1CMP0121
2-------
3
4.. versionadded:: 3.21
5
6The :command:`list` command now detects invalid indices.
7
8Prior to CMake version 3.21, the :command:`list` command's ``GET``,
9``INSERT``, ``SUBLIST``, and ``REMOVE_AT`` subcommands did not detect invalid
10index arguments.
11
12The ``OLD`` behavior of this policy is for invalid indices to be treated as
13their integer value (if any) at the start of the string. For example,
14``2good4you`` is a ``2`` and ``not_an_integer`` is a ``0``. The ``NEW``
15behavior is for invalid indices to trigger an error.
16
17This policy was introduced in CMake version 3.21.  CMake version |release|
18warns when the policy is not set and uses ``OLD`` behavior. Use the
19:command:`cmake_policy` command to set it to ``OLD`` or ``NEW`` explicitly.
20
21.. include:: DEPRECATED.txt
22