[Rd] Segfault when performing match on POSIXlt object

[Marco Giuliano]

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.

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 exception.

Thanks in advance

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