Fix TriggerRuleDep when the mapped tasks count is 0#30084
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* Fix TriggerRuleDep when the mapped tasks count is 0 * merge the two checks in a simple one (cherry picked from commit 8d22828)
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* Fix TriggerRuleDep when the mapped tasks count is 0 * merge the two checks in a simple one (cherry picked from commit 8d22828)
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closes: #30073
To calculate
ancestor_map_index, we dividemap_index * ancestor_ti_countbyti_countwhich can be zero when we expand a task group and we provide an empty list as argument, in this case the scheduler enter in a crush loop.In this PR I add a check for 0 value and a test to check if the
TriggerRuleDepworks with empty expended lists.