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[Benjamin Prosnitz <792492@xxxxxxxxxxxxxxxxxx>]

This appears to not have been fixed in Ubuntu 12.04

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https://bugs.launchpad.net/bugs/792492

Title:
  Inference with wildcard types causes selection of inapplicable method

Status in “openjdk-6” package in Ubuntu:
  Confirmed

Bug description:
  $ lsb_release -rd
  Description:	Ubuntu 11.04
  Release:	11.04
  $ java -version
  java version "1.6.0_22"
  OpenJDK Runtime Environment (IcedTea6 1.10.1) (6b22-1.10.1-0ubuntu1)
  OpenJDK 64-Bit Server VM (build 20.0-b11, mixed mode)

  Running javac against "Comp.java" (attached):
  $ javac Comp.java 
  Comp.java:24: invalid inferred types for T; actual arguments do not conforms to inferred formal arguments
  required: java.lang.Iterable<? extends java.util.Comparator<? super java.lang.String>>
  found: java.util.List<java.util.Comparator<?>>
      Comparator<String> c3 = compound(x);
                                      ^
  1 error

  This error should not occur (successful compilation should result).

  This issue was a bug in javac that has since been fixed: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6638712
  It was fixed in OpenJDK 6 1.10: http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=648

  Seeing as Ubuntu has 1.10.1, the bug should be fixed for it - but it
  is still present.

  In the OpenJDK Ubuntu package changelog, I see that this particular
  change was reverted for Maverick:
  https://launchpad.net/ubuntu/+source/openjdk-6/6b20-1.9.2-0ubuntu2 I
  wonder if somehow the reversion persisted for Natty.

  This problem is pretty major, as it means Ubuntu's shipping javac is
  not able to compile a variety of valid Java source.

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