Are the arrow'd lines below due to race conditions? Running

./pants fix ::

on 2.15.0a0

20:57:36.78 [INFO] Completed: Format with shfmt - shfmt made no changes.
--> 20:57:38.46 [INFO] Canceled: Building autoflake.pex from autoflake_default.lock
20:57:39.75 [INFO] Completed: Building clang_format.pex from clang-format_default.lock
20:57:40.09 [INFO] Completed: Building autoflake.pex from autoflake_default.lock
20:57:40.44 [INFO] Completed: Fix with Autoflake - autoflake made no changes.
--> 20:57:40.46 [INFO] Canceled: Building pyupgrade.pex from pyupgrade_default.lock
20:57:40.52 [INFO] Completed: Fix with Autoflake - autoflake made no changes.
20:57:40.55 [INFO] Completed: Fix with Autoflake - autoflake made no changes.
--> 20:57:40.57 [INFO] Canceled: Building pyupgrade.pex from pyupgrade_default.lock
20:57:40.70 [INFO] Completed: pants.backend.cc.lint.clangformat.rules.clangformat_fmt - clang-format made no changes.
20:57:41.87 [INFO] Completed: Building pyupgrade.pex from pyupgrade_default.lock
20:57:42.22 [INFO] Completed: Fix with pyupgrade - pyupgrade made no changes.
20:57:42.27 [INFO] Completed: Fix with pyupgrade - pyupgrade made no changes.
20:57:42.28 [INFO] Completed: Fix with pyupgrade - pyupgrade made no changes.
20:57:45.13 [INFO] Completed: Building black.pex from black_default.lock
20:57:47.60 [INFO] Completed: Format with Black - black made no changes.
20:57:47.69 [INFO] Completed: Format with Black - black made no changes.
20:57:47.71 [INFO] Completed: Format with Black - black made no changes.
--> 20:57:47.73 [INFO] Canceled: Building isort.pex from isort_default.lock
20:57:49.05 [INFO] Completed: Building isort.pex from isort_default.lock
20:57:49.50 [INFO] Completed: Format with isort - isort made no changes.
20:57:49.56 [INFO] Completed: Format with isort - isort made no changes.
20:57:49.57 [INFO] Completed: Format with isort - isort made no changes.

Have you read https://blog.pantsbuild.org/fast-incremental-builds-speculation-cancellation/?

ooh, no haven't read that - just strange that I'd never seen those cancellations before in this repo