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https://issues.apache.org/jira/browse/GROOVY-9482?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Paul King closed GROOVY-9482.
-----------------------------
Resolution: Duplicate
Thanks for spotting that. We are aware of the issue (see GROOVY-9438) and
already have a fix in place. We plan on releasing a new version with the fix in
possibly about a week's time.
> Problem with empty case in switches when not in last position
> -------------------------------------------------------------
>
> Key: GROOVY-9482
> URL: https://issues.apache.org/jira/browse/GROOVY-9482
> Project: Groovy
> Issue Type: Bug
> Components: syntax
> Affects Versions: 2.5.10
> Environment: openjdk version "1.8.0_242" (zulu)
> Reporter: Sylvain Dusart
> Priority: Minor
> Attachments: testcase.tgz
>
>
> There seems to be a problem with empty cases for switch with groovy 2.5.10
> except when they are in the last position.
> {code}
> String s = ''
> switch (s) {
> case 'a':
> println s
> break
> // will generate a compilation error with groovy 2.5.10
> case 'empty':
> break
> case 'b':
> println s
> break
> }
> {code}
> The exception is :
> {code:java}
> org.codehaus.groovy.control.MultipleCompilationErrorsException: startup
> failed:org.codehaus.groovy.control.MultipleCompilationErrorsException:
> startup failed:General error during class generation:
> org.codehaus.groovy.ast.stmt.ReturnStatement cannot be cast to
> org.codehaus.groovy.ast.stmt.BlockStatement
> java.lang.ClassCastException: org.codehaus.groovy.ast.stmt.ReturnStatement
> cannot be cast to org.codehaus.groovy.ast.stmt.BlockStatement at
> org.codehaus.groovy.classgen.FinalVariableAnalyzer.fallsThrough(FinalVariableAnalyzer.java:480)
> at
> org.codehaus.groovy.classgen.FinalVariableAnalyzer.visitSwitch(FinalVariableAnalyzer.java:344)
> at
> org.codehaus.groovy.ast.stmt.SwitchStatement.visit(SwitchStatement.java:53)
> at
> org.codehaus.groovy.ast.CodeVisitorSupport.visitBlockStatement(CodeVisitorSupport.java:86)
> at
> org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitBlockStatement(ClassCodeVisitorSupport.java:106)
> at
> org.codehaus.groovy.classgen.FinalVariableAnalyzer.visitBlockStatement(FinalVariableAnalyzer.java:147)
> at org.codehaus.groovy.ast.stmt.BlockStatement.visit(BlockStatement.java:69)
> at
> org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitClassCodeContainer(ClassCodeVisitorSupport.java:110)
> at
> org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitConstructorOrMethod(ClassCodeVisitorSupport.java:121)
> at
> org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitMethod(ClassCodeVisitorSupport.java:132)
> at org.codehaus.groovy.ast.ClassNode.visitContents(ClassNode.java:1103) at
> org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitClass(ClassCodeVisitorSupport.java:54)
> at
> org.codehaus.groovy.classgen.Verifier.checkFinalVariables(Verifier.java:263)
> at org.codehaus.groovy.classgen.Verifier.visitClass(Verifier.java:258) at
> org.codehaus.groovy.control.CompilationUnit$18.call(CompilationUnit.java:811)
> at
> org.codehaus.groovy.control.CompilationUnit.applyToPrimaryClassNodes(CompilationUnit.java:1084)
> at
> org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:640)
> at
> org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(CompilationUnit.java:618)
> at
> org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:595)
> at groovy.lang.GroovyClassLoader.doParseClass(GroovyClassLoader.java:401) at
> groovy.lang.GroovyClassLoader.access$300(GroovyClassLoader.java:89) at
> groovy.lang.GroovyClassLoader$5.provide(GroovyClassLoader.java:341) at
> groovy.lang.GroovyClassLoader$5.provide(GroovyClassLoader.java:338) at
> org.codehaus.groovy.runtime.memoize.ConcurrentCommonCache.getAndPut(ConcurrentCommonCache.java:147)
> at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:336) at
> groovy.lang.GroovyShell.parseClass(GroovyShell.java:546) at
> groovy.lang.GroovyShell.run(GroovyShell.java:375) at
> groovy.lang.GroovyShell.run(GroovyShell.java:365) at
> groovy.ui.GroovyMain.processOnce(GroovyMain.java:592) at
> groovy.ui.GroovyMain.run(GroovyMain.java:336) at
> groovy.ui.GroovyMain.access$1400(GroovyMain.java:69) at
> groovy.ui.GroovyMain$GroovyCommand.process(GroovyMain.java:295) at
> groovy.ui.GroovyMain.processArgs(GroovyMain.java:134) at
> groovy.ui.GroovyMain.main(GroovyMain.java:116) at
> sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498) at
> org.codehaus.groovy.tools.GroovyStarter.rootLoader(GroovyStarter.java:110) at
> org.codehaus.groovy.tools.GroovyStarter.main(GroovyStarter.java:128)
> 1 error {code}
> It works with groovy 2.5.9 and 3.0.2.
> In attachment, you'll find a small test case to reproduce the problem.
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