Fixed
Status Update
No update yet.
Comments
il...@google.com
ap...@google.com
Yigit, do you have time to fix it?
reemission of the same liveData is racy
reemission of the same liveData is racy
jb...@google.com
yea i'll take it.
jb...@google.com
xs...@gmail.com
Thanks for the detailed analysis. This may not be an issue anymore since we've started using Main.immediate there but I' not sure; I'll try to create a test case.
il...@google.com
just emitting same live data reproduces the issue.
@Test
fun raceTest() {
val subLiveData = MutableLiveData(1)
val subject = liveData(testScope.coroutineContext) {
emitSource(subLiveData)
emitSource(subLiveData) //crashes
}
subject.addObserver().apply {
testScope.advanceUntilIdle()
}
}
@Test
fun raceTest() {
val subLiveData = MutableLiveData(1)
val subject = liveData(testScope.coroutineContext) {
emitSource(subLiveData)
emitSource(subLiveData) //crashes
}
subject.addObserver().apply {
testScope.advanceUntilIdle()
}
}
xs...@gmail.com
With 2.2.0-alpha04 (that use Main.immediate), the issue seems to be still there (I tested it by calling emitSource() twice, like your test case)
Description
Version used: androidx.fragment:fragment-ktx:1.3.2
Devices/Android versions reproduced on: Google Pixel, API 29
As you can see from attached videos, hide transition doesn't work with a new state manager - fragment view just disappears immediately. Show transition from back stack works as expected in both cases.
This bug can be temporary "fixed" by using an old state manager:
FragmentManager.enableNewStateManager(false)