Created attachment 12434 [details]
When building a StackTrace object from an exception re-thrown by ExceptionDispatchInfo, the original exception stacktrace is gone even though it is included in the Exception. See simple repro attached. When running repro on windows, against the .net framework, the full stacktrace is available.
The repro is clearly not for XI because I don't have access to it at the moment, but it should be easy to adapt it :)
@Marek. this looks like something in the BCL.
Fixed in master and 4.2 branch