RFR: 8288754: GCC 12 fails to build zReferenceProcessor.cpp

[Aleksey Shipilev]

On Mon, 20 Jun 2022 17:39:43 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> When compiling with GCC 12.1.1 (current in Fedora rawhide), the following warning-as-error is produced and breaks the build by default:

Oh, we can change that to `Unknown`, no problem there.

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PR: https://git.openjdk.org/jdk19/pull/47