Wrong Stack map table exception with Class-File API under JDK 25

[martinliu99]

I met below exception with Class-File API.

With attached sample code, you can reproduce it. If explicitly defined AsmClassReader & AsmClassWriter, the code works well.
ClassFileApiTests.java

[raphw]

Are you using an outdated version of Byte Buddy? For 25, Byte Buddy would use ASM by default with the latest version. I also tried your example with the latest version and do not get the issue.

[martinliu99]

Hi raphw, I found the root cause - it's not a Byte Buddy issue.

The problem is that my code sets:

System.setProperty("net.bytebuddy.processor",
AsmClassReader.Factory.Default.CLASS_FILE_API_FIRST.toString());

Under jdk25，this causes inconsistent initialization:

• AsmClassReader.Factory.Default.factory → ASM_FIRST
• AsmClassWriter.Factory.Default.factory → CLASS_FILE_API_FIRST

Setting the property to "CLASS_FILE_API_ONLY" (string literal) fixes the issue
by keeping both Reader and Writer in sync.

Thanks for your time.