[GROOVY-8560] Spread operator type conversion error

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 2.4.15
• Component/s: groovy-runtime
• Assignee: Unassigned
• Reporter: Petteri Johansson
• Created: 25/Apr/18 12:28
• Updated: 29/Sep/23 17:00

Description

Line 6 with spread operator throws runtime typecast exception:

class Test {
    def test() {
        byte [] b = [0, 0] as byte[]
        Object [] oa = [b] as Object []
        method( oa[0] )
        method( *oa ) //Does not work
    }
    def method(byte[] bytes) {}
}
new Test().test()

 

Result:

Caught: org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast object '[0, 0]' with class 'java.util.ArrayList' to class 'java.lang.Byte'
org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast object '[0, 0]' with class 'java.util.ArrayList' to class 'java.lang.Byte'
at Test.test(test.groovy:7)

Issue Links

• relates to: GROOVY-11182 Primitive array Varargs Java incompatibility