Distributed Services With Go - Agent_test.go error line 77

This test is broken right out of the box…
— FAIL: TestAgent (7.82s)
agent_test.go:77:
Error Trace: agent_test.go:77
agent_test.go:116
Error: Received unexpected error:
FlushFileBuffers: The handle is invalid.
Test: TestAgent
testing.go:906: race detected during execution of test
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