[GROOVY-6099] @CompileStatic gives ClassCastException at runtime when calling methods on Object in some scenarios

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.1.3
• Fix Version/s: 2.1.4
• Component/s: Static compilation
• Environment: Windows 7, Java 6, Groovy 2.1.3
• Assignee: Cédric Champeau
• Reporter: Brett Borchardt
• Created: 12/Apr/13 17:03
• Updated: 01/Jun/13 06:11
• Resolved: 16/Apr/13 06:54

Description

Execute the following code, it will throw the exception. You can replace the values 1 and [] with any two incompatible types.

MyClass.groovy

@groovy.transform.CompileStatic class MyClass {
    public static void main(String[] args) {
        Object o = getObject()
        if(o == null) {
            o = 1
        } else {
            println o.toString()
        }
    }

    public static Object getObject() {
        ''
    }
}