This is an automated CL created by the recipe roller. This CL rolls recipe
changes from upstream projects (e.g. depot_tools) into downstream projects
(e.g. tools/build).


More info is at https://goo.gl/zkKdpD. Use https://goo.gl/noib3a to file a bug.
recipe_engine:
  https://crrev.com/0624ac77bb1b64cb175809e332b9a6ae4f9b77e3 Switch RecipeEngine._step_stack to be GLS. (iannucci@chromium.org)
  https://crrev.com/bfed55c460d57a5185a6a3a036de835f0a5940ad Make _step_stack never empty. (iannucci@chromium.org)


TBR=iannucci@chromium.org

Recipe-Tryjob-Bypass-Reason: Autoroller
Bugdroid-Send-Email: False
Change-Id: If8378d61bf5233f81284771a323008a66d4b8c65
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1641599Reviewed-by: Recipe Roller <recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Recipe Roller <recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com>