Thodoris Sotiropoulos created GROOVY-11439:
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Summary: closure is assignable to java.io.InputStream
Key: GROOVY-11439
URL: https://issues.apache.org/jira/browse/GROOVY-11439
Project: Groovy
Issue Type: Bug
Components: Static Type Checker
Reporter: Thodoris Sotiropoulos
I am not sure if this is an expected behavior or not, but a lambda expression
is assignable to java.io.InputStream
{code:java}
class Test {
public static void main(String[] args) {
java.io.InputStream x = (int p, int p2) -> p;
System.out.println(x.read());
}
} {code}
h3. Actual behavior
The code compiles, but I get the following exception at runtime
{code:java}
Exception in thread "main" groovy.lang.MissingMethodException: No signature of
method: Test$_main_closure1.doCall() is applicable for argument types: ()
values: []
Possible solutions: doCall(int, int), isCase(java.lang.Object),
isCase(java.lang.Object), findAll(), findAll(), findAll(groovy.lang.Closure)
at
org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:259)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1006)
at groovy.lang.Closure.call(Closure.java:452)
at InputStream1_groovyProxy.read(Unknown Source)
at Test.main(test.groovy:4) {code}
h3. Expected behavior
The code should have been rejected.
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