https://uberchromegw.corp.google.com/i/chromium.perf/builders/Mac%20Pro%2010.11%20Perf/builds/831 is the relevant build.

https://uberchromegw.corp.google.com/i/chromium.perf/builders/Win%20Zenbook%20Perf/builds/478 and https://uberchromegw.corp.google.com/i/chromium.perf/builders/Win%207%20x64%20Perf/builds/591 also are affected by this.

It looks like the recipe quit after a collect step failed. This is pretty bad; it quit the build early, so a bunch of tasks were still running. I'm going to manually cancel them, but the recipe shouldn't have quit that quickly.