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https://issues.apache.org/jira/browse/MSHADE-228?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15329500#comment-15329500
]
Harvey Raja commented on MSHADE-228:
------------------------------------
You will be able to see the difference in the constant pool in the ClassFile
generated by javac and the ClassFile generated by shade.
You can also run against java 9 to see the runtime error:
{code}
Exception in thread "main" java.lang.BootstrapMethodError:
java.lang.IncompatibleClassChangeError: Inconsistent constant data for
com/screwed/constantpool/InvalidMethodRefExample.lambda$autoDetect$0()Ljava/lang/String;
at index 26
at
com.screwed.constantpool.InvalidMethodRefExample.autoDetect(InvalidMethodRefExample.java:10)
at Test.main(Test.java:5)
Caused by: java.lang.IncompatibleClassChangeError: Inconsistent constant data
for
com/screwed/constantpool/InvalidMethodRefExample.lambda$autoDetect$0()Ljava/lang/String;
at index 26
... 2 more
{code}
> Shade can incorrectly re-write an InterfaceMethodRef in the constant pool to
> a MethodRef
> ----------------------------------------------------------------------------------------
>
> Key: MSHADE-228
> URL: https://issues.apache.org/jira/browse/MSHADE-228
> Project: Maven Shade Plugin
> Issue Type: Bug
> Affects Versions: 2.4.3
> Reporter: Harvey Raja
>
> Given an interface such as:
> {code}
> public interface InvalidMethodRefExample
> {
> String getLocation();
> static InvalidMethodRefExample autoDetect()
> {
> return () -> "$Default$";
> }
> }
> {code}
> {{javac}} correctly produces a bootstrap method that has a {{MethodHandle}}
> for its second argument to {{LambdaMetafactory.metafactory}}, and the
> {{MethodHandle}} is to an {{InterfaceMethodref}}.
> After running shade the {{InterfaceMethodref}} becomes a {{Methodref}}.
> This seems to have been the result for some time now but with Java 9 it
> appears that the java team have decided to enforce this CP type and will be a
> real problem when using shade and Java 9.
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