Free ForAll and Self Modifying Check: Set - #3042
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Greg Lindhorst (gregli-msft) wants to merge 6 commits into
Open
Free ForAll and Self Modifying Check: Set#3042Greg Lindhorst (gregli-msft) wants to merge 6 commits into
Greg Lindhorst (gregli-msft) wants to merge 6 commits into
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Greg Lindhorst (gregli-msft)
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Greg Lindhorst (gregli-msft)
marked this pull request as ready for review
March 20, 2026 05:26
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The
Setfunction was added to the interpreter with a small oversight:AllowedWithinNondeterministicOperationOrdershould have been set to false, as it is forClearandClearCollect, and asSetin Canvas apps. Because of this, it is possible to writeForAll( foo, Set( foo, [1,2,3] ) )and create self-modifying iterations.To fix this introduces a breaking change to Power Fx V1. A new feature
EnhancedIterationCheckshas been added with theBaseversion of the PR sequence to control this behavior. Existing Power Fx V1 hosts will see no change. New hosts should include this new feature which is bundled with Power Fx V2.