caught segfault error in R

In case anyone else has this problem or similar in the future, I sent a bug report to the package maintainer and he recommended uninstalling all installed packages and starting over. I took his advice and it worked!

I followed advice from this posting: http://r.789695.n4.nabble.com/Reset-R-s-library-to-base-packages-only-remove-all-installed-contributed-packages-td3596151.html

ip <- installed.packages()
pkgs.to.remove <- ip[!(ip[,"Priority"] %in% c("base", "recommended")), 1]
sapply(pkgs.to.remove, remove.packages)

This is not an answer to this question but it might be helpful for someone. (Inspired by user1310503. Thanks!)

I am working on a data.frame df with three cols: col1, col2, col3. Initially,

df =data.frame(col1=character(),col2=numeric(),col3=numeric(),stringsAsFactors = F)

In the process, rbind is used for many times, like:

aList<-list(col1="aaa", col2 = "123", col3 = "234")
dfNew <- as.data.frame(aList)
df <- rbind(df, dfNew)

At last, df is written to file via data.table::fwrite

data.table::fwrite(x = df, file = fileDF, append = FALSE, row.names = F, quote = F, showProgress = T)

df has 5973 rows and 3 cols. The "caught segfault" always occurs:

address 0x1, cause 'memory not mapped'.　

The solution to this problem is:

aList<-list(col1=as.character("aaa"), col2 = as.numeric("123"), col3 = as.numeric("234"))
dfNew <- as.data.frame(aList)
dfNew$col1 <- as.characer(dfNew$col1)
dfNew$col2 <- as.numeric(dfNew$col2)
dfNew$col3 <- as.numeric(dfNew$col3)
df <- rbind(df, dfNew)

Then this problem is solved. Possible reason is that the classes of cols are different.