[GitHub] [cordova-plugin-media] baffalop opened a new issue #250: Native exception thrown when two media elements are playing on iOS

[GitBox <gi...@apache.org>]

baffalop opened a new issue #250: Native exception thrown when two media elements are playing on iOS
URL: https://github.com/apache/cordova-plugin-media/issues/250
 
 
   # Bug Report
   
   ## Problem
   
   There are moments in my app when two media elements overlap, both playing at the same time. If at this time I attempt to call methods `play`, `pause`, `getCurrentPosition` on one of the media instances, Safari console shows:
   
   ```
   exception nativeEvalAndFetch : ReferenceError: Can't find variable: nan (cordova.js:1509)
   ```
   
   Xcode shows:
   ```
   MyApp[6013:751153] *** WebKit discarded an uncaught exception in the webView:decidePolicyForNavigationAction:request:frame:decisionListener: delegate: <NSInvalidArgumentException> Invalid number value (NaN) in JSON write
   MyApp[6013:751153] exception nativeEvalAndFetch : ReferenceError: Can't find variable: nan
   ```
   
   As soon as I release one of these media instances (or when one of them is stopped - I release it as soon as it reaches the end) the methods called on the remaining instance behave correctly again.
   
   ### What is expected to happen?
   
   Normal execution of `play`, `pause` or `getCurrentPosition`.
   
   ### What does actually happen?
   
   Exception is logged. `pause` has no effect. `getCurrentPosition` does not call the callback. `play` restarts both media instances from the beginning.
   
   ### Environment, Platform, Device
   <!-- In what environment, on what platform or on which device are you experiencing the issue? -->
   
   
   Tested on iPhone 6 running iOS 12.4
   Also tested in emulator for iPhone XR
   
   ### Version information
   <!-- 
   What are relevant versions you are using?
   For example:
   Cordova: Cordova CLI, Cordova Platforms, Cordova Plugins 
   Other Frameworks: Ionic Framework and CLI version
   Operating System, Android Studio, Xcode etc.
   -->
   Cordova: 9.0.0 (cordova-lib@9.0.1)
   cordova-plugin-file 6.0.2 "File"
   cordova-plugin-media 5.0.3 "Media"
   cordova-plugin-music-controls 2.2.0 "MusicControls"
   cordova-plugin-splashscreen 5.0.3 "Splashscreen"
   cordova-plugin-whitelist 1.3.4 "Whitelist"
   
   Xcode: 10.3 (10G8)
   
   ## Checklist
   <!-- Please check the boxes by putting an x in the [ ] like so: [x] -->
   
   - [x] I searched for existing GitHub issues
   - [x] I updated all Cordova tooling to most recent version
   - [x] I included all the necessary information above
   

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