Briefly: it looks like R 3.6.0 wants to install dplyr from source, and won't install from the binary package cache. Compilation + installation fails due to lack of memory on the free tier of RStudio Cloud (1GB).
The thread linked above says this issue should be fixed. But I'm still experiencing it, even after deleting and re-creating my project.
g++: internal compiler error: Killed (program cc1plus)
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-5/README.Bugs> for instructions.
make: *** [mutate.o] Error 4
/opt/R/3.6.0/lib/R/etc/Makeconf:176: recipe for target 'mutate.o' failed
ERROR: compilation failed for package ‘dplyr’
* removing ‘/home/rstudio-user/R/x86_64-pc-linux-gnu-library/3.6/dplyr’
Warning in install.packages :
installation of package ‘dplyr’ had non-zero exit status
The previous working version compiled for 3.6.0 that was available in mid-May should still be in the package cache, even if a new dplyr version was released recently (which could take a few days to make it into the cache). Right?
Because of the holiday, we had a bit of extra sluggishness in ensuring dplyr 0.8.3 hit the package cache. It is now cached, so a new install.packages('dplyr') should result in pulling the cached binary and successful use of dpylr!