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When building a data flow summary, break control and data flow after invocations with static result type 'Never', expressing that code after such invocation is unreachable. TEST=pkg/vm/testcases/transformations/type_flow/summary_collector/control_flow.dart Issue: https://github.com/dart-lang/sdk/issues/59941 Change-Id: I2e5acd861e4192bae231d356aeacf921a14766f5 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/405443 Reviewed-by: Slava Egorov <vegorov@google.com> Commit-Queue: Alexander Markov <alexmarkov@google.com>