[7.x] [@kbn/optimizer] prevent error when all bundles are cached (#57871)#57891

Merged

spalger merged 1 commit intoelastic:7.xfrom spalger:backport/7.x/pr-57871

Feb 19, 2020

+36-2

Commits on Feb 18, 2020

[@kbn/optimizer] prevent error when all bundles are cached (elastic#57871 )

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