According to Maven 3.0.4 (maybe other versions) there is an invalid version 
range in the 2.3 POM in the doclint-java8-disable profile.

      <activation>
        <jdk>[1.8,</jdk>
      </activation>

should possibly be 

      <activation>
        <jdk>[1.8,)</jdk>
      </activation>

What steps will reproduce the problem?
1. Create a maven project that depends on gson 2.3
2. Try and build

What is the expected output? What do you see instead?

It should build. Instead I get errors like "Invalid JDK version in profile 
'doclint-java8-disable': Unbounded range [1.8, for project 
com.google.code.gson:gson [etc]"

What version of the product are you using? On what operating system?

gson 2.3 with JDK 7 and Maven 3.0.4

Please provide any additional information below.
Seems to be a common error, I'd guess copy and pasted from Stack Overflow.
https://github.com/junit-team/junit/issues/965
https://github.com/atteo/parent/issues/1

http://maven.apache.org/enforcer/enforcer-rules/versionRanges.html implies it 
must have the trailing parenthese.