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[Blade player][v1.4.0.1] The app crashes when I tried to change the song after linking it with another by sagorahmed

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utopian-io · @sagorahmed ·
$12.23
[Blade player][v1.4.0.1] The app crashes when I tried to change the song after linking it with another
#### Project Information
* Repository: https://github.com/Valou3433/blade-player
* Project Name: Blade Player
* The submitted issue is [here](https://github.com/Valou3433/blade-player/issues/34)

#### Expected behavior
I expected that after linking a song to another, the song will stop playing. But this is not weirder than crashing the app by clicking on the next/previous button.

#### Actual behavior
The app crashes after I linked a song to another from the Artist folder and clicked on the previous/next track changer button of that song.


#### How to reproduce
**1.** Open the app and go to "Artists" folder.
**2.** Choose an artist and play a song from it.
**3.** Click on โ‹ฎ (Three dots/ Vertical ellipsis) at the right side of the song.
**4.** Then click "Link to"
**5.** Select a song from your local library. (The song will be successfully added to your chosen song & The song will still be playing in your player).
**6.** Open the current playing song page by tapping on its name. (At the downside of your display).
**7.** At last Click on the next button and notice the bug.

* App version: v1.4.0.1
* Operating system: Android 6.0.1

#### Recording Of The Bug
![bladebug](https://media.giphy.com/media/Y0yXzKuAYalCbXSYdm/giphy.gif)

#### GitHub Account
https://github.com/sagorahmed

#### Logcat
```
04-05 00:16:02.421 26140 26140 E AndroidRuntime: FATAL EXCEPTION: main

04-05 00:16:02.421 26140 26140 E AndroidRuntime: Process: v.blade, PID: 26140

04-05 00:16:02.421 26140 26140 E AndroidRuntime: java.lang.NullPointerException: Attempt to invoke virtual method 'v.blade.library.sources.Source v.blade.library.SongSources$SongSource.getSource()' on a null object reference

04-05 00:16:02.421 26140 26140 E AndroidRuntime: 	at v.blade.player.PlayerMediaPlayer.playSong(PlayerMediaPlayer.java:252)

04-05 00:16:02.421 26140 26140 E AndroidRuntime: 	at v.blade.player.PlayerService$2.onSkipToNext(PlayerService.java:157)

04-05 00:16:02.421 26140 26140 E AndroidRuntime: 	at android.support.v4.media.session.MediaSessionCompat$Callback$StubApi21.onSkipToNext(MediaSessionCompat.java:1284)

04-05 00:16:02.421 26140 26140 E AndroidRuntime: 	at android.support.v4.media.session.MediaSessionCompatApi21$CallbackProxy.onSkipToNext(MediaSessionCompatApi21.java:219)

04-05 00:16:02.421 26140 26140 E AndroidRuntime: 	at android.media.session.MediaSession$CallbackMessageHandler.handleMessage(MediaSession.java:1228)

04-05 00:16:02.421 26140 26140 E AndroidRuntime: 	at android.os.Handler.dispatchMessage(Handler.java:102)

04-05 00:16:02.421 26140 26140 E AndroidRuntime: 	at android.os.Looper.loop(Looper.java:148)

04-05 00:16:02.421 26140 26140 E AndroidRuntime: 	at android.app.ActivityThread.main(ActivityThread.java:7325)

04-05 00:16:02.421 26140 26140 E AndroidRuntime: 	at java.lang.reflect.Method.invoke(Native Method)

04-05 00:16:02.421 26140 26140 E AndroidRuntime: 	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
```
๐Ÿ‘  , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , and 83 others
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vote details (147)
@steem-ua · 
#### Hi @sagorahmed!

Your post was upvoted by @steem-ua, new Steem dApp, using UserAuthority for algorithmic post curation!
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@tobias-g ·
$6.48
Thanks for your contribution @sagorahmed

Once again, your steps were very clear and it was extremely easy to replicate, nice work. Overall I believe this issue will affect less users than the one previously mentioned, hence my view on severity, however this was great report and very easy to follow. 

I didn't mention before but it's great to see that you're both reporting and including log-cats, this is great. 

I can see from the comments that project owner has acknowledged and chosen a path forward surrounding this issue based on your report, good work. 

Once again, thanks for your contribution and look forward to seeing more from you soon. 

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Your contribution has been evaluated according to [Utopian policies and guidelines](https://join.utopian.io/guidelines), as well as a predefined set of questions pertaining to the category.

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๐Ÿ‘  , , , , , , , , , , , , , , , ,
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vote details (17)
@utopian-io · 
Thank you for your review, @tobias-g! Keep up the good work!
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@utopian-io · 
Hey, @sagorahmed!

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