Implicit override warnings reported for _type_checker_internals.pyi

[correctmost]

Describe the bug
reportImplicitOverride warnings are reported for an internal _type_checker_internals.pyi file when type checking.

Code or Screenshots

test.py:

x=1

pyrightconfig.json:

{
  "reportImplicitOverride": true
}

Running npx pyright test.py produces these warnings:

~/.npm/_npx/110e52990071af13/node_modules/pyright/dist/typeshed-fallback/stdlib/_typeshed/_type_checker_internals.pyi
  ~/.npm/_npx/110e52990071af13/node_modules/pyright/dist/typeshed-fallback/stdlib/_typeshed/_type_checker_internals.pyi:40:9 - error: Method "items" is not marked as override but is overriding a method in class "Mapping[str, object]" (reportImplicitOverride)
  ~/.npm/_npx/110e52990071af13/node_modules/pyright/dist/typeshed-fallback/stdlib/_typeshed/_type_checker_internals.pyi:41:9 - error: Method "keys" is not marked as override but is overriding a method in class "Mapping[str, object]" (reportImplicitOverride)
  ~/.npm/_npx/110e52990071af13/node_modules/pyright/dist/typeshed-fallback/stdlib/_typeshed/_type_checker_internals.pyi:42:9 - error: Method "values" is not marked as override but is overriding a method in class "Mapping[str, object]" (reportImplicitOverride)

VS Code extension or command-line
Command-line version 1.1.401

[jorenham]

For what it's worth; this does not occur when running pyright using https://github.com/RobertCraigie/pyright-python.
But I did encounter these same errors with pyright-action, for example in https://github.com/scipy/scipy-stubs/actions/runs/15169287965/job/42655058438?pr=521. I managed to work around that by adding "/opt/hostedtoolcache/pyright/" to the ignore list in the pyright config.