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https://issues.apache.org/jira/browse/FLINK-33310?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17778464#comment-17778464
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Sergey Nuyanzin commented on FLINK-33310:
-----------------------------------------
Merged as
[6cdfca2a6aba1a387b866d9358df9c1ee7f1c138|https://github.com/apache/flink/commit/6cdfca2a6aba1a387b866d9358df9c1ee7f1c138]
> Scala before 2.12.18 doesn't compile on Java 21
> -----------------------------------------------
>
> Key: FLINK-33310
> URL: https://issues.apache.org/jira/browse/FLINK-33310
> Project: Flink
> Issue Type: Sub-task
> Reporter: Sergey Nuyanzin
> Priority: Major
> Labels: pull-request-available
>
> It fails with
> {noformat}
> [ERROR] error:
> [INFO] bad constant pool index: 0 at pos: 48445
> [INFO] while compiling: <no file>
> [INFO] during phase: globalPhase=<no phase>, enteringPhase=<some
> phase>
> [INFO] library version: version 2.12.15
> [INFO] compiler version: version 2.12.15
> ...
> [INFO] last tree to typer: EmptyTree
> [INFO] tree position: <unknown>
> [INFO] tree tpe: <notype>
> [INFO] symbol: null
> [INFO] call site: <none> in <none>
> [INFO]
> [INFO] == Source file context for tree position ==
> {noformat}
> based on release notes 2.12.18 - the first 2.12.x supporting jdk21
> https://github.com/scala/scala/releases/tag/v2.12.18
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