Package igraph version 2.0.3
Package built using 86189/R 4.4.0; x86_64-pc-linux-gnu; 2024-03-25 23:59:36 UTC; unix   
Checked with rchk version fdc068715daa3a256062cc20e0d4a5157dacc9a4 LLVM version 14.0.6
More information at https://github.com/kalibera/cran-checks/blob/master/rchk/PROTECT.md
For rchk in docker image see https://github.com/kalibera/rchk/blob/master/doc/DOCKER.md

Function R_SEXP_to_attr_comb
  [PB] has possible protection stack imbalance igraph/src/rinterface_extra.c:288

Function R_igraph_attribute_add_edges_dup
  [UP] allocating function R_igraph_attribute_add_to_preserve_list may destroy its unprotected argument (newattr <arg 1>), which is later used. igraph/src/rinterface_extra.c:758
  [UP] calling allocating function R_igraph_attribute_add_to_preserve_list with a fresh pointer (newattr <arg 1>) igraph/src/rinterface_extra.c:758

Function R_igraph_attribute_add_vertices_dup
  [UP] allocating function R_igraph_attribute_add_to_preserve_list may destroy its unprotected argument (newattr <arg 1>), which is later used. igraph/src/rinterface_extra.c:529
  [UP] calling allocating function R_igraph_attribute_add_to_preserve_list with a fresh pointer (newattr <arg 1>) igraph/src/rinterface_extra.c:529

Function R_igraph_attribute_init
  [UP] allocating function R_igraph_attribute_add_to_preserve_list(V) may destroy its unprotected argument (result <arg 1>), which is later used. igraph/src/rinterface_extra.c:325
  [UP] calling allocating function R_igraph_attribute_add_to_preserve_list(V) with a fresh pointer (result <arg 1>) igraph/src/rinterface_extra.c:325
  [UP] unprotected variable result while calling allocating function Rf_allocVector igraph/src/rinterface_extra.c:328
  [UP] unprotected variable result while calling allocating function Rf_allocVector igraph/src/rinterface_extra.c:336
  [UP] unprotected variable result while calling allocating function Rf_allocVector igraph/src/rinterface_extra.c:337
  [UP] unprotected variable result while calling allocating function Rf_setAttrib(V,S:names,V) igraph/src/rinterface_extra.c:337
  [UP] unprotected variable result while calling allocating function Rf_allocVector igraph/src/rinterface_extra.c:345

Function R_igraph_attribute_permute_edges_same
  [UP] allocating function R_igraph_attribute_add_to_preserve_list may destroy its unprotected argument (newattr <arg 1>), which is later used. igraph/src/rinterface_extra.c:981
  [UP] calling allocating function R_igraph_attribute_add_to_preserve_list with a fresh pointer (newattr <arg 1>) igraph/src/rinterface_extra.c:981

Function R_igraph_attribute_permute_vertices_same
  [UP] allocating function R_igraph_attribute_add_to_preserve_list may destroy its unprotected argument (newattr <arg 1>), which is later used. igraph/src/rinterface_extra.c:671
  [UP] calling allocating function R_igraph_attribute_add_to_preserve_list with a fresh pointer (newattr <arg 1>) igraph/src/rinterface_extra.c:671