datastore: TestIntegration_IgnoreFieldMismatch failed

[flaky-bot[bot]]

This test failed!

To configure my behavior, see the Flaky Bot documentation.

If I'm commenting on this issue too often, add the flakybot: quiet label and I will stop commenting.

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commit: 9afb797d75499807b29c372ec375668be4d2995e buildURL: Build Status, Sponge status: failed

[flaky-bot[bot]]

Looks like this issue is flaky. :worried:

I'm going to leave this open and stop commenting.

A human should fix and close this.

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When run at the same commit (9afb797d75499807b29c372ec375668be4d2995e), this test passed in one build (Build Status, Sponge) and failed in another build (Build Status, Sponge).

[bhshkh]

Error from logs:

=== RUN   TestIntegration_IgnoreFieldMismatch
=== RUN   TestIntegration_IgnoreFieldMismatch/Without_IgnoreFieldMismatch_option
=== RUN   TestIntegration_IgnoreFieldMismatch/With_IgnoreFieldMismatch_option
--- FAIL: TestIntegration_IgnoreFieldMismatch (1.90s)
    --- PASS: TestIntegration_IgnoreFieldMismatch/Without_IgnoreFieldMismatch_option (1.32s)
    --- FAIL: TestIntegration_IgnoreFieldMismatch/With_IgnoreFieldMismatch_option (0.38s)
panic: runtime error: index out of range [0] with length 0 [recovered]
	panic: runtime error: index out of range [0] with length 0

goroutine 187 [running]:
testing.tRunner.func1.2({0x1255c60, 0xc000040600})
	/[usr/local/go/src/testing/testing.go:1632](https://cs.corp.google.com/piper///depot/google3/usr/local/go/src/testing/testing.go?l=1632) +0x3fc
testing.tRunner.func1()
	/[usr/local/go/src/testing/testing.go:1635](https://cs.corp.google.com/piper///depot/google3/usr/local/go/src/testing/testing.go?l=1635) +0x6b6
panic({0x1255c60?, 0xc000040600?})
	/[usr/local/go/src/runtime/panic.go:785](https://cs.corp.google.com/piper///depot/google3/usr/local/go/src/runtime/panic.go?l=785) +0x132
[cloud.google.com/go/datastore.compareIgnoreFieldMismatchResults(0xc00010c680](http://cloud.google.com/go/datastore.compareIgnoreFieldMismatchResults(0xc00010c680), {0xc0005800c0, 0x2, 0x60500000004?}, {0x0, 0x0, 0xc000214d50?}, {0x0, 0x0}, {0x0, ...}, ...)
	/tmpfs/src/google-cloud-[go/datastore/integration_test.go:387](http://goto.google.com/datastore/integration_test.go:387) +0x436
[cloud.google.com/go/datastore.TestIntegration_IgnoreFieldMismatch.func3(0xc00010c680)](http://cloud.google.com/go/datastore.TestIntegration_IgnoreFieldMismatch.func3(0xc00010c680))
	/tmpfs/src/google-cloud-[go/datastore/integration_test.go:353](http://goto.google.com/datastore/integration_test.go:353) +0x9cc
testing.tRunner(0xc00010c680, 0xc00025cc80)
	/[usr/local/go/src/testing/testing.go:1690](https://cs.corp.google.com/piper///depot/google3/usr/local/go/src/testing/testing.go?l=1690) +0x227
created by testing.(*T).Run in goroutine 172
	/[usr/local/go/src/testing/testing.go:1743](https://cs.corp.google.com/piper///depot/google3/usr/local/go/src/testing/testing.go?l=1743) +0x826
FAIL	[cloud.google.com/go/datastore](http://cloud.google.com/go/datastore)	2.572s
FAIL

[bhshkh]

Test consistently passes in latest builds. No longer flaky