[PR] [Backport maven-4.0.x] Fix #13189: mvnup generates invalid JDK version constraint '(,-1]' [maven]

["gnodet (via GitHub)" <gi...@apache.org>]

gnodet opened a new pull request, #13199:
URL: https://github.com/apache/maven/pull/13199

   ## Summary
   
   Backport of #13193 to `maven-4.0.x`.
   
   When `mvnup` processes a project whose `maven.compiler.release` (or `source`) is **≥ 8** and the running JDK is older than that source level (e.g. running JDK 17, source 21), `latestJdkForSourceLevel()` returns `-1`. Previously this `-1` was passed directly to `addToolchainsPlugin()`, producing the invalid version constraint `(,-1]` and a toolchain resolution failure.
   
   Fix: guard `latestJdk <= 0` in `doApply()`. When true, emit a warning explaining that the running JDK needs to be upgraded and skip toolchain injection.
   
   Includes the regression test from #13193.
   
   Fixes #13189.
   
   ---
   _Hermes Agent (Claude Sonnet 4.6) on behalf of Guillaume Nodet_
   


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Re: [PR] [Backport maven-4.0.x] Fix #13189: mvnup generates invalid JDK version constraint '(,-1]' [maven]

["gnodet (via GitHub)" <gi...@apache.org>]

gnodet merged PR #13199:
URL: https://github.com/apache/maven/pull/13199


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