I got a similar result from R-Studio 1.0.44 with
> sessionInfo()
R version 3.3.2 (2016-10-31)
Platform: x86_64-apple-darwin13.4.0 (64-bit)
Running under: OS X El Capitan 10.11.6
locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8
attached base packages:
[1] stats graphics grDevices utils
[5] datasets methods base
loaded via a namespace (and not attached):
[1] tools_3.3.2
> d <- as.POSIXlt(Sys.time())
> d$zone <- NULL
> d$zone <- ""
: "R Session Aborted. R encountered a fatal error. The session was
terminated. Start New Session".
I got essentially the same result with R 3.3.1. Then I installed
3.3.2 and got the above.
Spencer Graves
On 12/6/2016 11:27 AM, frede...@ofb.net wrote:
Hi all,
Here's a more minimal version of my earlier bug report (thanks, Joshua
Ulrich):
d=as.POSIXlt(Sys.time()); d$zone=NULL; d$zone=""; d
I got some helpful, if glib, feedback from Joshua that the segfault
may be caused by the changing of the order of the list elements in 'd'
(representing the "internal structure" of the POSIXlt object).
He seems to think that it's OK for R to segfault - I was wondering if
someone else could lend a second opinion. My understanding is that we
should try to avoid segfaulting as a way of handling errors, if only
because they become much more difficult to debug when the R session is
forced to quit.
I don't know exactly which line is causing the bug, but looking at the
code for do_formatPOSIXlt in "src/main/datetime.c", it seems that
there would not be a huge performance penalty to add an extra sanity
check to prevent this from occurring.
Thank you,
Frederick
On Tue, Dec 06, 2016 at 04:37:20AM -0800, frede...@ofb.net wrote:
Hi all,
I ran into a segfault while playing with dates.
$ R --no-init-file
...
> library(lubridate); d=as.POSIXlt(floor_date(Sys.time(),"year")); d$zone=NULL;
d$zone=""; d
Attaching package: ‘lubridate’
The following object is masked from ‘package:base’:
date
Warning message:
package ‘lubridate’ was built under R version 3.4.0
*** caught segfault ***
address (nil), cause 'unknown'
Traceback:
1: format.POSIXlt(x, usetz = TRUE)
2: format(x, usetz = TRUE)
3: print(format(x, usetz = TRUE), ...)
4: print.POSIXlt(x)
5: function (x, ...) UseMethod("print")(x)
Possible actions:
...
Hope I'm not doing something illegal...
Thanks,
Frederick
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