`MalformedJsonException: Unterminated string` occurs infrequently

[gbakeman]

Checklist

• I've already searched in existing issues and haven't found a similar problem reported.
• I'm using the latest version of the app
• This error caused the app to crash
• This error is reproducible

Which category best fits this error?

Feed Sync

App version

0.16.1

Reproduction steps

Unclear how to reproduce, happens infrequently and typically with the app in background and/or screen off. Syncing to FreshRSS server 1.28.1. Hopefully easy enough to catch exceptions like this and implement further functionality to troubleshoot incomplete/corrupt streams of data.

Crash report

Device: OnePlus ONEPLUS A6013
System: Android 9 (API 28)

Stack trace: 

.google.gson.JsonSyntaxException: com.google.gson.stream.MalformedJsonException: Unterminated string at line 1 column 3 path $.
	at com.google.gson.Gson.fromJson(Gson.java:22)
	at me.ash.reader.domain.data.DiffMapHolder$commitDiffsFromCache$1.invokeSuspend(DiffMapHolder.kt:66)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:9)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:112)
	at kotlinx.coroutines.internal.LimitedDispatcher$Worker.run(LimitedDispatcher.kt:8)
	at kotlinx.coroutines.scheduling.TaskImpl.run(Tasks.kt:3)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:93)
	Suppressed: kotlinx.coroutines.internal.DiagnosticCoroutineContextException: [StandaloneCoroutine{Cancelling}@1bac0be, Dispatchers.IO]
Caused by: com.google.gson.stream.MalformedJsonException: Unterminated string at line 1 column 3 path $.
	at com.google.gson.stream.JsonReader.syntaxError(JsonReader.java:18)
	at com.google.gson.stream.JsonReader.nextQuotedValue(JsonReader.java:124)
	at com.google.gson.stream.JsonReader.nextString(JsonReader.java:35)
	at com.google.gson.internal.bind.TypeAdapters$15.read(TypeAdapters.java:27)
	at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.read(MapTypeAdapterFactory.java:104)
	at com.google.gson.Gson.fromJson(Gson.java:18)
	... 6 more