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https://issues.apache.org/jira/browse/GROOVY-11383?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eric Milles updated GROOVY-11383:
---------------------------------
Language: groovy
> incorrect comparison is missed by the compiler
> ----------------------------------------------
>
> Key: GROOVY-11383
> URL: https://issues.apache.org/jira/browse/GROOVY-11383
> Project: Groovy
> Issue Type: Bug
> Components: Static Type Checker
> Reporter: Thodoris Sotiropoulos
> Priority: Minor
>
> I have the following program
> {code:java}
> class Test {
> public static void main(String[] args) {
> int x = 1;
> x > new Object();
> }
> } {code}
> h3. Actual behavior
> The code compilers but I receive the following runtime exception
> {code:java}
> Exception in thread "main" java.lang.IllegalArgumentException: Cannot
> compare java.lang.Integer with value '1' and java.lang.Object with value
> 'java.lang.Object@609cd4d8'
> at
> org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.compareToWithEqualityCheck(DefaultTypeTransformation.java:816)
> at
> org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.compareTo(DefaultTypeTransformation.java:751)
> at
> org.codehaus.groovy.runtime.ScriptBytecodeAdapter.compareTo(ScriptBytecodeAdapter.java:802)
> at
> org.codehaus.groovy.runtime.ScriptBytecodeAdapter.compareGreaterThan(ScriptBytecodeAdapter.java:888)
> at Test.main(test.groovy:5)
> Caused by: java.lang.ClassCastException: class java.lang.Object cannot be
> cast to class java.lang.Integer (java.lang.Object and java.lang.Integer are
> in module java.base of loader 'bootstrap')
> at java.base/java.lang.Integer.compareTo(Integer.java:59)
> at
> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.base/java.lang.reflect.Method.invoke(Method.java:566)
> at
> org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:338)
> at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:274)
> at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1225)
> at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1005)
> at
> org.codehaus.groovy.runtime.InvokerHelper.invokePojoMethod(InvokerHelper.java:623)
> at
> org.codehaus.groovy.runtime.InvokerHelper.invokeMethod(InvokerHelper.java:614)
> at
> org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.compareToWithEqualityCheck(DefaultTypeTransformation.java:802)
> ... 4 more
> {code}
> h3. Expected behavior
> The code should have been rejected with
> {code:java}
> test.groovy: 5: [Static type checking] - Cannot find matching method
> int#compareTo(java.lang.Object). Please check if the declared type is correct
> and if the method exists.
> @ line 5, column 5.
> x > new Object();
> ^1 error
> {code}
> h3. Notes
> * Tested against master (commit: ea4b1efad7dcb805b4f4fa6454fc95fa338147cb)
> * Groovy 4.0.10 rejects the program as expected.
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