[GROOVY-9986] CLONE - STC does not report type mismatches for coerced list expression

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Component/s: Static Type Checker
• Assignee: Paul King
• Reporter: Thodoris Sotiropoulos
• Created: 17/Mar/21 06:54
• Updated: 15/Apr/23 18:07

Description

The following program compiles (with @CompileStatic), although it shouldn't.

public class Main {
    public static void main(String[] args) {
      // Integer[] arr = new Integer[]{1, "str"}; // does not report error (see GROOVY-9985)
      Integer[] arr2 = [1, "fda"] as Integer[] // does not report error
    }
}

As a result, an exception is thrown at runtime

Exception in thread "main" org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast object 'str' with class 'java.lang.String' to class 'java.lang.Integer'
        at org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.castToNumber(DefaultTypeTransformation.java:172)
        at org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.continueCastOnNumber(DefaultTypeTransformation.java:282)
        at org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.castToType(DefaultTypeTransformation.java:243)
        at org.codehaus.groovy.vmplugin.v8.IndyInterface.fromCache(IndyInterface.java:318)
        at Main.main(test.groovy:4)

Tested on https://github.com/apache/groovy/commit/f0eea862549529ef4e93fafe337f86dd4ac98751

 

Issue Links

• is a clone of: GROOVY-9985 STC does not report type mismatches in array initializers