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https://issues.apache.org/jira/browse/GROOVY-10367?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eric Milles updated GROOVY-10367:
---------------------------------
Fix Version/s: 2.5.19
> STC fails to infer the correct type for type variable in the presence of the
> diamond operator and bounded polymorphism
> ----------------------------------------------------------------------------------------------------------------------
>
> Key: GROOVY-10367
> URL: https://issues.apache.org/jira/browse/GROOVY-10367
> Project: Groovy
> Issue Type: Bug
> Components: Static Type Checker
> Reporter: Thodoris Sotiropoulos
> Assignee: Eric Milles
> Priority: Major
> Fix For: 4.0.2, 2.5.19, 3.0.13
>
>
> This issue may be related to GROOVY-10343.
> I have the following program
> {code:java}
> class A<Z, P extends Z> {
> Z f;
> A(Z f) {}
> }
> class B<Z extends Number> {
> Z f;
> void test() {
> f = new A<>((Z) null).f;
> }
> }
> {code}
> h3. Actual behaviour
> {code}
> org.codehaus.groovy.control.MultipleCompilationErrorsException: startup
> failed:
> test.groovy: 10: [Static type checking] - Cannot assign value of type
> java.lang.Object to variable of type Z
> @ line 10, column 9.
> f = new A<>((Z) null).f;
> ^
> 1 error
> {code}
> h3. Expected behaviour
> Compile successfully
> NOTE: Replacing `Z extends Number` with `Z` leads to a successful compilation.
> Tested against master
> (https://github.com/apache/groovy/commit/cf2f77fb033a10d36c4db3a7ff07a2b04631afcf)
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