Prevent invariant assert failure on win+debug (#78636)
Summary:
Provide missing break statements to correct for IListRef
handling on Windows MSVC Debug builds.
Test Plan:
Run any torch IListRefIterator destruction on windows in a
debug mode build. Without this change, it will destruct incorrectly for
Boxed IListRefTag, and invariably hit an always-fail assert for IListRef
tag. With it, proper destruction, iterator payload assignment, and no
assert encounter with valid IListRefTag will occur.
Differential Revision: D36811554
Pull Request resolved: https://github.com/pytorch/pytorch/pull/78636
Approved by: https://github.com/malfet, https://github.com/atalman
