fread does not correctly recover a file with quotes saved using fwrite

[valentas-kurauskas]

> library(data.table)
> a<-data.table(a=c("\"A\""))
> a
     a
1: "A"
> fwrite(a, "a.csv")
> fread("a.csv")
       a
1: ""A""

# Output of sessionInfo()

R version 3.4.4 (2018-03-15)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Ubuntu 18.04.4 LTS

Matrix products: default
BLAS: /usr/lib/x86_64-linux-gnu/blas/libblas.so.3.7.1
LAPACK: /usr/lib/x86_64-linux-gnu/lapack/liblapack.so.3.7.1

locale:
 [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C              
 [3] LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8    
 [5] LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8   
 [7] LC_PAPER=en_US.UTF-8       LC_NAME=C                 
 [9] LC_ADDRESS=C               LC_TELEPHONE=C            
[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C       

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] data.table_1.12.8

loaded via a namespace (and not attached):
[1] compiler_3.4.4 tools_3.4.4   

[MichaelChirico]

Thanks for the issue report. I believe this is subsumed by #4221 and/or #3509, so I'll close this. Please re-open if you think it's a different issue.

[valentas-kurauskas]

@MichaelChirico you are right, my bug is just a more minimal example of #3509.

[jangorecki]

@valentas-kurauskas that is good, I put it in related issue. Thanks!

[st-pasha]

I believe the first issue in this series is #1109

[jangorecki]

I even see @valentas-kurauskas comment there from March :-)