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Bug 1621337 - Check if existingTargets is still defined when processing listWorkerChanged r=ochameau

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Differential Revision: https://phabricator.services.mozilla.com/D74699
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Julian Descottes 2020-05-22 06:46:31 +00:00
parent 8a87d1b582
commit 0eaaeb886a
1 changed files with 4 additions and 0 deletions
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4
devtools/shared/resources/legacy-target-watchers/legacy-workers-watcher.js
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@ -82,6 +82,10 @@ class LegacyWorkersWatcher {
// Fetch the list of already existing worker targets for this process target front.
const existingTargets = this.targetsByProcess.get(targetFront);
if (!existingTargets) {
// unlisten was called while processing the workerListChanged callback.
return;
}
// Process the new list to detect the ones being destroyed
// Force destroying the targets