Dear all,
I have just installed the current R development version to verify whether my package works on the newest R release and I've encountered an issue when combining RangedData/IRanges objects.
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			 library(IRanges) c(IRanges(), IRanges()) c(RangedData(), RangedData()) 
 The RangedData doc says Note that the use of ‘RangedData’ and ‘RangedDataList’ objects has so I guess that everyone switch to GRanges now. In this case, could you output a deprecation warning somehow? 
 Thanks for clarification and best  | 
		
Matthias

I'm guessing something in your package library is out of sync. Might try reinstalling IRanges or its dependencies.
I just switched to GRanges() and the problem persists. I already reinstalled IRanges and the current version seems to be loaded. Here's my session - thanks for having a look :-)
Best
Matthias