eclipse-jdt / eclipse-jdt/eclipse.jdt.core

Strange errors about missing java.lang.reflect

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Description

This the second time this week that I update an installation from 2023-09 to 2023-12 and end up with a bunch strange errors about missing class:

![image](https://github.com/eclipse-jdt/eclipse.jdt.core/assets/208716/3771de4f-2781-436c-a738-169396198c44)

They do exist though:

![image](https://github.com/eclipse-jdt/eclipse.jdt.core/assets/208716/9190674b-8bf1-43d4-a218-c0c97e020c03)

Maybe too many JREs:

![image](https://github.com/eclipse-jdt/eclipse.jdt.core/assets/208716/532f51e2-5881-423a-9b6d-f268762fc9a3)

Maybe because Java 11 is bound to an actual Java 11 JRE?

![image](https://github.com/eclipse-jdt/eclipse.jdt.core/assets/208716/9df861e9-4e33-4cf7-940c-91eb23c0d659)

Deleting the other ones make the problem go away:

![image](https://github.com/eclipse-jdt/eclipse.jdt.core/assets/208716/e364eea2-e638-4cce-8783-50390809a6cf)

I don't know how to reproduce this. Feel free to close it. I just though it best to record this given it's happened twice and it took me quite long to figure out how to get rid of it the first time.

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