DDC gets confused when Object has static members.

[lrhn]

This CL adds static members to Object.
When building the SDK (tools/build.py -mrelease -ax64 create_sdk) I get the following error:

Command failed: tools/sdks/dart-sdk/bin/dart --dfe=tools/sdks/dart-sdk/bin/snapshots/kernel-service.dart.snapshot pkg/dev_compiler/tool/build_pkgs.dart --analyzer-sdk out/ReleaseX64/gen/utils/dartdevc/ddc_sdk.sum --kernel-sdk out/ReleaseX64/gen/utils/dartdevc/kernel/ddc_sdk.dill --output out/ReleaseX64/gen/utils/dartdevc
output: [error] Static members from supertypes must be qualified by the name of the defining type. (package:path/src/path_map.dart, line 9, col 62)
[error] Static members from supertypes must be qualified by the name of the defining type. (package:path/src/path_set.dart, line 9, col 58)

Please fix all errors before compiling (warnings are okay).

The path package library lines in question are:

/// A map whose keys are paths, compared using [equals] and [hash].

and

/// A set containing paths, compared using [equals] and [hash].

So, the error is in the unmatched reference in the DartDoc. Those should be [Context.equals] and [Context.hash]. However, that doesn't mean that finding the static hash in Object is in any way correct, because it is not visible at that point. The reference here is still just undeclared, it is not magically referencing the static Object.hash, and it is not OK to make it an error.
(Make it an error to have an undeclared reference, but don't invent references that are not there).

Blocking #11617

[lrhn]

Blocking the CL https://dart-review.googlesource.com/c/sdk/+/73360

[lrhn]

Adding area-analyzer since the error code seems to come from the analyzer (UNQUALIFIED_REFERENCE_TO_NON_LOCAL_STATIC_MEMBER in codes.dart), but it is qualified as a warning there, not an error, so I expect it's DDC making it an error.

Side note: Maybe it would be simpler to just not have DDC spend time on analyzing comments. Seems like an unnecessary overhead for a compiler.

[scheglov]

https://dart-review.googlesource.com/c/sdk/+/83223