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methods::trySilent() is now a simple direct wrapper around tryCatch(), instead of building on try().
[Experimental] gzfile() can recognize and decompress files compressed by 'xz' if suitable OS support is found at configuration. Since gzfile() is widely used to read files, this means that for example load() can read files compressed by 'xv' (and it can save substantial amounts of space on large data files).
available.packages() gains a 'filters' argument for specifying the filtering operations performed on the packages found in the repositories. A new built-in 'license/FOSS' filter only retains packages for which installation can proceed solely based on packages which can be verified as Free or Open Source Software (FOSS) employing the available license specifications.
as.complex() sometimes warned about NAs on coercions and sometimes not (when the C function asComplex was used, e.g. on list elements). (PR#13942)
The libpng library has been updated to version 1.2.40.