On a Linux aarch64 system, the JDK mainline (commit 475b8943c672349609a4839ce0a02ef995764698) build failed with the following OutOfMemory error:

[2024-09-30T09:32:07,507Z] Error: Java heap space
[2024-09-30T09:32:07,508Z] java.lang.OutOfMemoryError: Java heap space
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.rehash(EntryMap.java:160)
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.put(EntryMap.java:121)
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.rehash(EntryMap.java:166)
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.put(EntryMap.java:121)
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.rehash(EntryMap.java:166)
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.put(EntryMap.java:121)
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.rehash(EntryMap.java:166)
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.put(EntryMap.java:121)
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.rehash(EntryMap.java:166)
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.put(EntryMap.java:121)
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.rehash(EntryMap.java:166)
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.put(EntryMap.java:121)
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.rehash(EntryMap.java:166)
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.put(EntryMap.java:121)
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.rehash(EntryMap.java:166)
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.put(EntryMap.java:121)
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.rehash(EntryMap.java:166)
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.put(EntryMap.java:121)
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.rehash(EntryMap.java:166)
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.put(EntryMap.java:121)
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.rehash(EntryMap.java:166)
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.put(EntryMap.java:121)
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.rehash(EntryMap.java:166)
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.put(EntryMap.java:121)
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.rehash(EntryMap.java:166)
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.put(EntryMap.java:121)
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.rehash(EntryMap.java:166)
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.put(EntryMap.java:121)
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.rehash(EntryMap.java:166)
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.put(EntryMap.java:121)
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.rehash(EntryMap.java:166)
[2024-09-30T09:32:07,508Z] at java.base/jdk.internal.classfile.impl.EntryMap.put(EntryMap.java:121)

Various tests fail on macosx-aarch64 (where the build does not fail already):

java/lang/String/concat/HiddenClassUnloading.java
java/lang/invoke/PermuteArgsTest.java
java/lang/invoke/VarHandles/VarHandleTestMethodType*
java/foreign/TestIntrinsics.java
java/foreign/TestAdaptVarHandles.java