Excerpt from http://mail.openjdk.java.net/pipermail/valhalla-dev/2018-July/004616.html

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> - don't you need also to override visitApply in case the constructor
> is calling an instance method on the value being constructed?

This will be covered as part of JDK-8205910

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The required visitApply override was overlooked in the fix for JDK-8205910
and this must be fixed - otherwise the generated code may fail to verify when there are instance method invocations in the constructor (after all instance field are definitely assigned)