Segfault on call to fread with fill = TRUE

[AndeolEvain]

I have a file that systematically makes R process crash when calling the following code :

dn1 <- data.table::fread("minimalEx.csv",
        sep = ",",
        quote = "\"",
        header = TRUE,
        fill = TRUE,
        stringsAsFactors = TRUE,
        integer64 = "numeric"
)

When trying to make a minimal example, I found that :
_ There seem to be a minimal number of lines (around 100+) for this crash to happen. Below this threshold, I simply get an error.
_ It is linked to non-escaped quotes, here in that last line of the file
_ It only happens with argument fill = TRUE

Here is the file reduced to a minimal example :
minimalEx.zip

This seems somwhat linked to the bug reported in # #3509, but the conditions of reproduction are a bit different.

[jangorecki]

Thank you for reporting. For completeness would be good to have your session info as well.

[AndeolEvain]

I was on R 3.6.3 (on windows 10). Then reproduced the same issue on R 3.5.3. I updated the data.table package when trying to find the minimal case (not sure what was the version before), so I now have the version 1.12.8.
My collegues also reproduced the issue with R3.6.0, and on Mac with R3.5.3, so it doesn't seem too system-dependant.