https://app.circleci.com/pipelines/github/valhalla/valhalla/9433/workflows/ace39ece-eb56-4685-8129-5aae5dd63d49/jobs/54079

The elevation builder test is easily the longest test of all the tests. On CI it takes over 10 minutes during the coverage build and since it doesnt output anything during that time CI bails on it. A quick fix would be to have cmake somehow output a character every so often to work around it but long term it doesnt make sense to test with such a large extract (building all of utrecht again but with elevation this time..). What we should do is:

1. Convert this test to a gurka test as soon as possible
2. Fix the bug in get_coord which it assumes it will return an empty set when a tile doesnt exist but actually since it uses the tilebuilder interface (which will not alert you when you try to open an existing tile that doesnt actually exist) it segfaults trying to access graph nodes which arent there (not sure how CI isnt barfing on this already)