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我已经克隆了hackernews项目，该项目是由google devs在youtube上的flutter无聊节目系列中开发的。在运行颤动运行时，我得到了这些错误。 The current Dart SDK version is 2.9.2.
Because no versions of test match >1.13.0 =1.16.0-nullsafety requires SDK version >=2.10.0-0 1.13.0 =1.16.0-nullsafety is forbidden.
(1) So, because test >=1.3.0 =1.12.0 =1.3.0 1.13.0 =1.16.0-nullsafety requires boolean_selector ^1.0.0 or test_api 0.2.14.
Because test >=1.14.5 =1.13.0 =1.13.0 =1.15.0 =1.13.0 =1.15.1 =1.15.2 =1.13.0 =1.3.0 1.13.0 =1.16.0-nullsafety requires boolean_selector ^1.0.0 or test_api 0.2.14 (1), test >=1.3.0 =1.16.0-nullsafety requires boolean_selector ^1.0.0 or test_api 0.2.14 or 0.2.15 or 0.2.16 or test_core 0.3.8 or 0.3.9 or 0.3.10.
And because every version of flutter_test from sdk depends on both boolean_selector 2.0.0 and test_api 0.2.17, if flutter_test any from sdk and test >=1.3.0 =1.16.0-nullsafety then test_core 0.3.8 or 0.3.9 or 0.3.10.
(2) So, because test >=1.15.3 =1.3.0 then analyzer ^0.39.5.
Because no versions of built_value_generator match >6.5.0 =6.6.0 =0.34.0 6.5.0 =0.34.0 =6.8.0 =0.34.0 =0.33.3 =6.5.0 =0.33.3 =1.3.0 then analyzer ^0.39.5 (2), one of flutter_test any from sdk or test >=1.3.0 or built_value_generator >=6.5.0 =1.3.0.
So, because hn_app depends on both test ^1.6.1 and flutter_test any from sdk, version solving failed.
Running "flutter pub get" in hn_app...
pub get failed (1; So, because hn_app depends on both test ^1.6.1 and
flutter_test any from sdk, version solving failed.)
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