new java.util.Date().format("MM") method issue while running the report on Jasptsoft studio 8.2.0

Issue :
 

In latest Jaspersoft studio 8.2.0 when running the report will get below format() method error. 

The same reports run in older version of Jaspersoft studio (i.e. 6.4.2)

Error :
 

Full error log attached with "studio_820_error.txt".

--------------------------------------------------------------------------------
net.sf.jasperreports.engine.JRException: Errors were encountered when compiling report expressions class file:
1. The method format(String) is undefined for the type Date
                value = new java.util.Date().format("MM") == "01" ? "09" : //$JR_EXPR_ID=1$
                                             <---->
2. The method format(String) is undefined for the type Date
new java.util.Date().format("MM") == "02" ? "10" : //$JR_EXPR_ID=1$
                     <---->
.
.
18. Syntax error on token "[", { expected
                value = ["H01 ","H02 ","H03 ","H04 ","H05 ","H11 ","H12 ","H13 ","H20 ","H21 ","H22 ","H23 ","H24 ","H25 ","H26 ","H27 ","H28 ","H31 ","H32 ","H40 ","H43 ","H44 ","H57 ","H59 ","H61 ","H63 ","H65 ","H66 ","H68 ","H69 ","H73 ","H75 ","H76 ","H78 ","H79 ","H81 ","H82 ","H85 ","H87 ","H88 ","H89 ","H90 ","H92 ","H96 ","H99 "]; //$JR_EXPR_ID=7$
                        ^
--------------------------------------------------------------------------------

Resolution :
 

This is not a bug in Jaspersoft studio rather there was breaking changes in the Groovy languag 2.5, and as a part of "groovy_3.0.7.jar" these changes introduced in JRL 6.17.0.
As a apart of beaking changes "format()" method  is no longer available in updated groovy jar version.

In order to resolve this, need to put the groovy jar "groovy-dateutil-3.0.7.jar" in the studio 8.2.0 installation plugin directory (PFA : "groovy_jar_copy_location.PNG").

We have tested with this and we could see the collection parameter popullated without format() error message. (PFA : "studio_820_sucess.PNG")

The attached "groovy-dateutil-3.0.7.jar"  jar file need to put in the plugin studio directory and restart the studio software.

groovy-dateutil-3.0.7.jar