RFR: 8297138: UB leading to crash in Amalloc with optimized builds

[Thomas Stuefe]

On Mon, 28 Nov 2022 11:06:55 GMT, Afshin Zafari <duke at openjdk.org> wrote:

> I have no idea about other possible patches. Please, let me know specifically what should I do?

Guard the free with `ifdef ASSERT`. Even better, check all mentionings of UseMallocOnly and make sure those only apply for debug builds.

Cheers, Thomas

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PR: https://git.openjdk.org/jdk/pull/11320