[Rd] [External] Potential bug with data.frame replacement

[Tierney, Luke]

Thanks for the report. The buffer overflow should be fixed in
R-patched and R-devel.

Best,

luke

On Sun, 14 Jul 2019, Benjamin Jean-Marie Tremblay wrote:

> Dear R-devel,
>
> I have encountered a crash-inducing scenario and would like to enquire as to
> whether this would be considered a bug. To reproduce the crash:
>
> X <- sample(letters, 3000, TRUE)
> D <- data.frame(X, 1:3000, X, X, X, X, X)
> D$X1.3000 <- paste0("GSM", D)
>
> The reason why I'm not sure if this would be considered a bug is because I
> typed this by accident, when what I meant was:
>
> D$X1.3000 <- paste0("GSM", D$X1.3000)
>
> I can never image a scenario where I would intentionally perform the former.
>
> This issue seems to have something to do with the size of the data.frame, as
> smaller examples will work fine:
>
> D <- data.frame(A = 1:10, B = letters[1:10])
> D$A <- paste0("A", D)
>
> Also just doing the paste0 part without trying to replace a data.frame column
> not crash R for me.
>
> I can submit this on Bugzilla should this be deemed sufficiently buggy.
>
> I am running 3.6.0 on macOS (x86_64-apple-darwin15.6.0).
>
> Sincerely,
>
> B.T.
>
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>

-- 
Luke Tierney
Ralph E. Wareham Professor of Mathematical Sciences
University of Iowa                  Phone:             319-335-3386
Department of Statistics and        Fax:               319-335-3017
    Actuarial Science
241 Schaeffer Hall                  email:   luke-tierney using uiowa.edu
Iowa City, IA 52242                 WWW:  http://www.stat.uiowa.edu