app canOpenURL:telURL]) {
completionHandler(ServiceStatusNotApplicable);
// missing `return;` here — falls through and calls completionHandler again below
}
completionHandler([self canDevicePlaceAPhoneCall] ? ServiceStatusEnabled : ServiceStatusDisabled);
}Screenshots or video
Screenshots or video demonstration
Crashlytics shows this as a top crash in our production app; no visual repro available since it's a native-side double-callback crash.
Version
9.6.1 (permission_handler_apple)
Flutter Doctor output
Doctor output
[✓] Flutter (Channel stable, 3.47.4, on macOS 26.6.2 25G83 darwin-arm64, locale en-ID) [2.1s]
• Flutter version 3.47.4 on channel stable at /Users/ryanaidilp/fvm/versions/3.47.0
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision 9584c6713b (6 days ago), 2026-09-10 15:25:10 -0700
• Engine revision 06a2e2a110
• Dart version 3.13.3
• DevTools version 2.60.0
• Feature flags: enable-web, enable-linux-desktop, enable-macos-desktop, enable-windows-desktop, enable-android, enable-ios, cli-animations, enable-native-assets,
enable-record-use, enable-swift-package-manager, omit-legacy-version-file, enable-lldb-debugging, enable-uiscene-migration
[✓] Android toolchain - develop for Android devices (Android SDK version 36.0.0) [1,082ms]
• Android SDK at Library/Android/sdk
• Emulator version 37.1.11.0 (build_id 15917651) (CL:N/A)
• Platform android-36, build-tools 36.0.0
• ANDROID_HOME = /Library/Android/sdk
• Java binary at: /Users/ryanaidilp/.sdkman/candidates/java/current/bin/java
This JDK is specified in your Flutter configuration.
To change the current JDK, run: `flutter config --jdk-dir="path/to/jdk"`.
• Java version OpenJDK Runtime Environment Temurin-17.0.4.1+1 (build 17.0.4.1+1)
• All Android licenses accepted.
[!] Xcode - develop for iOS and macOS (Xcode 27.0) [1,277ms]
• Xcode at /Applications/Xcode.app/Contents/Developer
• Build 27A266a
! iOS 27.0 Simulator not installed; this may be necessary for iOS and macOS development.
To download and install the platform, open Xcode, select Xcode > Settings > Components,
and click the GET button for the required platform.
For more information, please visit:
https://developer.apple.com/documentation/xcode/installing-additional-simulator-runtimes
• CocoaPods version 1.16.2
[✓] Chrome - develop for the web [7ms]
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] Connected device (2 available) [6.6s]
• macOS (desktop) • macos • darwin-arm64 • macOS 26.6.2 25G83 darwin-arm64
• Chrome (web) • chrome • web-javascript • Google Chrome 152.0.7977.84
[✓] Network resources [800ms]
• All expected network resources are available.
Activity