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#multiplatform
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# multiplatform
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Luoqiaoyou

03/13/2020, 8:27 AM
some strange errors in K/N target IOS string format. when i format string in this way:
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"id:$id,error:$error"
i got error in runtime.both of them are object pass by ios framework callback. the second way is fine：
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"id:" + id +",error:" + error
a

Artyom Degtyarev [JB]

03/13/2020, 8:28 AM
Hi! Can you share a code snippet?
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Luoqiaoyou

03/13/2020, 8:30 AM
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dispatch_async(dispatch_get_main_queue()) {
    wkWebview.evaluateJavaScript(";window.Native2JSBridge && Native2JSBridge._handleMessageFromApp($jsCode);") { id, error ->
        LogUtil.d("WebView", "id:$id,error:$error")
    }
}
inside the LogUtil.kt:
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actual fun d(tag: String, msg: String) {
    if (LOG_LEVEL > DEBUG) {
        return
    }
    NSLog("D/$tag : $msg")
}
the error occur on the NSLog call
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Artyom Degtyarev [JB]

03/13/2020, 8:37 AM
Thanks, can you extend the report with a crash log or something?
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Luoqiaoyou

03/13/2020, 8:58 AM
its magical. i recompile for give u the crash log. the error just gone🤣
🧙‍♂️ 1
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Artyom Degtyarev [JB]

03/13/2020, 9:02 AM
That’s fine, I also just build this code successfully. Just save the error code next time, okay? 🙂
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Luoqiaoyou

03/13/2020, 9:29 AM
again. not only this case. It will appear randomly wherever toString is used
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Artyom Degtyarev [JB]

03/13/2020, 9:50 AM
Okay, please try to list all details about the situation - what kotlin version are you using here? Is this appearing for simulator or device targets, is it a debug or release framework etc. IIRC, you can also copy complete stacktrace from Xcode. If it’s possible, post it here too.
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Luoqiaoyou

03/13/2020, 9:57 AM
simulator, debug, kotlin_version = '1.3.61', serialization_version = "0.14.0",i dont know how to get the stacktrace from Xcode, i just get this view
look like wild pointer
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Artyom Degtyarev [JB]

03/13/2020, 10:34 AM
Please try to get complete stack trace somehow like here. Also, it would be helpful to have a project shared - the last screen can possibly be a bug.
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Luoqiaoyou

03/15/2020, 7:54 AM
Is Kotlin/native toString() equal to Swift description? igot so many problem when i use JsonObject in kotlinx.serialization. idont know is my fault or the compiler or the serialization. Now all I can see is the .h file，i dont know how to debug it
I think the reason for the problem is that the compiler has a problem compiling JsonObject. Declare JsonObject as JsonElement type when used, and it now works https://github.com/Kotlin/kotlinx.serialization/issues/759
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