gotwarlost/istanbul — pull request #246 by gregpabian (2014-08-26 09:15:04+00:00)
Title: Feature: check tracker variable option.

This feature adds a `checkTrackerVar` option to the Instrumenter. When enabled, it that will wrap every function/statement/branch counter statement with a check for tracker variable existence. This is useful when a part of the instrumented code is executed in a different context (e.g. in a vm or an iframe).
By default this option is set to `false`.