Bug in JDK25 with switch statements

[Rafael Winterhalter]

(And of course, this is the right list, I originally thought to post this
to the HotSpot list, but this happens in interpreted mode, so I excluded
that.)

Am Fr., 21. März 2025 um 11:14 Uhr schrieb Rafael Winterhalter <
rafael.wth at gmail.com>:

> The error is stable and can be reproduced by simply building the project.
> But it seems to be an issue with javac indeed. The tableswitch statement is
> compiled as follows.
>
>        213: tableswitch   { // 100 to 116
>                      100: 322
>                      101: 296
>                      102: 361
>                      103: 335
>                      104: 348
>                      105: 309
>                      106: 374
>                      107: 374
>                      108: 374
>                      109: 374
>                      110: 374
>                      111: 374
>                      112: 374
>                      113: 374
>                      114: 374
>                      115: 374
>                      116: 374
>                  default: 374
>
> The right branch for 'p' is included at offset 361, but 'p' is an integer
> value of 109. The character 102 (f) is not included in the Java source.
>
> I guess this is the wrong mailing list in this case. I will post this to
> the javac list.
>
> Thanks, Rafael
>
> Am Fr., 21. März 2025 um 10:54 Uhr schrieb Remi Forax <forax at univ-mlv.fr>:
>
>> Hello Raphael,
>> It may be hard to reproduce,
>> can you do a javap -c on the class/method so it will be easier to see if
>> the generated bytecode is wrong of if it's a VM issue.
>>
>> regards,
>> Rémi
>>
>> ------------------------------
>>
>> *From: *"Rafael Winterhalter" <rafael.wth at gmail.com>
>> *To: *"compiler-dev" <compiler-dev at openjdk.org>
>> *Sent: *Friday, March 21, 2025 10:20:48 AM
>> *Subject: *Bug in JDK25 with switch statements
>>
>> Hello,
>> my project Byte Buddy fails to build with recent JDK 25s. I am not sure
>> if this is a known bug, but I wanted to mention it:
>> https://github.com/raphw/byte-buddy/actions/runs/13975513319/job/39131008617
>>
>> The reason for the build failure is that this switch statement ends up in
>> the default branch:
>> https://github.com/raphw/byte-buddy/blob/master/byte-buddy-dep/src/main/java/net/bytebuddy/asm/Advice.java#L3239
>>
>> This is happening for the char 'p' which is the last legal branch of the
>> switch. This does not yield an error on JDKs 5 to 24, so this must be
>> introduced recently.
>>
>> Thanks, Rafael
>>
>>
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