RFR: 8278049: G1: add precondition to set_remainder_to_point_to_start

Wed Dec 1 11:44:27 UTC 2021

On Wed, 1 Dec 2021 09:55:44 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Simple change of converting always-false conditions to assertions.
> 
> Test: hotspot_gc

Please run this through at least tier1-5. This increases the chance to catch potential edge cases quite a bit compared to just `hotspot_gc`.

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PR: https://git.openjdk.java.net/jdk/pull/6630