Espresso.onIdle() return error java.lang.IndexOutOfBoundsException: Index: 1, Size: 1

Question

After updating Kotlin to 2.2.0, my autotest started failing on the start screen with the following error in Espresso class on compose view:

java.lang.IndexOutOfBoundsException: Index: 1, Size: 1

However, my autotest does not use any indexing operations. and this issue is not related to the UI. I also noticed that the application now loads more slowly. As a result, the autotest begins its checks before the app is fully loaded. Previously, this wasn’t a problem—the test would pass thanks to the built-in waits. text error:

java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.IndexOutOfBoundsException: Index: 1, Size: 1
at androidx.test.espresso.Espresso.onIdle(Espresso.java:357)
at androidx.test.espresso.Espresso.onIdle(Espresso.java:378)
at androidx.compose.ui.test.EspressoLink_androidKt.runEspressoOnIdle(EspressoLink.android.kt:88)
at androidx.compose.ui.test.EspressoLink.runUntilIdle(EspressoLink.android.kt:82)
at androidx.compose.ui.test.AndroidComposeUiTestEnvironment.waitForIdle(ComposeUiTest.android.kt:596)
at androidx.compose.ui.test.AndroidComposeUiTestEnvironment.access$waitForIdle(ComposeUiTest.android.kt:391)
at androidx.compose.ui.test.AndroidComposeUiTestEnvironment$AndroidTestOwner.getRoots(ComposeUiTest.android.kt:822)
at androidx.compose.ui.test.TestOwnerKt.getAllSemanticsNodes(TestOwner.kt:81)
at androidx.compose.ui.test.SemanticsNodeInteraction.fetchSemanticsNodes$ui_test_release(SemanticsNodeInteraction.kt:64)
at androidx.compose.ui.test.SemanticsNodeInteraction.fetchSemanticsNodes$ui_test_release$default(SemanticsNodeInteraction.kt:59)
at androidx.compose.ui.test.AndroidAssertions_androidKt.checkIsDisplayed(AndroidAssertions.android.kt:29)
at androidx.compose.ui.test.AssertionsKt.isDisplayed(Assertions.kt:351)
at androidx.compose.ui.test.AssertionsKt.assertIsDisplayed(Assertions.kt:33)
at io.github.kakaocup.compose.node.assertion.NodeAssertions$assertIsDisplayed$1.invoke(NodeAssertions.kt:13)
at io.github.kakaocup.compose.node.assertion.NodeAssertions$assertIsDisplayed$1.invoke(NodeAssertions.kt:13)
.......

This happened after updating androidx.compose:compose-bom:2025.09.01 — Red Cape
– Red Cape, Commented Nov 4 at 8:39
Do you happen to be using a LazyList/LazyGrid in the start screen? There appears to be a known bug from UI testing especially with a custom scroll to a specific item — Edric
– Edric, Commented Nov 5 at 7:44
You could try adding the standard test dispatcher to your Compose JUnit 4 rule as mentioned in the 9th comment of that issue (i.e. @get:Rule val rule = createComposeRule(StandardTestDispatcher())) — Edric
– Edric, Commented Nov 5 at 7:46
Also, that bug fix appears to have landed in Compose Foundation 1.10.0-beta01 (source: checked manually in the IDE) so you might want to try using that version — Edric
– Edric, Commented Nov 5 at 7:48
Upgrading the androidx-compose-foundation version to 1.10.0-beta01 actually helped. I’m not sure if the developers will allow me to use a beta version, but thank you! Do you know if there is any article about this issue? — Red Cape
– Red Cape, Commented Nov 6 at 7:50

Red Cape · Accepted Answer · 2025-11-06 07:50:59Z

0

Upgrading the androidx-compose-foundation version to 1.10.0-beta01 actually helped. I’m not sure if the developers will allow me to use a beta version, but thank you!
Do you know if there is any article about this issue?

answered Nov 6 at 7:50

Red Cape

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Community Nov 6 at 16:06

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