[GROOVY-10087] STC does not perform boxing on chars when encountering assignment and function call

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 4.0.0-beta-1, 3.0.9
• Component/s: Static Type Checker
• Assignee: Eric Milles
• Reporter: Thodoris Sotiropoulos
• Created: 13/May/21 13:01
• Updated: 03/Feb/22 22:34
• Resolved: 16/May/21 00:19

Description

This is related to GROOVY-10079.

I have the following program

public class Main {
    public static void main(String[] args) {
      Character c = foo();
    }

    public static char foo() {
      'd' as char
    }
}

Expected Behaviour

Compile successfully

Actual Behaviour

org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
test.groovy: 3: [Static type checking] - Cannot assign value of type char to variable of type java.lang.Character
 @ line 3, column 21.
         Character c = foo();
                       ^1 error

Tested against master (https://github.com/apache/groovy/commit/2df019d3c93486e8a32d407d364913e7b65e1cba).