[GROOVY-10010] STC: method call with GString elements in list/array has different error from assignment

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 4.0.0-alpha-3, 3.0.9, 2.5.16
• Assignee: Eric Milles
• Reporter: Eric Milles
• Created: 05/Apr/21 16:43
• Updated: 01/Mar/22 20:05
• Resolved: 07/Apr/21 13:30

Description

Follow up from GROOVY-5559 and GROOVY-9971. Consider the following:

void m(List<String> list) { }
@groovy.transform.TypeChecked
void test() {
  def bar = 123
  m(["foo","$bar"])
  List<String> strings = ["foo","$bar"]
}

The assignment yields a nice error message as per 5559: "You are trying to use a GString in place of a String in a type which explicitly declares accepting String. Make sure to call toString() on all GString values."

The direct use of a list expression as a call argument still retains the less-informative generics compatibility error: "Cannot call Script#m(java.util.List <java.lang.String>) with arguments [java.util.ArrayList <java.io.Serializable>]".