[GROOVY-8055] @CompileStatic improperly orders parameter types

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.4.7, 2.4.8
• Fix Version/s: 2.6.0-alpha-4, 3.0.0-alpha-3, 2.5.0-rc-3
• Component/s: Static compilation
• Assignee: Daniel Sun
• Reporter: Marcin Grzejszczak
• Created: 17/Jan/17 12:15
• Updated: 26/Jul/18 04:38
• Resolved: 11/May/18 15:47

Description

Given the following snippet

import groovy.transform.CompileStatic

@CompileStatic
class Foo {
void isEqualTo(Number number) { println "Number" }
void isEqualTo(Object number) { println "Object" }
}

@CompileStatic
class Runner {
void run() {
new Foo().isEqualTo(4)
}
}

new Runner().run()

When you try to run it
Then you get the following exception

[Static type checking] - Reference to method is ambiguous. Cannot choose between [void Foo#isEqualTo(java.lang.Object), void Foo#isEqualTo(java.lang.Number)]
 at line: 13, column: 1

And you would expect the thing to compile properly