On Thu, 14 Nov 2024 11:57:52 GMT, Christian Stein <cst...@openjdk.org> wrote:
> Please review this change ensuring all targeted classes in a MR-JAR file > should target the same or a lower classfile version. The [JAR File > Specification](https://docs.oracle.com/javase/9/docs/specs/jar/jar.html#Multi-release) > of JavaSE 9 reads: > >> A class file under a versioned directory, of version N say, in a >> multi-release JAR must have a class file version less than or equal to the >> class file version associated with Nth major version of a Java platform >> release. > > For example, having compiled source files with `javac` 25 without using the > `--release` option (or with `--release 25`) and trying to archive them via a > `jar --create --file a.jar --release 9 ... --release 10 ...` command now > fails with: > > META-INF/versions/9/com/foo/Bar.class has class file version 69.0, but class > file version 53.0 or less is required to target release 9 of the Java Platform > invalid multi-release jar file a.jar deleted > > > This pull request contains fixes to existing tests which produced invalid > MR-JAR files. Most of those fixes are achieved by adding an appropriate > `--release N` option to the associated `javac` call. One of those fixes > rewrites the classfile version bytes between the `javac` and `jar` calls. This pull request has now been integrated. Changeset: bd3c0be3 Author: Christian Stein <cst...@openjdk.org> URL: https://git.openjdk.org/jdk/commit/bd3c0be36d929fab5e5ca0158d53e50b2d206707 Stats: 156 lines in 14 files changed: 48 ins; 32 del; 76 mod 8268611: jar --validate should check targeted classes in MR-JAR files Reviewed-by: jvernee ------------- PR: https://git.openjdk.org/jdk/pull/22103
