Christopher Smith created GROOVY-11365:
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Summary: IllegalAccessError when using protected method as
reference
Key: GROOVY-11365
URL: https://issues.apache.org/jira/browse/GROOVY-11365
Project: Groovy
Issue Type: Bug
Components: Compiler
Affects Versions: 4.0.21, 4.0.18
Reporter: Christopher Smith
I will try to repro this, but posting in case the description is sufficient to
identify the problem:
I have an abstract base class {{AbstractServiceImpl<E extends Entity>}} that
defines {{protected final E upsert(E entity)}}. From a subclass inside a
closure, I try to use {{this::upsert}} as a {{Consumer<DocumentRequest>}}.
Starting somewhere between 4.0.14 and 4.0.18 (other bugs prevent me from
bisecting further), an {{IllegalAccessError}} gets introduced at runtime:
{code}
java.lang.IllegalAccessError: class
com.example.doc.DocumentRequestServiceImpl$_openUpload_closure2 tried to access
protected method 'com.example.base.Entity
com.example.base.AbstractServiceImpl.upsert(com.example.base.Entity)'
(com.example.doc.DocumentRequestServiceImpl$_openUpload_closure2 and
com.example.base.AbstractServiceImpl are in unnamed module of loader 'app')
{code}
I've examined the bytecode for both the call site and the method
implementation, and I can't see a difference in the code generated between
4.0.14 and 4.0.18/21. I'm not certain why it works in 4.0.14, but with javac I
would expect to see a lambda bridge to allow the lambda to access the
containing-class-visible-but-only-by-inheritance protected method.
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