6426 warn when inverting lazy + non-lazy-invertible transforms

[wyli]

Fixes #6426

Description

only warn when checking the most recent applied operations

Types of changes

• Non-breaking change (fix or new feature that would not break existing functionality).
• Breaking change (fix or new feature that would cause existing functionality to change).
• New tests added to cover the changes.
• Integration tests passed locally by running ./runtests.sh -f -u --net --coverage.
• Quick tests passed locally by running ./runtests.sh --quick --unittests --disttests.
• In-line docstrings updated.
• Documentation updated, tested make html command in the docs/ folder.

[ericspod]

Actually @atbenmurray would like to review.

[atbenmurray]

#6257 Fixes the issue that required this special case code. I don't think that in the general case it should be possible to end up with pending transforms if you have used compose. Is this change (and the underlying warning) actually still necessary?

[wyli]

yes, it's necessary to warn the user defined transforms

[wyli]

/build