Thodoris Sotiropoulos created GROOVY-11475:
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Summary: loops and flow typing can still lead to ClassCastException
Key: GROOVY-11475
URL: https://issues.apache.org/jira/browse/GROOVY-11475
Project: Groovy
Issue Type: Bug
Components: Static Type Checker
Reporter: Thodoris Sotiropoulos
Related to GROOVY-11474
The following program can still lead to CCE at runtime
{code:java}
class A{}
class Main {
public static void main(String[] args) {
def x = new A();
while (true) {
final A y = x;
x = 1
}
}
}
{code}
h3. Actual behavior
CCE at runtime
{code:java}
Exception in thread "main"
org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast
object '1' with class 'java.lang.Integer' to class 'A'
at
org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.continueCastOnSAM(DefaultTypeTransformation.java:416)
at
org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.continueCastOnNumber(DefaultTypeTransformation.java:329)
at
org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.castToType(DefaultTypeTransformation.java:248)
at
org.codehaus.groovy.vmplugin.v8.IndyInterface.fromCache(IndyInterface.java:336)
at Main.main(Main.groovy:7) {code}
h3. Expected behavior
The code should have been rejected.
h3. Notes
Tested against commit: 29f5a1eb0c174514a56e94892d07f417adbad45f
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