Affects only EpsilonGC. Thus a P3.
Work around is to avoid *creating* AOT cache with -XX:+EpsilonGC. You can still *use* the AOT cache with -XX:+EpsilonGC

===========
Reproduces reliably in current mainline.

$ cat HelloStream.java
import java.util.*;
import java.util.stream.*;

public class HelloStream {
    public static void main(String ... args) {
        var words = List.of("hello", "fuzzy", "world");
        var greeting = words.stream()
            .filter(w -> !w.contains("z"))
            .collect(Collectors.joining(", "));
        System.out.println(greeting); // hello, world
    }
}

$ javac HelloStream.java

$ rm -f app.aot*; build/linux-x86_64-server-fastdebug/images/jdk/bin/java -XX:AOTMode=record -XX:AOTConfiguration=app.aotconf -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC -Xmx64m -Xms64m HelloStream; build/linux-x86_64-server-fastdebug/images/jdk/bin/java -XX:AOTMode=create -XX:AOTConfiguration=app.aotconf -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC -Xmx64m -Xms64m -XX:AOTCache=app.aot HelloStream
hello, world
[0.271s][warning][cds] Skipping HelloStream: Unsupported location
#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00007cbb79c28f80, pid=971605, tid=971608
#
# JRE version: OpenJDK Runtime Environment (25.0) (fastdebug build 25-internal-adhoc.shade.jdk)
# Java VM: OpenJDK 64-Bit Server VM (fastdebug 25-internal-adhoc.shade.jdk, interpreted mode, compressed oops, compressed class ptrs, epsilon gc, linux-amd64)
# Problematic frame:
# V [libjvm.so+0x628f80] AOTClassLinker::class_category_name(Klass*)+0x50
#
# Core dump will be written. Default location: Core dumps may be processed with "/usr/share/apport/apport -p%p -s%s -c%c -d%d -P%P -u%u -g%g -- %E" (or dumping to /home/shade/trunks/jdk/core.971605)
#
# An error report file with more information is saved as:
# /home/shade/trunks/jdk/hs_err_pid971605.log
#
# If you would like to submit a bug report, please visit:
# https://bugreport.java.com/bugreport/crash.jsp
#
Aborted (core dumped)