Unable to build the code-reflection branch using JDK 24 as boot jdk

[Paul Sandoz]

Hi Glavo,

To use 24 as the boot JDK we need merge code-reflection with master, which we want to do anyway and will do so after https://github.com/openjdk/babylon/pull/305 is integrated (hopefully in the next few days).

Paul.

On Apr 3, 2025, at 8:55 AM, Glavo <zjx001202 at gmail.com> wrote:

Hi,

I wanted to try using Babylon/HAT, so I built the JDK based on the latest commit (225e2b7) of the code-reflection branch.
Unfortunately, if I use JDK 24 as the boot jdk, it quickly fails to build with this error:

* For target buildtools_depend__the.COMPILE_DEPEND_batch:
error: cannot access module-info
  bad class file: /modules/java.se/module-info.class<http://java.se/module-info.class>
    bad requires flag: ACC_TRANSITIVE (0x0020
    Please remove or make sure it appears in the correct subdirectory of the classpath.
1 error
* For target buildtools_jdk_tools_classes__the.BUILD_TOOLS_JDK_batch:
error: cannot access module-info
  bad class file: /modules/java.se/module-info.class<http://java.se/module-info.class>
    bad requires flag: ACC_TRANSITIVE (0x0020
    Please remove or make sure it appears in the correct subdirectory of the classpath.
1 error

But I switched to JDK 23.0.2 as the boot jdk and everything worked fine.

Glavo

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