CMP0121

.. versionadded:: 3.21

The :command:list command now detects invalid indices.

Prior to CMake version 3.21, the :command:list command's GET, INSERT, SUBLIST, and REMOVE_AT subcommands did not detect invalid index arguments.

The OLD behavior of this policy is for invalid indices to be treated as their integer value (if any) at the start of the string. For example, 2good4you is a 2 and not_an_integer is a 0. The NEW behavior is for invalid indices to trigger an error.

.. |INTRODUCED_IN_CMAKE_VERSION| replace:: 3.21 .. |WARNS_OR_DOES_NOT_WARN| replace:: warns .. include:: include/STANDARD_ADVICE.rst

.. include:: include/DEPRECATED.rst