@kinetiknz I uploaded the patch to the try server and got build breaks for 64-bit Android targets while all GitHub checks passed. Are build-android 32-bit targets only?
Fixed in more recent patches, if you can take another look @jhlin ? Commit 2d8568a made it reproduce the failure you saw on Treeherder, and then the two subsequent commits fixed it.
Diagnosed by jolin@mozilla.com, the same code is also found in Chromium.
@jhlin r? (I'm not sure how to flag you as reviewer on GitHub).