New in version 3.21.
list() command now detects invalid indices.
Prior to CMake version 3.21, the
REMOVE_AT subcommands did not detect invalid
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
not_an_integer is a
behavior is for invalid indices to trigger an error.
This policy was introduced in CMake version 3.21. CMake version 3.23.20220523-g722a9a6
warns when the policy is not set and uses
OLD behavior. Use the
cmake_policy() command to set it to
OLD behavior of a policy is
deprecated by definition
and may be removed in a future version of CMake.