When a console message refers to something that happened in a worker thread, any links to source locations for that message do not work. The debugger opens but shows a message like 'Error loading this URI: No such actor for ID: server1.conn0.child1/workerTarget38/source4'

On closer inspection, this only happens when the clicking on a link for a message from a worker that has terminated.

we should have a mechanism to handle location that are no longer relevant.
We kind of have the same case when the "Persist Logs" is checked and you navigate to another page: the location of the messages from the previous page are still clickable, which might cause weird results.

Depends on D29592

Backed out for causing perma failures.

Failure with fail: https://treeherder.mozilla.org/#/jobs?repo=mozilla-inbound&resultStatus=testfailed%2Cbusted%2Cexception&classifiedState=unclassified&revision=60085ea6ff728115e1f61568702fd2348c15814d&selectedJob=246247394

Failure log: https://treeherder.mozilla.org/logviewer.html#/jobs?job_id=246247394&repo=mozilla-inbound&lineNumber=293

[task 2019-05-14T00:13:52.941Z] TEST START | Flow
[task 2019-05-14T00:14:07.236Z] Error ----------------------------------------------------------------------------------- src/reducers/sources.js:903:43
[task 2019-05-14T00:14:07.236Z]
[task 2019-05-14T00:14:07.236Z] Cannot call getSourceActorsForSource with state bound to state because property sourceActors is missing in
[task 2019-05-14T00:14:07.236Z] OuterState [1] but exists in SourceActorOuterState [2].
[task 2019-05-14T00:14:07.236Z]
[task 2019-05-14T00:14:07.236Z] src/reducers/sources.js:903:43
[task 2019-05-14T00:14:07.236Z] 903| const actors = getSourceActorsForSource(state, sourceId);
[task 2019-05-14T00:14:07.236Z] ^^^^^
[task 2019-05-14T00:14:07.236Z]
[task 2019-05-14T00:14:07.236Z] References:
[task 2019-05-14T00:14:07.236Z] src/reducers/sources.js:891:38
[task 2019-05-14T00:14:07.236Z] 891| export function canLoadSource(state: OuterState, sourceId: string) {
[task 2019-05-14T00:14:07.236Z] ^^^^^^^^^^ [1]
[task 2019-05-14T00:14:07.236Z] src/reducers/sources.js:880:23
[task 2019-05-14T00:14:07.236Z] 880| state: OuterState & SourceActorOuterState,
[task 2019-05-14T00:14:07.236Z] ^^^^^^^^^^^^^^^^^^^^^ [2]
[task 2019-05-14T00:14:07.236Z]
[task 2019-05-14T00:14:07.236Z]
[task 2019-05-14T00:14:07.236Z]
[task 2019-05-14T00:14:07.236Z] Found 1 error
[task 2019-05-14T00:14:07.236Z]
[task 2019-05-14T00:14:21.628Z] TEST-UNEXPECTED-FAIL | Cannot call getSourceActorsForSource with state bound to state because property sourceActors is missing in OuterState [1] but exists in SourceActorOuterState [2].

Backout: https://hg.mozilla.org/integration/mozilla-inbound/rev/22a3a17e5a419109cb17d83d1803ae652145b6a7

https://hg.mozilla.org/mozilla-central/rev/846d0d928675