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https://issues.apache.org/jira/browse/GROOVY-12621?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18135676#comment-18135676
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ASF GitHub Bot commented on GROOVY-12621:
-----------------------------------------
testlens-app[bot] commented on PR #3147:
URL: https://github.com/apache/groovy/pull/3147#issuecomment-6540424633
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> STC still accepts some private superclass field accesses under @TypeChecked
> that fail at run time
> -------------------------------------------------------------------------------------------------
>
> Key: GROOVY-12621
> URL: https://issues.apache.org/jira/browse/GROOVY-12621
> Project: Groovy
> Issue Type: Bug
> Affects Versions: 4.0.33, 5.0.8, 6.0.0
> Reporter: Scott Murphy Heiberg
> Priority: Major
>
> GROOVY-12610 makes the type checker reject property access to a private
> instance field of a superclass when dynamic dispatch can never find it. Three
> shapes are still accepted and fail with a MissingPropertyException.
> Enum constant body (z, this.z and super.z all fail):
> {code:groovy}
> @groovy.transform.TypeChecked
> enum E {
> A { def n() { z } }
> private String z = 'x'
> }
> E.A.n()
> {code}
> Write through super in a non-static inner subclass (compound assignment and
> increment also fail):
> {code:groovy}
> @groovy.transform.TypeChecked
> class Base {
> private String z = 'x'
> class Sub extends Base {
> def m() { super.z = 'y' }
> }
> def t() { new Sub().m() }
> }
> new Base().t()
> {code}
> Receiver that is not an instance of the calling inner class:
> {code:groovy}
> @groovy.transform.TypeChecked
> class Base {
> private String z = 'x'
> static class Sub extends Base {}
> class Inner {
> def m(Sub sub) { sub.z }
> }
> def t() { new Inner().m(new Sub()) }
> }
> new Base().t()
> {code}
> Actual: all three compile and then fail with MissingPropertyException: No
> such property: z for class: E$1 (or Base$Sub).
> Expected: compile errors "No such property: z for class: ...", as for the
> shapes GROOVY-12610 covers. Under @CompileStatic all three keep compiling,
> since static compilation accesses the field directly.
> Cause: ClassNodeUtils.hasNoEnclosingInstance returned false for an enum
> constant body, which is created in the enum's static initializer. The type
> checker also did not take two run-time limits into account: there is no
> enclosing-instance fallback for a write through super (GROOVY-11823), and the
> fallback applies only when the receiver is an instance of the calling class.
> The enum case is seen in 4.0.33, 5.0.8 and 6.0.0.
> PR: https://github.com/apache/groovy/pull/3147
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