Navigation with nested NavGraph produces error

[Goregius]

Describe the bug
When using Compose multiplatform navigation, it seems that navigation with a nested NavGraph doesn't work and throws an error when trying to navigate to one.

Affected platforms

• Desktop (Windows)
• Web (K/Wasm) - Canvas based API

(I only tested these two)

Versions

• Kotlin version*: 2.0.0-RC1
• Compose Multiplatform version*: 1.6.10-dev1593
• Compose Navigation version: 2.8.0-alpha01
• OS version(s)* (required for Desktop and iOS issues): Windows 11
• OS architecture (x86 or arm64): x86
• JDK (for desktop issues): 17

To Reproduce
Steps and/or the code snippet to reproduce the behavior:

1. Use a navigation function to create a nested NavGraph and include a route which navigates to a sibling route. For example:

   NavHost(navController, startDestination = "subgraph") {
       navigation(startDestination = "a", route = "subgraph") {
           composable("a") {
               Button(onClick = { navController.navigate("b") }) {
                   Text("Navigate to route b")
               }
           }
           composable("b") {
               Text("Route b")
           }
       }
   }

2. Launch app and try to navigate to the sibling route.

3. A similar error to the following will occur:

Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: Navigation destination that matches route b cannot be found in the navigation graph ComposeNavGraph startDestination={ComposeNavGraph route=subgraph startDestination={Destination route=a}}

Expected behavior
The navigation should act as it would in Android, no error should occur.

[MatkovIvan]

Already fixed in JetBrains/compose-multiplatform-core#1277

Available in the latest dev build