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https://issues.apache.org/jira/browse/GROOVY-11471?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Paul King closed GROOVY-11471.
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> Assignments in closures can introduce issues in flow typing
> -----------------------------------------------------------
>
> Key: GROOVY-11471
> URL: https://issues.apache.org/jira/browse/GROOVY-11471
> Project: Groovy
> Issue Type: Bug
> Components: Static Type Checker
> Reporter: Thodoris Sotiropoulos
> Assignee: Eric Milles
> Priority: Minor
> Fix For: 5.0.0-alpha-10
>
>
> I have the following program
> {code:java}
> class Test {
> public static void main(String[] args) {
> def x = 1
> Closure m = null
> if (true) {
> m = {x = ""}
> }
> x = 1
> m()
> }
> } {code}
> h3. Actual behavior
> The code compiles, but I get ClassCastException at runtime
> {code:java}
> Exception in thread "main"
> org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast
> object '' with class 'java.lang.String' to class 'java.lang.Integer'
> at
> org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.castToNumber(DefaultTypeTransformation.java:177)
> at
> org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.continueCastOnNumber(DefaultTypeTransformation.java:294)
> at
> org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.castToType(DefaultTypeTransformation.java:248)
> at
> org.codehaus.groovy.vmplugin.v8.IndyInterface.fromCache(IndyInterface.java:336)
> at Test$_main_closure1.doCall(test.groovy:6)
> at Test$_main_closure1.call(test.groovy)
> at Test.main(test.groovy:9)
> {code}
> h3. Expected behavior
> The code should have been rejected.
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