deconcat issue if string contains "])"

[zorrozww]

Hi
I got a issue about concat.
If there's "])" in my string, for example "(XXX[XXX])", I will get a java.lang.StringIndexOutOfBoundsException.
Call stack
com.gdevelop.gwt.syncrpc.SyncClientSerializationStreamReader.parse(SyncClientSerializationStreamReader.java:783) com.gdevelop.gwt.syncrpc.SyncClientSerializationStreamReader.prepareToRead(SyncClientSerializationStreamReader.java:797)

I checked code and find the root cause.
In function "deconcat" (line 509 in SyncClientSerializationStreamReader.java)
end = encoded.indexOf(POSTLUDE, start)
It's trying to find the "])" to match the "concat([".
But if there's "])" in my string, it will get wrong.
For example
[1,0...].concat([...],0,7])
If there's no "])" in [...], everything works well.
But if I got [1,0...].concat([..."(XXX[XXX])",...],0,7])
function deconcat will return the broken string and cause function parse failed with exception.

Regards,
Zorro