[Bug 1808383] Re: Java 9+ multi-release jars are not supported in ant tasks

[Mathew Hodson]

** Tags added: patch patch-accepted-upstream

** Changed in: ant (Ubuntu Xenial)
   Importance: Undecided => Medium

** Changed in: ant (Ubuntu Bionic)
   Importance: Undecided => Medium

** Changed in: ant (Ubuntu Cosmic)
   Importance: Undecided => Medium

** Changed in: ant (Ubuntu Disco)
   Importance: Undecided => Medium

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Title:
  Java 9+ multi-release jars are not supported in ant tasks

Status in ant package in Ubuntu:
  Confirmed
Status in ant source package in Xenial:
  New
Status in ant source package in Bionic:
  New
Status in ant source package in Cosmic:
  New
Status in ant source package in Disco:
  Confirmed

Bug description:
  Reproduced in release: Ubuntu 18.04.1 LTS
  Version of ant used: 1.10.3-1ubuntu0.1

  Having a multi-release jar with different .class files for Java 8 and
  Java 9, when using this jar in a custom ant task and running in Java
  9+, the Java 8 class file will be loaded instead of the Java 9 one.
  This may lead to errors when the older class uses a deprecated/removed
  API.

  This can be easily reproduced using the code pushed to this
  repository: https://github.com/katanagari7c1/ant-mrjar-support-test

  This issue have already been reported in the ant bug tracker:
  https://bz.apache.org/bugzilla/show_bug.cgi?id=62952

  It has already been fixed and will be introduced in next release 1.10.6:
  https://github.com/apache/ant/commit/593aff2d2ea52a025cfe7da32155216719029a7d

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