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https://issues.apache.org/jira/browse/GROOVY-10725?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Eric Milles resolved GROOVY-10725.
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Resolution: Fixed
https://github.com/apache/groovy/commit/a79940a416878a318dc82442a61f40f1e8de4114
> Regression in STC related to generics, unknown cause
> ----------------------------------------------------
>
> Key: GROOVY-10725
> URL: https://issues.apache.org/jira/browse/GROOVY-10725
> Project: Groovy
> Issue Type: Bug
> Components: Static Type Checker
> Affects Versions: 3.0.12
> Environment: Linux, Groovy 3.0.12, Java 8
> Reporter: Octavia Togami
> Assignee: Eric Milles
> Priority: Major
>
> In 3.0.12 the following code fails to pass STC:
> {code:groovy}
> @groovy.transform.CompileStatic
> class Request {
> Enumeration<String> getHeaderNames() {
> def r = new Vector()
> r.add("Header")
> r.elements()
> }
> String getHeader(String header) {
> "value"
> }
> }
> @groovy.transform.CompileStatic
> class Test {
> void test() {
> def request = new Request()
> Set<Map<String, String>> allHeaders = []
> allHeaders.addAll(request.getHeaderNames().toList().collectEntries {
> headerName -> [headerName, request.getHeader(headerName)] })
> }
> }
> new Test().test()
> {code}
> Error:
> {code:groovy}
> $ groovy fail.groovy
> org.codehaus.groovy.control.MultipleCompilationErrorsException: startup
> failed:
> /home/octy/Documents/groovy_playground/fail.groovy: 18: [Static type
> checking] - Cannot call <T> java.util.Set <Map>#addAll(T[]) with arguments
> [java.lang.Object]
> @ line 18, column 7.
> allHeaders.addAll(request.getHeaderNames().toList().collectEntries {
> headerName -> [headerName, request.getHeader(headerName)] })
> ^
> 1 error
> {code}
> This is not a total blocker, as the generics can be specified to
> `collectEntries`, or the expression extracted to a typed variable; and the
> error will go away. However, it does make existing code fail to compile, when
> it worked under 3.0.11.
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