[GROOVY-9872] GroovyCastException when using a map while iterating over something in a @CompileStatic object

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.5.14
• Fix Version/s: 2.5.15
• Component/s: groovy-jdk
• Assignee: Eric Milles
• Reporter: Simon Rehm
• Created: 22/Dec/20 16:15
• Updated: 03/Feb/22 22:48
• Resolved: 22/Dec/20 19:04

Description

This odd code works fine in 2.5.13, but explodes in 2.5.14.
My workaround for now is to remove @CompileStatic in production.

Minimal example (spock test):

import groovy.transform.CompileStatic
import spock.lang.Specification

class FooTest extends Specification {
    def "test"() {
        when:
        new Foo()

        then:
        noExceptionThrown()
    }
}

@CompileStatic
class Foo {
    private Map<String, String> cache = [:]
    Foo() {
        [''].each {
            cache[''] = ''
        }
    }
}

 Minimal example without Spock, while settings stuff in a map in an .each-iteration outside of Constructor:

new Foo().init()

@CompileStatic
class Foo {

    private Map<String, String> cache = [:]
    Foo() {
    }

    void init() {
        [''].each {
            cache[it] = it
        }
    }
}

 

 

Full Error:

Expected no exception to be thrown, but got 'org.codehaus.groovy.runtime.typehandling.GroovyCastException'	at spock.lang.Specification.noExceptionThrown(Specification.java:118)
	at FooTest.test(FooTest.groovy:10)
Caused by: org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast object 'Foo$_closure1@3fa2213' with class 'Foo$_closure1' to class 'Foo'
	at Foo$_closure1.doCall(FooTest.groovy:19)
	at Foo.<init>(FooTest.groovy:18)
	at FooTest.test(FooTest.groovy:7)

 

Issue Links

• Blocked: GROOVY-9771 STC: "putAt" shortcut notation to outer class private field from Closure leads to GroovyCastException