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https://issues.apache.org/jira/browse/FREEMARKER-133?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17042215#comment-17042215
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Dániel Dékány commented on FREEMARKER-133:
------------------------------------------
Strange. The visibility of the concrete classes involved shouldn't mater,
because {{get(key)}} was declared in the public {{Multimap}} interface. Also,
{{BeansWrapper}} has already decided that it's OK to call that method, as the
stack trace shows, and then the reflection API decides that it's not allowed.
But the method is shown to be "public". So, I don't get it. Can you navigate
into reflection API code visible in the stack trace, on the exact Java version
where it fails, to see why it decides as it does?
> BeansWrapper IllegalAccessException when class defining accessed method is
> package-private, but subclass is public
> ------------------------------------------------------------------------------------------------------------------
>
> Key: FREEMARKER-133
> URL: https://issues.apache.org/jira/browse/FREEMARKER-133
> Project: Apache Freemarker
> Issue Type: Bug
> Reporter: Lauri Keel
> Priority: Major
>
> Consider the following code:
> {code:java}
> <#list orders.get(type) as order></#list>{code}
> where orders is com.google.common.collect.ArrayListMultimap. An
> IllegalAccessException is thrown, because
> com.google.common.collect.AbstractListMultimap where the get method is
> defined is package-private.
> {code:java}
> ----
> FTL stack trace ("~" means nesting-related):
> - Failed at: #list orders.get(type) as order [in template
> "admin-orders.ftl" at line 4, column 9]
> ----
> at
> freemarker.ext.beans._MethodUtil.newInvocationTemplateModelException(_MethodUtil.java:289)
> at
> freemarker.ext.beans._MethodUtil.newInvocationTemplateModelException(_MethodUtil.java:252)
> at
> freemarker.ext.beans.SimpleMethodModel.exec(SimpleMethodModel.java:77)
> at freemarker.core.MethodCall._eval(MethodCall.java:65)
> at freemarker.core.Expression.eval(Expression.java:83)
> at
> freemarker.core.IteratorBlock.acceptWithResult(IteratorBlock.java:98)
> at freemarker.core.IteratorBlock.accept(IteratorBlock.java:93)
> at freemarker.core.Environment.visit(Environment.java:366)
> at
> freemarker.core.IteratorBlock$IterationContext.executedNestedContentForCollOrSeqListing(IteratorBlock.java:291)
> at
> freemarker.core.IteratorBlock$IterationContext.executeNestedContent(IteratorBlock.java:271)
> at
> freemarker.core.IteratorBlock$IterationContext.accept(IteratorBlock.java:242)
> at
> freemarker.core.Environment.visitIteratorBlock(Environment.java:642)
> at
> freemarker.core.IteratorBlock.acceptWithResult(IteratorBlock.java:107)
> at freemarker.core.IteratorBlock.accept(IteratorBlock.java:93)
> at freemarker.core.Environment.visit(Environment.java:330)
> at freemarker.core.Environment.visit(Environment.java:336)
> at freemarker.core.Environment.process(Environment.java:309)
> at freemarker.template.Template.process(Template.java:384)
> at puu.page.PageHandler.getRendered(PageHandler.java:550)
> ... 36 common frames omitted
> Caused by: java.lang.IllegalAccessException: class
> freemarker.ext.beans.BeansWrapper cannot access a member of class
> com.google.common.collect.AbstractListMultimap with modifiers "public
> volatile"
> at
> java.base/jdk.internal.reflect.Reflection.newIllegalAccessException(Reflection.java:361)
> at
> java.base/java.lang.reflect.AccessibleObject.checkAccess(AccessibleObject.java:591)
> at java.base/java.lang.reflect.Method.invoke(Method.java:558)
> at
> freemarker.ext.beans.BeansWrapper.invokeMethod(BeansWrapper.java:1505)
> at
> freemarker.ext.beans.SimpleMethodModel.exec(SimpleMethodModel.java:72)
> ... 52 common frames omitted
> {code}
> Tested in 2.3.29, 2.3.28, 2.3.23. Strangely it occasionally randomly does
> work.
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