SET_NAMED a problem in devel branch?

[vjcitn]

Error in dyn.load(file, DLLpath = DLLpath, ...) : 
  unable to load shared object '/opt/R/devel/lib/R/library/Biostrings/libs/Biostrings.so':
  /opt/R/devel/lib/R/library/Biostrings/libs/Biostrings.so: undefined symbol: SET_NAMED
Calls: <Anonymous> ... asNamespace -> loadNamespace -> library.dynam -> dyn.load
Execution halted

I will try to get additional details

[vjcitn]

commenting out use of SET_NAMED in ‎src/SparseList_utils.c is sufficient to get compilation