Hi. I'm getting the following error, both on node ...

# javascript

[Felix]

Hi. I'm getting the following error, both on node and browser tests

IrLinkageError: Function 'synchronized' can not be called: No function found for symbol 'kotlinx.coroutines.internal/synchronized|-6007400717330569213[0]'
	at <global>.throwLinkageError(REMOVED/compileSync/js/test/testDevelopmentExecutable/kotlin/js/runtime/unlinked.kt:11)
	at TestScopeImpl.protoOf.enter_h49n20(/mnt/agent/work/44ec6e850d5c63f0/kotlinx-coroutines-test/common/src/TestScope.kt:224)
	at <global>.runTest(/mnt/agent/work/44ec6e850d5c63f0/kotlinx-coroutines-test/common/src/TestBuilders.kt:307)

The used kotlinx-coroutines-test was upgraded from 1.7.3 to 1.9.0, due to the upgrade of ktor to 3.0.0
• What can be causing this?
• I noticed that synchronised uses synchronizedImpl, which is an expect function. This function is not defined on the js target, but seems to be on the jsAndWasmShared

[broadway_lamb]

Hi! Was the synchronized called from your project or from some of its dependencies?

[Felix]

I believe it is from TestScope
The stack trace starts at one of my tests, in the runTest call, then goes into TestBuilders.kt and into TestScope.kt, which uses the synchronized function (I peeked at the source code for it).

[broadway_lamb]

And does your project explicitly depend on both ktor and kotlinx-coroutines-test?

[Felix]

It depends on both.

[Felix]

I have direct dependencies for both kotlinx-coroutines-core:1.7.3 and kotlinx-coroutines-test:1.7.3

[Felix]

And for ktor:3.0.0

[broadway_lamb]

I see. This looks like a bug. Could you please file an issue? kotl.in/issue
If possible, please attach your project or at least the test file from which you call runTest.

[Felix]

Unfortunately I cannot attach the project neither the test file. But it is a simple usage of runTest.
In the meanwhile, I changed my direct dependencies of kotlinx-coroutines-* to use 1.9.0 instead of 1.7.3 and the problem went away.

[Felix]

Thanks for the help.