Issues

• Issues with merge factor attributes when merge all = TRUE

  joins[rbind|cbind|merge]list
  Rdatatable/data.table#7906 · Filter by author ProfFancyPants opened on Sep 30, 2026

• rowwiseDT() could support setting key

  feature request
  Rdatatable/data.table#7905 · Filter by author MichaelChirico opened on Sep 29, 2026

• all.equal only reports differences in first column with differences

  Rdatatable/data.table#7903 · Filter by author BartJanvanRossum opened on Sep 22, 2026
  7

• fread(text = ..., yaml = TRUE) fails with "cannot open file" when input is a scalar character string with newlines

  bugfread
  Rdatatable/data.table#7896 · Filter by author Noskario opened on Sep 2, 2026

• frollapply could optionally use mirai+mori rather than base R parallel's fork

  feature requestfrollparallel
  Rdatatable/data.table#7891 · Filter by author jangorecki opened on Aug 25, 2026
  5

• all.equal could have option to sub-aggregate before comparison

  feature request
  Rdatatable/data.table#7890 · Filter by author jangorecki opened on Aug 25, 2026

• as.data.table() recurses without end on a survival::Surv object (or any data.frame carrying one)

  Rdatatable/data.table#7887 · Filter by author amaltawfik opened on Aug 23, 2026

• CJ(letters, letters) fails (duplicate column name)

  Rdatatable/data.table#7873 · Filter by author MichaelChirico opened on Jul 31, 2026
  2

• frollsd on ancient Windows can give NaN where NA is intended

  consistencyfrollplatform-specific
  Rdatatable/data.table#7854 · Filter by author MichaelChirico opened on Jul 28, 2026
  

• test() doesn't distinguish plain NA_real_, NaN

  consistencytests
  Rdatatable/data.table#7853 · Filter by author MichaelChirico opened on Jul 28, 2026
  3

• test() should error on uncaught output

  beginner-tasktests
  Rdatatable/data.table#7847 · Filter by author MichaelChirico opened on Jul 26, 2026

• Show x,y diff holistically in test() failure

  tests
  Rdatatable/data.table#7843 · Filter by author MichaelChirico opened on Jul 26, 2026

• .SD in grouped operations causes update() to refit on wrong data subset

  Rdatatable/data.table#7831 · Filter by author PMildenb opened on Jul 23, 2026
  3

• all.equal.data.table throws "Dataset 'current' has rows not present in 'target'" when double precision values are numerically, but not exactly, equal

  Rdatatable/data.table#7816 · Filter by author kjellpk opened on Jul 15, 2026
  3

• Another post-rows-deletion-by-reference FR/suggestion

  feature request
  Rdatatable/data.table#7812 · Filter by author iagogv3 opened on Jul 11, 2026
  1

• fread causing r to crash when assigning to variable in R 4.6.1

  Rdatatable/data.table#7811 · Filter by author itendswells opened on Jul 10, 2026
  9

• Issue with modifying an empty nested table

  Rdatatable/data.table#7806 · Filter by author rickhelmus opened on Jul 1, 2026

• S7 and a new := named-bind operator

  Rdatatable/data.table#7801 · Filter by author hadley opened on Jun 24, 2026
  2

• long column names go past width

  print
  Rdatatable/data.table#7797 · Filter by author tdhock opened on Jun 19, 2026
  1

• remove capture.output from tests

  beginner-tasktests
  Rdatatable/data.table#7792 · Filter by author tdhock opened on Jun 17, 2026
  1

  

• Slower fsetdiff vs dplyr::setdiff

  atime
  Rdatatable/data.table#7783 · Filter by author cgiachalis opened on Jun 7, 2026
  3

• Time units in progress messages

  beginner-task
  Rdatatable/data.table#7772 · Filter by author Kodiologist opened on Jun 1, 2026
  2

• 5 packages fail checks after prohibiting duplicate key columns

  revdep
  Rdatatable/data.table#7770 · Filter by author tdhock opened on May 30, 2026
  10

• Should nafill/setnafill allow coercsion and/or have more verbose warning messages?

  Rdatatable/data.table#7757 · Filter by author KyleHaynes opened on May 22, 2026
  2

• Outdated pieces of vignettes

  beginner-taskdocumentation
  Rdatatable/data.table#7755 · Filter by author MichaelChirico opened on May 21, 2026
  1