[GROOVY-11011] SC: array instanceof guard and length or subscript

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.5.22, 3.0.17, 4.0.11
• Fix Version/s: 3.0.18, 4.0.12
• Component/s: Static compilation
• Labels: ClassFormatError
• Assignee: Eric Milles
• Reporter: Eric Milles
• Created: 13/Apr/23 15:32
• Updated: 23/Aug/23 09:07
• Resolved: 13/Apr/23 16:25

Description

Consider the following:

@groovy.transform.CompileStatic
class FileTreeBuilder {
    def methodMissing(String name, Object args) {
        if (args instanceof Object[] && args.length == 1) {
            def arg = args[0]
            if (arg instanceof Closure) {
                dir(name, arg)
            } else if (arg instanceof CharSequence) {
                file(name, arg.toString())
            } else if (arg instanceof byte[]) {
                file(name, arg)
            } else if (arg instanceof File) {
                file(name, arg)
            }
        }
    }
}

STC gives no errors for this, but there are 2 class format issues. "args.length" is reporting bad type on operand stack and "if (arg instanceof CharSequence)" and subsequent guards are reporting improper class name "Ljava/lang/Object;" on the operand stack.

Issue Links

• is related to: GROOVY-5683 Accessing length of an array of arrays occurs VerifyError