1037 

  1038 Check that recursive reference does not fall into RuntimeError (issue4758):

  1039 

  1040  common mistake:

  1041 

  1042   $ hg log -T '{changeset}\n'

  1043   abort: recursive reference 'changeset' in template

  1044   [255]

  1045 

  1046  circular reference:

  1047 

  1048   $ cat << EOF > issue4758

  1049   > changeset = '{foo}'

  1050   > foo = '{changeset}'

  1051   > EOF

  1052   $ hg log --style ./issue4758

  1053   abort: recursive reference 'foo' in template

  1054   [255]

  1055 

  1056  not a recursion if a keyword of the same name exists:

  1057 

  1058   $ cat << EOF > issue4758

  1059   > changeset = '{tags % rev}'

  1060   > rev = '{rev} {tag}\n'

  1061   > EOF

  1062   $ hg log --style ./issue4758 -r tip

  1063   8 tip