Backport "Use result of lambda type of implicit in CheckUnused" to 3.3 LTS #504
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Fixes scala#23494 When inspecting unused implicit parameters, the check skips parameters which are "marker traits". It tests for any members of the type (or its upper bound) which are not "universal members". This commit uses the `resultType` to avoid an error ``` invalid new prefix ``` while computing members where the type is a `LambdaType`. A future improvement would be not to request `allMembers`, since the check only needs to find one that is not universal. The necessitating change was scala@2e4bc0a.
Fixes scala#23494 When inspecting unused implicit parameters, the check skips parameters which are "marker traits". It tests for any members of the type (or its upper bound) which are not "universal members". This commit uses the `resultType` to avoid an error ``` invalid new prefix ``` while computing members where the type is a `LambdaType`. A future improvement would be not to request `allMembers`, since the check only needs to find one that is not universal. The necessitating change was scala@2e4bc0a. [Cherry-picked a5e15ab][modified]
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Backports scala#23497 to the 3.3.7.
PR submitted by the release tooling.
[skip ci]