Hi,
It is not critical but in case of coxph.null model (~1)
extractAIC function generates
Warning message:
In is.na(fit$coefficients) :
is.na() applied to non-(list or vector) of type 'NULL'
As I understand it happens because of absent coefficients attribute.
Function stats::
> Aaron Wells
> on Fri, 24 Nov 2017 12:46:48 +1300 writes:
> Hi, I think I've found a bug in R CMD INSTALL. When it tries to parse a
> DESCRIPTION file with an invalid LazyData field, it errors out while
> trying to print the correct error message:
>> R CMD INSTALL .