[GROOVY-10938] Cannot assign list to array under static compilation

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Duplicate
• Affects Version/s: 3.0.15
• Component/s: Compiler
• Assignee: Unassigned
• Reporter: Jason Garrett
• Created: 15/Feb/23 14:30
• Updated: 09/Sep/24 13:19
• Resolved: 15/Feb/23 14:38

Description

Assigning a List to an Array of the same type does not compile.

This class:

package example

import groovy.transform.CompileStatic

@CompileStatic
class AssignListToArray {
   void doStuff(String[] data) {
      data = data.collect { it }
   }
} 

Results in this compilation error:

src/main/groovy/example/AssignListToArray.groovy: 8: [Static type checking] - Cannot assign value of type java.util.List <java.lang.String> to variable of type java.lang.String[]
 @ line 8, column 10.
           data = data.collect { it } 

This class compiles in 2.4.21, 2.5.21, and 3.0.14.

Issue Links

• is related to: GROOVY-7506 Cannot assign value of type java.util.List<java.lang.String> to variable of type java.lang.String[]
• is related to: GROOVY-8983 Cannot assign Collection to Array
• is related to: GROOVY-8984 Can assign Collection with super wildcard to Array