Backport of Guard against double marking in other locations in evaluate into v0.14 #27286
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Backport
This PR is auto-generated from #27281 to be assessed for backporting due to the inclusion of the label 0.14-backport.
The below text is copied from the body of the original PR.
Add checks for double marking elsewhere in the evaluate code -- this is tough to test for, so submitting this as a cautionary patch, carrying the fix for #27131 over to output values without waiting for a bug report of "how" this can happen.