The test is run with:

command: main -Xmx300m FragmentMetaspace

Perhaps we should increase the -Xmx value? See comments for details.

and fails sometimes with:

java.lang.OutOfMemoryError: Java heap space
at jdk.compiler/com.sun.tools.javac.util.Position$LineMapImpl.build(Position.java:156)
at jdk.compiler/com.sun.tools.javac.util.Position.makeLineMap(Position.java:80)
at jdk.compiler/com.sun.tools.javac.parser.JavaTokenizer.getLineMap(JavaTokenizer.java:776)
at jdk.compiler/com.sun.tools.javac.parser.Scanner.getLineMap(Scanner.java:127)
at jdk.compiler/com.sun.tools.javac.parser.JavacParser.parseCompilationUnit(JavacParser.java:3289)
at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.parse(JavaCompiler.java:639)
at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.parse(JavaCompiler.java:676)
at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.parseFiles(JavaCompiler.java:1026)
at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:939)
at jdk.compiler/com.sun.tools.javac.main.Main.compile(Main.java:311)
at jdk.compiler/com.sun.tools.javac.main.Main.compile(Main.java:170)
at jdk.compiler/com.sun.tools.javac.Main.compile(Main.java:75)
at jdk.compiler/com.sun.tools.javac.api.JavacTool.run(JavacTool.java:208)
at GeneratedClassLoader.getGeneratedClass(GeneratedClassLoader.java:148)
at GeneratedClassLoader.getGeneratedClasses(GeneratedClassLoader.java:195)
at FragmentMetaspace.runGrowing(FragmentMetaspace.java:64)
at FragmentMetaspace.main(FragmentMetaspace.java:45)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:115)
at java.base/java.lang.Thread.run(Thread.java:834)