iOS TextField crash when using speech-to-text

[kodebach]

Describe the bug
When using the builtin iOS speech-to-text feature to enter text into a TextField the app crashes with a stack trace pointing to Compose Multiplatform.

Affected platforms

• iOS

Versions

• Kotlin version*: 1.9.22
• Compose Multiplatform version*: 1.6.0
• OS version(s)*: confirmed on iOS 15.8 and 17.3.1
• OS architecture: arm64
• Device: confirmed on iPhone 7 (iOS 15.8) and iPhone XR (iOS 17.3.1)

To Reproduce

1. Run an iOS app with a Compose Multiplatform TextField
2. Tap the TextField to bring up the keyboard
3. Tap the microphone icon to start speech-to-text
4. Say something and wait for speech-to-text recognition
5. App crashes

Expected behavior
No crash, and speech-to-text recognized text entered into TextField.

Additional context

It seems speech-to-text did work at some point: #2984

We have two similar but slightly different stack traces from production builds. The first one looks like this:

0   App             0x102e341d0 kfun:androidx.compose.ui.platform.toTextIterator#internal + 1040 (UIKitTextInputService.uikit.kt:0)
1   App             0x102e334a4 kfun:androidx.compose.ui.platform.UIKitTextInputService.object-2.isPositionAtBoundary#internal + 180 (UIKitTextInputService.uikit.kt:568)
2   App             0x102e57c78 kfun:androidx.compose.ui.platform.IOSSkikoInput#isPositionAtBoundary(kotlin.Int;platform.UIKit.UITextGranularity;kotlin.Long){}kotlin.Boolean-trampoline + 200 (IOSSkikoInput.uikit.kt:140)
3   App             0x102e57c78 kfun:androidx.compose.ui.window.IntermediateTextInputUIView.object-1.isPosition#internal + 492 (IntermediateTextInputUIView.uikit.kt:554)
4   App             0x1035def7c _6f72672e6a6574627261696e732e636f6d706f73652e75693a75692f6f70742f6275696c644167656e742f776f726b2f383339343731666333323931333563372f636f6d706f73652f75692f75692f7372632f75696b69744d61696e2f6b6f746c69... + 336
5   UIKitCore       0x184545094 +[UIDictationUtilities needsTrailingSpaceForPhrases:secureInput:] + 556 (UIDictationUtilities.m:388)
....

The second kind is almost identical, but the UIDictationUtilities method that calls into Compose is selectionStartInfoWithBlock instead.

In a debug build, we couldn't tell what UIKit method calls into Compose, but we found that a kotlin.NotImplementedError is thrown here:

https://github.com/JetBrains/compose-multiplatform-core/blob/99c5d1d3bd7eba7dbebcd42af0897f8862291822/compose/ui/ui/src/uikitMain/kotlin/androidx/compose/ui/platform/UIKitTextInputService.uikit.kt#L614

UITextGranularity.UITextGranularityParagraph -> TODO("UITextGranularityParagraph iterator")

Is there any way for us to work around this issue, or is speech-to-text broken until Compose Multiplatform implements these TODOs?

[igordmn]

Thanks!

@mazunin-v-jb, could you please help to reproduce it? I tried iOS Simulator 17.0, it doesn't crash

[jxdom]

I also encountered the same problem. When I use voice input, the iOS app crashes. I'm using iOS 17.4.