Fixed
Status Update
Comments
il...@google.com <il...@google.com>
ap...@google.com <ap...@google.com> #2
Yigit, do you have time to fix it?
reemission of the same liveData is racy
reemission of the same liveData is racy
ap...@google.com <ap...@google.com> #3
yea i'll take it.
ap...@google.com <ap...@google.com> #4
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.
ap...@google.com <ap...@google.com> #5
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()
}
}
ap...@google.com <ap...@google.com> #6
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)
ap...@google.com <ap...@google.com> #7
yea sorry immediate does not fix it.
I actually have a WIP fix for it:
https://android-review.googlesource.com/c/platform/frameworks/support/+/1112186
if your case is the one i found (emitting same LiveData multiple times, as shown in #5) you can work around it by adding a dummy transformation.
val subLiveData = MutableLiveData(1)
val subject = liveData(testScope.coroutineContext) {
emitSource(subLiveData.map {it })
emitSource(subLiveData.map {it} )
}
I actually have a WIP fix for it:
if your case is the one i found (emitting same LiveData multiple times, as shown in #5) you can work around it by adding a dummy transformation.
val subLiveData = MutableLiveData(1)
val subject = liveData(testScope.coroutineContext) {
emitSource(subLiveData.map {it })
emitSource(subLiveData.map {it} )
}
jb...@google.com <jb...@google.com> #8
Project: platform/frameworks/support
Branch: androidx-master-dev
commit af12e75e6b4110f48e44ca121466943909de8f06
Author: Yigit Boyar <yboyar@google.com>
Date: Tue Sep 03 12:58:11 2019
Fix coroutine livedata race condition
This CL fixes a bug in liveData builder where emitting same
LiveData source twice would make it crash because the second
emission registry could possibly happen before first one is
removed as source.
We fix it by using a suspending dispose function. It does feel
a bit hacky but we cannot make DisposableHandle.dispose async
and we do not want to block there. This does not mean that there
is a problem if developer disposes it manually since our emit
functions take care of making sure it disposes (and there is
no other way to add source to the underlying MediatorLiveData)
Bug: 140249349
Test: BuildLiveDataTest#raceTest_*
Change-Id: I0b464c242a583da4669af195cf2504e2adc4de40
M lifecycle/lifecycle-livedata-ktx/api/2.2.0-alpha05.txt
M lifecycle/lifecycle-livedata-ktx/api/current.txt
M lifecycle/lifecycle-livedata-ktx/api/public_plus_experimental_2.2.0-alpha05.txt
M lifecycle/lifecycle-livedata-ktx/api/public_plus_experimental_current.txt
M lifecycle/lifecycle-livedata-ktx/api/restricted_2.2.0-alpha05.txt
M lifecycle/lifecycle-livedata-ktx/api/restricted_current.txt
M lifecycle/lifecycle-livedata-ktx/src/main/java/androidx/lifecycle/CoroutineLiveData.kt
M lifecycle/lifecycle-livedata-ktx/src/test/java/androidx/lifecycle/BuildLiveDataTest.kt
https://android-review.googlesource.com/1112186
https://goto.google.com/android-sha1/af12e75e6b4110f48e44ca121466943909de8f06
Branch: androidx-master-dev
commit af12e75e6b4110f48e44ca121466943909de8f06
Author: Yigit Boyar <yboyar@google.com>
Date: Tue Sep 03 12:58:11 2019
Fix coroutine livedata race condition
This CL fixes a bug in liveData builder where emitting same
LiveData source twice would make it crash because the second
emission registry could possibly happen before first one is
removed as source.
We fix it by using a suspending dispose function. It does feel
a bit hacky but we cannot make DisposableHandle.dispose async
and we do not want to block there. This does not mean that there
is a problem if developer disposes it manually since our emit
functions take care of making sure it disposes (and there is
no other way to add source to the underlying MediatorLiveData)
Bug: 140249349
Test: BuildLiveDataTest#raceTest_*
Change-Id: I0b464c242a583da4669af195cf2504e2adc4de40
M lifecycle/lifecycle-livedata-ktx/api/2.2.0-alpha05.txt
M lifecycle/lifecycle-livedata-ktx/api/current.txt
M lifecycle/lifecycle-livedata-ktx/api/public_plus_experimental_2.2.0-alpha05.txt
M lifecycle/lifecycle-livedata-ktx/api/public_plus_experimental_current.txt
M lifecycle/lifecycle-livedata-ktx/api/restricted_2.2.0-alpha05.txt
M lifecycle/lifecycle-livedata-ktx/api/restricted_current.txt
M lifecycle/lifecycle-livedata-ktx/src/main/java/androidx/lifecycle/CoroutineLiveData.kt
M lifecycle/lifecycle-livedata-ktx/src/test/java/androidx/lifecycle/BuildLiveDataTest.kt
ap...@google.com <ap...@google.com> #9
Project: platform/frameworks/support
Branch: androidx-main
commit 2a78a49583442afe6872e72d1b822b0f4244ddb7
Author: Jeremy Woods <jbwoods@google.com>
Date: Mon Apr 12 10:57:31 2021
Making truth, testing, and utils depend on base modules
Since all of navigation is now in kotlin and the -ktx modules are empty,
we should switch all modules to depend directly on the base module.
Also changed all the modules that use internal-testutils-navigation to
exclude navigation-common base module instead of the ktx.
RelNote: "The Navigation Testing and Navigation Test modules now depend
on the base Navigation modules instead of the empty -ktx modules."
Test: all tests pass
Bug: 184292145
Change-Id: I1b5f5cdb63ae1912cbd9ffb0dbbdc44664fd179a
M hilt/hilt-navigation-fragment/build.gradle
M navigation/integration-tests/testapp/build.gradle
M navigation/navigation-compose/build.gradle
M navigation/navigation-fragment/build.gradle
M navigation/navigation-runtime-truth/build.gradle
M navigation/navigation-testing/build.gradle
M navigation/navigation-ui/build.gradle
M testutils/testutils-navigation/build.gradle
https://android-review.googlesource.com/1673529
Branch: androidx-main
commit 2a78a49583442afe6872e72d1b822b0f4244ddb7
Author: Jeremy Woods <jbwoods@google.com>
Date: Mon Apr 12 10:57:31 2021
Making truth, testing, and utils depend on base modules
Since all of navigation is now in kotlin and the -ktx modules are empty,
we should switch all modules to depend directly on the base module.
Also changed all the modules that use internal-testutils-navigation to
exclude navigation-common base module instead of the ktx.
RelNote: "The Navigation Testing and Navigation Test modules now depend
on the base Navigation modules instead of the empty -ktx modules."
Test: all tests pass
Bug: 184292145
Change-Id: I1b5f5cdb63ae1912cbd9ffb0dbbdc44664fd179a
M hilt/hilt-navigation-fragment/build.gradle
M navigation/integration-tests/testapp/build.gradle
M navigation/navigation-compose/build.gradle
M navigation/navigation-fragment/build.gradle
M navigation/navigation-runtime-truth/build.gradle
M navigation/navigation-testing/build.gradle
M navigation/navigation-ui/build.gradle
M testutils/testutils-navigation/build.gradle
Description
Merge navigation-ktx extensions into the main library. In particular this will help avoid having duplicate file names such as
androidx/navigation/NavGraph.kt