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Decide: active compound state with an empty region #721

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Decide: active compound state with an empty region#721
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questionumlUML state machine semantics, tracked in #692

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@fgmacedo
fgmacedo
opened on Oct 15, 2026

Two PSSM cases (conflict:K13) expect a compound state to stay active with no active child. That drops the invariant that an active compound state has exactly one active child, so it would only exist behind a flag. Default proposal: keep both cases as accepted xfail.

Refs #692

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