RFR: 8260892: Compilation fails: lambda parameter not visible in body when generics involved

[Jan Lahoda]

On Mon, 1 Aug 2022 23:37:39 GMT, Vicente Romero <vromero at openjdk.org> wrote:

> This bug is being produced because as the diamond expression can't be attributed until the inference has been done. A listener is registered in the corresponding inference context but the way the current environment is being copied into `dupLocalEnv` produces a copy that shares info with the outer lambda expression. The lambda expression removes the argument from the shared scope before the listener is fired and thus the error. The proposal is to use a different way to copy the environment into `dupLocalEnv` by producing a brand new scope.
> 
> TIA

Looks reasonable to me.

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Marked as reviewed by jlahoda (Reviewer).

PR: https://git.openjdk.org/jdk/pull/9710