Failures on [co19] Roll co19 to def1183bacc28f008db4fdd3d0442ed05f1889f8

[athomas]

There are new test failures on [co19] Roll co19 to def1183bacc28f008db4fdd3d0442ed05f1889f8. Please triage the failures here:
https://dart-ci.firebaseapp.com/cl/134701/1

[sgrekhov]

Triaged. Results are

analyzer-asserts-strong-linuxCompileTimeError -> Pass (expected StaticWarning)
✔ co19/LanguageFeatures/nnbd/null_aware_operator_A13_t13	https://github.com/dart-lang/sdk/40557
Pass -> CompileTimeError (expected Pass)
✔ co19/LanguageFeatures/nnbd/override_checking_A01_RETURN_t09	Test fixed
new test -> CompileTimeError (expected Pass)
✔ co19/LanguageFeatures/nnbd/override_checking_A01_CLASSPARAM_t32	https://github.com/dart-lang/sdk/40398
✔ co19/LanguageFeatures/nnbd/override_checking_A02_REQ_ARGS_t24	Test fixed
new test -> MissingCompileTimeError (expected Pass)
✔ co19/LanguageFeatures/nnbd/null_check_operator_A04_t01
✔ co19/LanguageFeatures/nnbd/override_checking_A06_t02	https://github.com/dart-lang/sdk/39678
✔ co19/LanguageFeatures/nnbd/override_checking_A06_t04	https://github.com/dart-lang/sdk/39678
✔ co19/LanguageFeatures/nnbd/override_checking_A06_t07	https://github.com/dart-lang/sdk/40454
✔ co19/LanguageFeatures/nnbd/override_checking_A06_t08	https://github.com/dart-lang/sdk/39678
✔ co19/LanguageFeatures/nnbd/override_checking_A06_t11	https://github.com/dart-lang/sdk/40454
✔ co19/LanguageFeatures/nnbd/override_checking_A06_t14	https://github.com/dart-lang/sdk/40454
✔ co19/LanguageFeatures/nnbd/override_checking_A06_t17	https://github.com/dart-lang/sdk/40454
✔ co19/LanguageFeatures/nnbd/override_checking_A06_t19	https://github.com/dart-lang/sdk/40454
✔ co19/LanguageFeatures/nnbd/override_checking_A06_t20	dart-lang/sdk#39678
✔ co19/LanguageFeatures/nnbd/override_checking_A06_t21	dart-lang/sdk#40454
✔ co19/LanguageFeatures/nnbd/override_checking_A06_t23	dart-lang/sdk#40454
new test -> StaticWarning (expected Pass)
✔ co19/LanguageFeatures/nnbd/override_checking_A02_REQ_ARGS_t22	Test fixed
✔ co19/LanguageFeatures/nnbd/override_checking_A02_REQ_ARGS_t26	Test fixed
analyzer-asserts-strong-linuxcfe-weak-linuxdartdevk-strong-linux-release-chromenew test -> CompileTimeError (expected Pass)
✔ co19/LanguageFeatures/nnbd/override_checking_A01_CLASSPARAM_t34	dart-lang/sdk#39666
✔ co19/LanguageFeatures/nnbd/override_checking_A01_CLASSPARAM_t39	dart-lang/sdk#40389
✔ co19/LanguageFeatures/nnbd/override_checking_A01_GETTER_t23	dart-lang/sdk#40389
cfe-weak-linuxdartdevk-strong-linux-release-chromenew test -> CompileTimeError (expected Pass)
✔ co19/LanguageFeatures/nnbd/override_checking_A01_CLASSPARAM_t33	dart-lang/sdk#39666
✔ co19/LanguageFeatures/nnbd/override_checking_A01_CLASSPARAM_t37	dart-lang/sdk#39666
✔ co19/LanguageFeatures/nnbd/override_checking_A01_CLASSPARAM_t38	dart-lang/sdk#39666
✔ co19/LanguageFeatures/nnbd/override_checking_A01_FIELD_t31	dart-lang/sdk#40389
✔ co19/LanguageFeatures/nnbd/override_checking_A01_RETURN_t23	dart-lang/sdk#40389
dartdevk-strong-linux-release-chromenew test -> CompileTimeError (expected Pass)
✔ co19/LanguageFeatures/nnbd/override_checking_A06_t10	dart-lang/sdk#40481
✔ co19/LanguageFeatures/nnbd/override_checking_A06_t13	dart-lang/sdk#40481