[GROOVY-7758] GroovyCastException when both @CompileStatic and @Newify are used

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.4.5
• Fix Version/s: 2.4.7
• Component/s: Static compilation
• Assignee: Shil Sinha
• Reporter: Natsuki Takanashi
• Created: 17/Feb/16 12:54
• Updated: 12/Jun/16 08:45
• Resolved: 18/Mar/16 12:35

Description

The following code gives GroovyCastException.

class Main {
  public static void main(String... args) {
    Test test = new Test()
  }
}

@CompileStatic @Newify
class Test {
  private HashMap<String, A> hashMap = [:]
  public Test() {
    set()
    test()
  }
  public void test() {
    hashMap.each() { String string, A a ->
      a.printString()
    }
  }
  public void set() {
    hashMap.put("aaa", B.new("xxx"))
    hashMap.put("bbb", B.new("yyy"))
  }
}

class A {
  public String string = ""
  public void printString() {
    println(string)
  }
}

class B extends A {
  public B(String string) {
    this.string = string
  }
}

The code below is a part of the decompiled Test.class. Groovy tries to cast this instead of a.

public Object doCall(String string, A a) {
  ((A)ScriptBytecodeAdapter.castToType(((_test_closure1)this).getThisObject(), A.class)).printString();
  return null;
}

When @CompileStatic is omitted, or when @Newify is omitted and B.new is replaced by new B, the code above gives no exception and runs as expected.