[Rd] Segfault when performing match on POSIXlt object
m@echler @ending from @t@t@m@th@ethz@ch
Fri Aug 31 16:00:07 CEST 2018
>>>>> Marco Giuliano
>>>>> on Fri, 31 Aug 2018 08:53:02 +0200 writes:
> Hi All, I found a possible unexpected behavior when
> performing match/%in% on POSIXlt objects, e.g. :
> d <- as.POSIXlt('2018-01-01')
> # match(<anything>,<POSIXlt>) --> segfault match(0,d)
> # consequently also this fails : 0 %in% d
> REPORTED ERROR ON LINUX: *** caught segfault *** address
> 0x16dc2, cause 'memory not mapped'
> Verified on 3.5.0 on linux, 3.5.1 on Windows.
Confirmed (Linux, I think all version >= 3.4.0, but not in R
3.3.3 (or earlier, presumably).
Note the segfault happens inspite of the match_transform() utility
which explicitly checks for "POSIXlt" and the code comment which
says that "POSIXlt" should have been transformed to character,
but seems to fail in recent versions of R.
> I think this could be a bug, since even if that match
> operation makes no sense, the R session is not supposed to
> crash with segmentation fault, but rather throw an
Definitely. It is a bug.
> Thanks in advance
Thank you for reporting!
Martin Maechler, ETH Zurich
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