Build showing errors

[alwinaugustin]

When I try to launch the web version using webdev serve, I am getting the following out put.

Creating build script, took 10047ms
[INFO] Setting up file watchers completed, took 25ms
[INFO] Waiting for all file watchers to be ready completed, took 202ms
[INFO] Reading cached asset graph completed, took 490ms
[INFO] Checking for updates since last build completed, took 744ms
[INFO] Running build completed, took 443ms
[INFO] Caching finalized dependency graph completed, took 282ms
[SEVERE] build_web_compilers:ddc on package:package_resolver/package_resolver.dartdevc.module (cached):
Error compiling dartdevc module:package_resolver|lib/package_resolver.ddc.js

[error] The imported library ''current_isolate_resolver_stub.dart'' can't have a part-of directive. (package:package_resolver/src/package_resolver.dart, line 12, col 8)
[error] The imported library ''utils_isolate_stub.dart'' can't have a part-of directive. (package:package_resolver/src/utils.dart, line 15, col 8)

Please fix all errors before compiling (warnings are okay).
}

[SEVERE] Failed after 742ms
Serving `web` on http://localhost:8080
Serving `test` on http://localhost:8081

It is showing that there is some error with package_resolver.