RFR: JDK-8312218: Print additional debug information when hitting assert(in_hash)

[Eric Nothum]

On Tue, 25 Jul 2023 15:35:47 GMT, Eric Nothum <duke at openjdk.org> wrote:

> Since it can be hard to reproduce the hitting assert(in_hash), I have added additional debug information that is dumped when hitting the assert. Additional to the previous message, the current graph and the node causing the assertion failure will now be dumped.

Added a new line between the graph and node dump for better readability

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PR Comment: https://git.openjdk.org/jdk/pull/15022#issuecomment-1651158401