the issues:

- compile of base fails
- some test in controls can't be run

introduced with fix of JDK-8244297 (addition of JMemoryBuddy):

- the new memory test class requires jdk.management
- users of the test class (in controls) need access to its package

a tentative fix is to change the .classpath files:

of base:

<classpathentry kind="src" output="testbin" path="src/test/java">
<attributes>
<attribute name="test" value="true"/>
<attribute name="optional" value="true"/>
<attribute name="module" value="true"/>
<attribute name="add-reads"
value="javafx.base=jdk.management:javafx.base=java.management"/>
</attributes>
</classpathentry>

of controls:

<classpathentry combineaccessrules="false" kind="src" path="/base">
<attributes>
<attribute name="module" value="true"/>
<attribute name="add-exports"
value="javafx.base/test.com.sun.javafx.binding=javafx.controls:javafx.base/test.util.memory=javafx.controls"/>
</attributes>
</classpathentry>


also see discussion in https://mail.openjdk.java.net/pipermail/openjfx-dev/2020-November/028090.html