Hashcode needs to be reset to -1 to force its recalculation on next call, after deserialization.
The change in the readResolve() method is the fix for this problem. While here I added similar lines in other methods that may update fields (although these are noted as not supported, they change a class named "immutable). Added a test. There is a test for serialization for this class, but I found it clearer to add the test for this specific recently discovered issue in its own test file. ------------- Commit messages: - spelling - Exception name - whitespace - whitespace - 8358624: ImmutableDescriptor violates equals/hashCode contract after deserialization Changes: https://git.openjdk.org/jdk/pull/25758/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=25758&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8358624 Stats: 82 lines in 2 files changed: 82 ins; 0 del; 0 mod Patch: https://git.openjdk.org/jdk/pull/25758.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/25758/head:pull/25758 PR: https://git.openjdk.org/jdk/pull/25758
