lib/html/js_typed_interop* tests failing

[scheglov]

analyzer-asserts-strong-linux:lib/html/js_typed_interop_side_cast_exp_test/01 broke (Pass -> CompileTimeError, expected Pass)
analyzer-asserts-strong-linux:lib/html/js_typed_interop_side_cast_exp_test/none broke (Pass -> CompileTimeError, expected Pass)
analyzer-asserts-strong-linux:lib/html/js_typed_interop_type2_test/01 broke (Pass -> CompileTimeError, expected Pass)
analyzer-asserts-strong-linux:lib/html/js_typed_interop_type2_test/none broke (Pass -> CompileTimeError, expected Pass)
analyzer-asserts-strong-linux:lib/html/js_typed_interop_type3_test/01 broke (Pass -> CompileTimeError, expected Pass)
analyzer-asserts-strong-linux:lib/html/js_typed_interop_type3_test/02 broke (Pass -> CompileTimeError, expected Pass)
analyzer-asserts-strong-linux:lib/html/js_typed_interop_type3_test/none broke (Pass -> CompileTimeError, expected Pass)
analyzer-asserts-weak-linux:lib/html/js_typed_interop_side_cast_exp_test/01 broke (Pass -> CompileTimeError, expected Pass)
analyzer-asserts-weak-linux:lib/html/js_typed_interop_side_cast_exp_test/none broke (Pass -> CompileTimeError, expected Pass)
analyzer-asserts-weak-linux:lib/html/js_typed_interop_type2_test/01 broke (Pass -> CompileTimeError, expected Pass)
analyzer-asserts-weak-linux:lib/html/js_typed_interop_type2_test/none broke (Pass -> CompileTimeError, expected Pass)
analyzer-asserts-weak-linux:lib/html/js_typed_interop_type3_test/01 broke (Pass -> CompileTimeError, expected Pass)
analyzer-asserts-weak-linux:lib/html/js_typed_interop_type3_test/02 broke (Pass -> CompileTimeError, expected Pass)
analyzer-asserts-weak-linux:lib/html/js_typed_interop_type3_test/none broke (Pass -> CompileTimeError, expected Pass)

See the log for details.

For example:

===============================================================================================================================\
| analyzer-asserts-strong-linux:lib/html/js_typed_interop_side_cast_exp_test/01 broke (Pass -> CompileTimeError, expected Pass) |
\===============================================================================================================================/

--- Command "dart2analyzer" (took 50ms):
DART_CONFIGURATION=ReleaseX64NNBD out/ReleaseX64NNBD/dart-sdk/bin/dartanalyzer --experimental-trust-js-interop-type-annotations --enable-experiment=non-nullable --ignore-unrecognized-flags --packages=/b/s/w/ir/cache/builder/sdk/.packages --format=machine --no-hints /b/s/w/ir/cache/builder/sdk/out/ReleaseX64NNBD/generated_tests/lib/html/js_typed_interop_side_cast_exp_test_01.dart

exit code:
1

stderr:
ERROR|COMPILE_TIME_ERROR|MISSING_DEFAULT_VALUE_FOR_PARAMETER|/b/s/w/ir/cache/builder/sdk/out/ReleaseX64NNBD/generated_tests/lib/html/js_typed_interop_side_cast_exp_test_01.dart|34|27|1|The parameter 'x' can't have a value of 'null' because of its type, so it must either be a required parameter or have a default value.
ERROR|COMPILE_TIME_ERROR|MISSING_DEFAULT_VALUE_FOR_PARAMETER|/b/s/w/ir/cache/builder/sdk/out/ReleaseX64NNBD/generated_tests/lib/html/js_typed_interop_side_cast_exp_test_01.dart|20|27|1|The parameter 'x' can't have a value of 'null' because of its type, so it must either be a required parameter or have a default value.
ERROR|COMPILE_TIME_ERROR|MISSING_DEFAULT_VALUE_FOR_PARAMETER|/b/s/w/ir/cache/builder/sdk/out/ReleaseX64NNBD/generated_tests/lib/html/js_typed_interop_side_cast_exp_test_01.dart|27|27|1|The parameter 'x' can't have a value of 'null' because of its type, so it must either be a required parameter or have a default value.

--- Re-run this test:
python tools/test.py -n analyzer-asserts-strong-linux lib/html/js_typed_interop_side_cast_exp_test/01

The error at the line 20 is for x here, it is named and no required, so the spec says that this is an error.

@JS()
@anonymous
class A {
  external int get x;
  external factory A({int x});
}