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Shil Sinha commented on GROOVY-7753: ------------------------------------ Changed the title to reflect that this issue is about the ternary operator and not the elvis. > regression of return type from ternary operator > ----------------------------------------------- > > Key: GROOVY-7753 > URL: https://issues.apache.org/jira/browse/GROOVY-7753 > Project: Groovy > Issue Type: Bug > Components: Static compilation, Static Type Checker > Affects Versions: 2.4.6 > Reporter: Jason Winnebeck > > In Groovy 2.4.5 the following code works, but in Groovy 2.4.6, it fails to > compile: > {code} > @groovy.transform.Field > String x = "X" > @groovy.transform.CompileStatic > public List<String> getStrings() { > x ? [x] : Collections.emptyList() > } > getStrings() > {code} > In Groovy 2.4.6 the compile error is: > {code} > [Static type checking] - Incompatible generic argument types. Cannot assign > java.util.List <? extends java.lang.Object> to: java.util.List <String> > @ line 6, column 2. > x ? [x] : Collections.emptyList() > ^ > {code} > Workaround is to cast the result of emptyList to the erased type, (List) in > this case. -- This message was sent by Atlassian JIRA (v6.3.4#6332)