Found the following significant warnings:
  base_radixsort.c:111:62: warning: format ‘%p’ expects argument of type ‘void *’, but argument 4 has type ‘struct SEXPREC **’ [-Wformat=]
  base_radixsort.c:111:65: warning: format ‘%p’ expects argument of type ‘void *’, but argument 5 has type ‘R_len_t *’ {aka ‘int *’} [-Wformat=]
  base_radixsort.c:447:11: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long unsigned int’ [-Wformat=]
  base_radixsort.c:463:11: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long unsigned int’ [-Wformat=]
  base_radixsort.c:1133:15: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long unsigned int’ [-Wformat=]
  base_radixsort.c:1171:6: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long unsigned int’ [-Wformat=]
  base_radixsort.c:1262:15: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long unsigned int’ [-Wformat=]
  base_radixsort.c:1778:13: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long unsigned int’ [-Wformat=]
  base_radixsort.c:1783:13: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long unsigned int’ [-Wformat=]
  data.table_init.c:54:46: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long unsigned int’ [-Wformat=]
  data.table_init.c:67:55: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long unsigned int’ [-Wformat=]
  data.table_init.c:68:61: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long unsigned int’ [-Wformat=]
  data.table_init.c:70:67: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long unsigned int’ [-Wformat=]
  data.table_init.c:71:85: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long unsigned int’ [-Wformat=]
  data.table_init.c:72:70: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long unsigned int’ [-Wformat=]
  data.table_init.c:72:94: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long unsigned int’ [-Wformat=]
  data.table_init.c:73:65: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long unsigned int’ [-Wformat=]
  data.table_init.c:74:63: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long unsigned int’ [-Wformat=]
  data.table_init.c:75:71: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long unsigned int’ [-Wformat=]
  data.table_init.c:76:61: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long unsigned int’ [-Wformat=]
  data.table_init.c:77:63: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long unsigned int’ [-Wformat=]
  data.table_init.c:78:63: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long unsigned int’ [-Wformat=]
  data.table_init.c:79:65: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long unsigned int’ [-Wformat=]
  data.table_init.c:83:79: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘R_xlen_t’ {aka ‘long int’} [-Wformat=]
  data.table_rbindlist.c:140:62: warning: format ‘%p’ expects argument of type ‘void *’, but argument 4 has type ‘struct SEXPREC **’ [-Wformat=]
  data.table_rbindlist.c:140:65: warning: format ‘%p’ expects argument of type ‘void *’, but argument 5 has type ‘R_len_t *’ {aka ‘int *’} [-Wformat=]
  data.table_rbindlist.c:247:57: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long int’ [-Wformat=]
  data.table_rbindlist.c:256:58: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long int’ [-Wformat=]
See ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/collapse.Rcheck/00install.out’ for details.
* used C compiler: ‘gcc-13 (Debian 13.2.0-5) 13.2.0’
* used C++ compiler: ‘g++-13 (Debian 13.2.0-5) 13.2.0’