Failed when build spring3 framework with gradle

I tried to build spring 3 framework using gradle, in ubuntu 12.04. but there was an error when build aspects progress. the error is as follow:

[ant:iajc] <Unknown> [warning] Found @DeclareAnnotation while current release does not support it (see 'org.aspectj.weaver.bcel.AtAjAttributes')
/home/hendri/spring-framework/spring-expression/src/main/java/org/springframework/expression/spel/ast/ error: unmappable character for encoding UTF8
 * <p>If any of the operands is of a reference type, unboxing conversion (�5.1.8) is performed. Then:<br>
1 error

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':spring-expression:javadoc'.
> Javadoc generation failed.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.


Total time: 24 mins 10.5 secs

can somebody help me to pass this error and build the spring 3 framework?? thanks..


Try update the Spring code. If that not works take a look at what encoding are you compiling against.

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