The autoroller is trying to roll based off of an old framework master commit which is before the new flutter release version tag. Thus, the tool cannot get a prior valid release tag, and parses the version as 0.0.0-unknown, causing flutter_tools unit tests to fail. This manual roll based off of latest master should pass. Whether or not it unblocks the autoroller is depends on if the autoroller picks a newer framework commit to base its next roll off of.

git log 4bcfae8..0c35a34 --first-parent --oneline
2020-04-28 [email protected] Roll src/third_party/skia f5132a05c893..4baa7326ccfb (1 commits) (flutter/engine#18003)
2020-04-28 [email protected] Roll src/third_party/skia 5f56cb1d3b4f..f5132a05c893 (6 commits) (flutter/engine#17999)
2020-04-28 [email protected] Bumped up the timeout for testAccessibilityFocusOnTextSemanticsProducesCorrectIosViews (flutter/engine#17988)
2020-04-28 [email protected] Roll src/third_party/skia 81ef385c1fcd..5f56cb1d3b4f (14 commits) (flutter/engine#17991)
2020-04-28 [email protected] Roll Dart to 726d3c772554924f62db0b9e0d4c280dbbddc824 (flutter/engine#17993)
2020-04-28 [email protected] Trial PR to enable null safety unfork in the Dart SDK. (flutter/engine#17818)
2020-04-28 [email protected] Roll fuchsia/sdk/core/linux-amd64 from eapIV... to 3h-X9... (flutter/engine#17987)
2020-04-28 [email protected] Set SkSL asset manager in RunConfiguration ctor (flutter/engine#17948)
2020-04-28 [email protected] Started ignoring remote keyboard notifications. (flutter/engine#17981)
2020-04-27 [email protected] Reenable flutter scenic test to identify crashes and follow up on fixes. (flutter/engine#17979)
2020-04-27 [email protected] Update buildroot (flutter/engine#17978)
2020-04-27 [email protected] Roll src/third_party/skia 78debd6f6d83..81ef385c1fcd (1 commits) (flutter/engine#17976)
2020-04-27 [email protected] [web] Don't allow empty initial route (flutter/engine#17936)
2020-04-27 [email protected] Roll fuchsia/sdk/core/mac-amd64 from 9O3Ef... to arZdZ... (flutter/engine#17975)
2020-04-27 [email protected] Roll src/third_party/skia 981d590e8eba..78debd6f6d83 (5 commits) (flutter/engine#17972)
2020-04-27 [email protected] Manual roll of Dart to 03429b20cd67f85d65cc589b529ab8c1a4780912...a53d336b9fd4bbb415d2f1e3f4c653aa107f31c7 (flutter/engine#17971)
2020-04-27 [email protected] Roll src/third_party/skia 1ae3e75a0b4c..981d590e8eba (1 commits) (flutter/engine#17968)
2020-04-27 [email protected] Add initial unit tests for the android embedding (flutter/engine#17921)
2020-04-27 [email protected] Roll src/third_party/dart 2e438d1baffc..a53d336b9fd4 (4 commits) (flutter/engine#17967)
2020-04-26 [email protected] Roll src/third_party/skia 97cfb05aabe4..1ae3e75a0b4c (2 commits) (flutter/engine#17966)
2020-04-26 [email protected] Roll fuchsia/sdk/core/mac-amd64 from 2CE6x... to 9O3Ef... (flutter/engine#17963)
2020-04-26 [email protected] Roll src/third_party/skia c12aad9485a9..97cfb05aabe4 (3 commits) (flutter/engine#17957)
2020-04-26 [email protected] Roll fuchsia/sdk/core/mac-amd64 from 9-v-E... to 2CE6x... (flutter/engine#17955)
2020-04-25 [email protected] Roll src/third_party/dart 216e3df4526c..2e438d1baffc (7 commits) (flutter/engine#17950)
2020-04-25 [email protected] Change the repo fetch script used in integration tests (flutter/engine#17943)
2020-04-24 [email protected] Roll src/third_party/skia 1e21d14f2b8b..c12aad9485a9 (20 commits) (flutter/engine#17942)
2020-04-24 [email protected] Roll src/third_party/dart a69cb6d700f5..216e3df4526c (16 commits) (flutter/engine#17945)
2020-04-24 [email protected] Fix accessibility focus loss when first focusing on text field (flutter/engine#17803)
2020-04-24 [email protected] Roll fuchsia/sdk/core/linux-amd64 from _dAFU... to G4HpJ... (flutter/engine#17938)
2020-04-24 [email protected] [web] Fix exception when getting boxes for rich text range (flutter/engine#17933)
2020-04-24 [email protected] [web] Batch systemFontChange messages (flutter/engine#17885)