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Release: java_tools v20.0 with Error Prone 2.50.0 #101

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@davido

Link to relevant issue and/or commit:
bazelbuild/bazel#29805 — bumped Error Prone to2.50.0 in bazel MODULE.bazel (commit 316c22bfda, 2026-06-18).

Related: bazelbuild/bazel#30513 (raising the java_toolchain tools min JDK to 25) is active work that would also produce a new java_tools release from current master.

Other details:

No cherry-pick needed. This is a dependency-currency request, not a fix for a regression; it can ride the normal release cadence.

The latest released java_tools, v19.0 (2026-02-10), bundles Error Prone 2.46.0 in JavaBuilder (verified via
META-INF/maven/com.google.errorprone/error_prone_core/pom.properties in JavaBuilder_deploy.jar). bazel master has since moved to 2.50.0 (#29805), but no java_tools release has been cut since v19.0, so every rules_java release from 9.5.0 through 9.7.0 still pins v19.0 and ships Error Prone 2.46.0 to downstream projects.

A release from current master would make 2.50.0 available to rules_java.

cc @bazelbuild/triage

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