[GROOVY-6740] Calling a static method of itself in an inner class causes ClassCastException

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.3.0-rc-2
• Fix Version/s: 2.3.4, 2.4.0-beta-2
• Environment: Groovy Version: 2.3.0-rc-2 JVM: 1.8.0_05 Vendor: Oracle Corporation OS: Mac OS X
• Assignee: Paul King
• Reporter: Yasuharu Nakano
• Created: 30/Apr/14 01:20
• Updated: 09/Jul/14 00:38
• Resolved: 09/Jul/14 00:38

Description

class Foo1 {
  static call_directly() {
    foo()
  }
  static call_inClosure() {
    {-> foo() }.call()
  }
  static foo() {
    "FOO"
  }
}
class Foo2 {
  // 'private' and 'static' don't affect this issue.
  class Bar {
    static call_directly() {
      foo()
    }
    static call_inClosure() {
      {-> foo() }.call()
    }
    static call_inClosure_others() {
      {-> Foo1.foo() }.call()
    }
    static foo() {
      "FOO"
    }
  }
}

assert Foo1.call_directly() == 'FOO'
assert Foo1.call_inClosure() == 'FOO' // -- [1]

assert Foo2.Bar.call_directly() == 'FOO'
GroovyAssert.shouldFail(ClassCastException) { // WHY?? -- [2]
  Foo2.Bar.call_inClosure()
}
assert Foo2.Bar.call_inClosure_others() == 'FOO' // -- [3]

[1] It's no problem in a root class.
[2] ClassCastException occurs.
[3] It's no problem to call a other class's static method.