Hi,
I found in grid package, if the graphic parameters have zero length, R crashes.
In the
following code, I only tested `grid.rect()` and the `fill` parameter, but I
think it should
be similar as other grid graphic functions.
In `gpar()` function, the graphic parameters are not allowed to have zero
length, but
we can make them with zero length by first generating a `gpar` object and then
subsetting
with zero length index, such as follows:
```
> library(grid)
> gp = gpar(fill = 1)
> grid.rect(gp = gp[integer(0)])
```
After Executing the code, R crashes with message "Floating point exception: 8?".
If I set the value of `fill` to an integer, the following code causes an error
with a
not informative error message.
> library(grid)
> gp = gpar(fill = as.integer(1))
> grid.rect(gp = gp[integer(0)])
Error in grid.Call.graphics(C_rect, x$x, x$y, x$width, x$height,
resolveHJust(x$just, :
numerical color values must be >= 0, found -192882464
But sometimes it also causes R to crash.
My session info:
```
> sessionInfo()
R version 4.0.0 (2020-04-24)
Platform: x86_64-apple-darwin17.0 (64-bit)
Running under: macOS Catalina 10.15.4
Matrix products: default
BLAS:
/Library/Frameworks/R.framework/Versions/4.0/Resources/lib/libRblas.dylib
LAPACK:
/Library/Frameworks/R.framework/Versions/4.0/Resources/lib/libRlapack.dylib
locale:
[1] en_GB.UTF-8/en_GB.UTF-8/en_GB.UTF-8/C/en_GB.UTF-8/en_GB.UTF-8
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] colorout_1.2-2
loaded via a namespace (and not attached):
[1] compiler_4.0.0?
```
Best regards,
Zuguang Gu?
[[alternative HTML version deleted]]
______________________________________________
R-devel@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel
