[FLINK-33310] Scala before 2.12.18 doesn't compile on Java 21

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.19.0
• Labels: pull-request-available
• Assignee: Sergey Nuyanzin
• Reporter: Sergey Nuyanzin
• Created: 18/Oct/23 22:20
• Updated: 22/Oct/23 20:00
• Resolved: 22/Oct/23 20:00

Description

It fails with

[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 ==

based on release notes 2.12.18 - the first 2.12.x supporting jdk21
https://github.com/scala/scala/releases/tag/v2.12.18

Issue Links

• links to: GitHub Pull Request #23548