Help to fix the problem below:

> biocLite(c("GEOquery"))
BioC_mirror: https://bioconductor.org
Using Bioconductor 3.5 (BiocInstaller 1.26.0), R 3.4.0
  (2017-04-21).
Installing package(s) ‘GEOquery’
Error in if (file.exists(dest) && file.mtime(dest) > file.mtime(lib) &&  : 
  missing value where TRUE/FALSE needed

This (the Error: message) is a bug in R 3.4 most easily solved by updating R to the patched version.