race condition with the run CLI command #49703
Description
Both pub's precompile pipeline and the --resident pipeline for dart run keep kernel files around for faster compile times. These kernel files are given to the CFE along with the source code to perform a compilation and are then given to the VM to run. While the VM is reading this kernel into memory, another compilation of the same Dart source file from a different process could overwrite this kernel file.
I have not been able to reproduce this, but there is a TODO in the frontend_server code.