Historically, the objects in ApplyTask were being modified in the
Start func by BuildInfo to remove the path annotation, but this can
cause a race condition in the task runner if it tried to read the
task objects.
Now a DeepCopy is made in BuildInfo instead. This avoids the race
condition but broke mutation, which executes after BuildInfo on the
original object. So we now extract the object from the into after
BuildInfo and use that instead for mutations, filters, and events.
Karl Isenberg
Morten Torkildsen
Sean Sullivan
Mikhail Mazurskiy