Bringing back the execution trace (#2092)
Bringing back the execution trace (#2092)


playi/pxt,Microsoft/pxt,switchinnovations/pxt,switch-education/pxt,switchinnovations/pxt,switch-education/pxt,switch-education/pxt,switchinnovations/pxt,playi/pxt,switchinnovations/pxt,switch-education/pxt,Microsoft/pxt,Microsoft/pxt,Microsoft/pxt,playi/pxt,playi/pxt,switch-education/pxt,Microsoft/pxt