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‘as<-()’ avoids an infinite loop when a virtual class intercedes between a subclass and an actual superclass.
Fix level propagation in ‘unlist()’ when the list contains zero-length lists or factors.
Fix S3 dispatch on S4 objects when the methods package is not attached.
Internal S4 dispatch sets .Generic in the method frame for consistency with ‘standardGeneric()’ (PR#16929).
Fix ‘order(x, decreasing=TRUE)’ when ‘x’ is an integer vector containing ‘MAX_INT’. Ported from a fix Matt Dowle made to data.table.