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Combining POSIXlt and POSIXct yield an infinite loop #1013

ThierryO opened this issue Jan 12, 2022 · 1 comment

Combining POSIXlt and POSIXct yield an infinite loop #1013

ThierryO opened this issue Jan 12, 2022 · 1 comment


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Combining POXIXlt and POSIXct work using only base R

old_ct <- as.POSIXct("1900-01-01 01:02:03")
old_lt <- as.POSIXlt("1900-01-01 01:02:03")
x <- c(old_ct, old_lt)

Loading lubridate results in an infinite loop

x <- c(old_ct, old_lt)
# Error: C stack usage  7973012 is too close to the limit

.recursive_posixct_unclass <- function(x, tz = "UTC") {

session info

─ Session info ─────────────────────────────────────────────────────────────────────────────────────────────────────────
 setting  value
 version  R version 4.1.2 (2021-11-01)
 os       Ubuntu 20.04.3 LTS
 system   x86_64, linux-gnu
 ui       RStudio
 language nl_BE:nl
 collate  nl_BE.UTF-8
 ctype    nl_BE.UTF-8
 tz       Europe/Brussels
 date     2022-01-12
 rstudio  2022.02.0-daily+366 Prairie Trillium (desktop)
 pandoc @ /usr/bin/pandoc

 ─ Packages ─────────────────────────────────────────────────────────────────────────────────────────────────────────────
 package     * version date (UTC) lib source
 cli           3.1.0   2021-10-27 [1] CRAN (R 4.1.2)
 fortunes      1.5-4   2016-12-29 [1] CRAN (R 4.1.0)
 generics      0.1.1   2021-10-25 [1] CRAN (R 4.1.1)
 lubridate   * 1.8.0   2022-01-12 [1] Github (tidyverse/lubridate@46d8d19)
 sessioninfo   1.2.2   2021-12-06 [1] CRAN (R 4.1.2)

 [1] /home/thierry/R/x86_64-pc-linux-gnu-library/4.0
 [2] /usr/local/lib/R/site-library
 [3] /usr/lib/R/site-library
 [4] /usr/lib/R/library
@vspinu vspinu closed this as completed in 7f5323b Jan 12, 2022
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vspinu commented Jan 12, 2022

Thanks for reporting this!

netbsd-srcmastr pushed a commit to NetBSD/pkgsrc that referenced this issue Jun 5, 2023
Version 1.9.2


* [#1104](tidyverse/lubridate#1104) Fix
  incorrect parsing of months when %a format is present.


* Adapt to internal name changes in R-devel

Version 1.9.1


* `as_datetime()` accepts multiple formats in format argument, just like `as_date()` does.


* [#1091](tidyverse/lubridate#1091) Fix
  formatting of numeric inputs to parse_date_time.

* [#1092](tidyverse/lubridate#1092) Fix
  regression in `ymd_hm` on locales where `p` format is not defined.

* [#1097](tidyverse/lubridate#1097) Fix
  `as_date("character")` to work correctly with formats that include
  extra characters.

* [#1098](tidyverse/lubridate#1098) Roll
  over the month boundary in `make_dateime()` when units exceed their
  maximal values.

* [#1090](tidyverse/lubridate#1090)
  timechange has been moved from Depends to Imports.

Version 1.9.0


* `roll` argument to updating and time-zone manipulation functions is
  deprecated in favor of a new `roll_dst` parameter.

* [#1042](tidyverse/lubridate#1042)
  `as_date` with character inputs accepts multiple formats in `format`
  argument. When `format` is supplied, the input string is parsed with
  `parse_date_time` instead of the old `strptime`.

* [#1055](tidyverse/lubridate#1055)
  Implement `as.integer` method for Duration, Period and Interval

* [#1061](tidyverse/lubridate#1061) Make
  `year<-`, `month<-` etc. accessors truly generic. In order to make
  them work with arbitrary class XYZ, it's enough to define a
  `reclass_date.XYZ` method.

* [#1061](tidyverse/lubridate#1061) Add
  support for `year<-`, `month<-` etc. accessors for `data.table`'s
  IDate and ITime objects.

* [#1017](tidyverse/lubridate#1017)
  `week_start` argument in all lubridate functions now accepts full
  and abbreviated names of the days of the week.

* The assignment value `wday<-` can be a string either in English or
  as provided by the current locale.

* Date rounding functions accept a date-time `unit` argument for
  rounding to a vector of date-times.

* [#1005](tidyverse/lubridate#1005)
  `as.duration` now allows for full roundtrip `duration ->
  as.character -> as.duration`

* [#911](tidyverse/lubridate#911) C parsers
  treat multiple spaces as one (just like strptime does)

* `stamp` gained new argument `exact=FALSE` to indicate whether
  `orders` argument is an exact strptime formats string or not.

* [#1001](tidyverse/lubridate#1001) Add
  `%within` method with signature (Interval, list), which was
  documented but not implemented.

* [#941](tidyverse/lubridate#941)
  `format_ISO8601()` gained a new option `usetz="Z"` to format time
  zones with a "Z" and convert the time to the UTC time zone.

* [#931](tidyverse/lubridate#931) Usage of
  `Period` objects in rounding functions is explicitly documented.


* [#1036](tidyverse/lubridate#1036)
  `%within%` now correctly works with flipped intervals

* [#1085](tidyverse/lubridate#1085)
  `as_datetime()` now preserves the time zone of the POSIXt input.

* [#1072](tidyverse/lubridate#1072) Names
  are now handled correctly when combining multiple Period or Interval

* [#1003](tidyverse/lubridate#1003)
  Correctly handle r and R formats in locales which have no p format

* [#1074](tidyverse/lubridate#1074) Fix
  concatination of named Period, Interval and Duration vectors.

* [#1044](tidyverse/lubridate#1044) POSIXlt
  results returned by `fast_strptime()` and `parse_date_time2()` now
  have a recycled `isdst` field.

* [#1069](tidyverse/lubridate#1069) Internal
  code handling the addition of period months and years no longer
  generates partially recycled POSIXlt objects.

* Fix rounding of POSIXlt objects

* [#1007](tidyverse/lubridate#1007) Internal
  lubridate formats are no longer propagated to stamp formater.

* `train` argument in `parse_date_time` now takes effect. It was
  previously ignored.

* [#1004](tidyverse/lubridate#1004) Fix
  `c.POSIXct` and `c.Date` on empty single POSIXct and Date vectors.

* [#1013](tidyverse/lubridate#1013) Fix
  c(`POSIXct`,`POSIXlt`) heterogeneous concatenation.

* [#1002](tidyverse/lubridate#1002) Parsing
  only with format `j` now works on numeric inputs.

* `stamp()` now correctly errors when no formats could be guessed.

* Updating a date with timezone (e.g. `tzs = "UTC"`) now returns a POSIXct.


* `lubridate` is now relying on `timechange` package for update and
  time-zone computation. Google's CCTZ code is no longer part of the

* `lubridate`'s updating logic is now built on top of `timechange`

* Change implementation of `c.Period`, `c.Duration` and `c.Interval`
  from S4 to S3.

Version 1.8.0


* [#960](tidyverse/lubridate#960)
  `c.POSIXct` and `c.Date` can deal with heterogeneous object types
  (e.g `c(date, datetime)` works as expected)


* [#994](tidyverse/lubridate#994)
  Subtracting two duration or two period objects no longer results in
  an ambiguous dispatch note.

* `c.Date` and `c.POSIXct` correctly deal with empty vectors.

* `as_datetime(date, tz=XYZ)` returns the date-time object with HMS
  set to 00:00:00 in the corresponding `tz`


* [#966](tidyverse/lubridate#966) Lubridate is
  now built with cpp11 (contribution of @DavisVaughan)
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