Nils, Did you ever try running the "try" build pointed to by the 2nd "treeherder" link in comment 173 above? If so, did it make a difference? Anyhow, it now appears that the "try" wsbuild outputs have been deleted from the try server due to time limits on storage. I haven't looked at this in over a month and it's really not something I completely understand or have worked with in the past. Maybe the developer who did the conversion from panacea to foldercache should look at this?
Bug 1726319 Comment 178 Edit History
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Nils, Did you ever try running the "try" build pointed to by the 2nd "treeherder" link in comment 173 above? If so, did it make a difference? Anyhow, it now appears that the "try" build outputs have been deleted from the try server due to time limits on storage. I haven't looked at this in over a month and it's really not something I completely understand or have worked with in the past. Maybe the developer who did the conversion from panacea to foldercache should look at this?