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https://issues.apache.org/jira/browse/GROOVY-9984?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Eric Milles updated GROOVY-9984:
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Fix Version/s: 3.0.9
> Wrong type inference when passing null
> --------------------------------------
>
> Key: GROOVY-9984
> URL: https://issues.apache.org/jira/browse/GROOVY-9984
> Project: Groovy
> Issue Type: Bug
> Components: Static compilation, Static Type Checker
> Reporter: Stefanos Chaliasos
> Assignee: Eric Milles
> Priority: Major
> Fix For: 4.0.0-alpha-3, 3.0.9
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> I have the following Groovy program.
> {code:groovy}
> @groovy.transform.CompileStatic
> public class Main {
> public static void main(String[] args) {
> final A<Integer> x = new A<>(null);
> baz(x);
> }
> public static void baz(A<Integer> x) {}
> }
> class A<T> {
> T f;
> public A(T f) {
> this.f = f;
> }
> }
> {code}
> h2. Actual Behavior
> The program does not compile, and I get the following error.
> {code:java}
> org.codehaus.groovy.control.MultipleCompilationErrorsException: startup
> failed:
> Test.groovy: 4: [Static type checking] - Incompatible generic argument types.
> Cannot assign A <java.lang.Object> to: A <Integer>
> @ line 4, column 26.
> final A<Integer> x = new A<>(null);
> ^
> Test.groovy: 5: [Static type checking] - Cannot call Main#baz(A
> <java.lang.Integer>) with arguments [A <java.lang.Object>]
> @ line 5, column 5.
> baz(x);
> ^
> 2 errors
> {code}
> h2. Expected Behavior
> Compile successfully.
> h2. Comment
> This should be a regression bug because it compiles with the 4.0.0-alpha-2
> compiler.
> h2. Affected Version
> This programs fails when compiled with the compiler from the master (commit:
> f0eea862549529ef4e93fafe337f86dd4ac98751).
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