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  1. JDK
  2. JDK-8246293

Compiler fails on valid record compact constructor

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      Description

      ADDITIONAL SYSTEM INFORMATION :
      $ uname -a
      Linux polaris 5.6.14-arch1-1 #1 SMP PREEMPT Wed, 20 May 2020 20:43:19 +0000 x86_64 GNU/Linux
      $ java -version
      java -version
      openjdk version "14.0.1" 2020-04-14
      OpenJDK Runtime Environment AdoptOpenJDK (build 14.0.1+7)
      OpenJDK 64-Bit Server VM AdoptOpenJDK (build 14.0.1+7, mixed mode, sharing)


      A DESCRIPTION OF THE PROBLEM :
      When inside a record compact constructor, a method that receives a Supplier is called, the compiler fails with the error "compact constructor must not have return statements", but there's not return statement inside the constructor.

      Example:

      import java.util.function.Supplier;

      public record Bug(int value) {

      static void bug(Supplier<String> str) {
      System.out.println(str.get());
      }

      public Bug {
      bug(() -> "hello");
      }

      public static void main(String[] args) {
      new Bug(1);
      }
      }

      Compiler output:
      Bug.java:9: error: invalid compact constructor in record Bug(int)
      public Bug {
      ^
        (compact constructor must not have return statements)
      Note: Bug.java uses preview language features.
      Note: Recompile with -Xlint:preview for details.
      1 error

      Also the error can be reproduced using java 15.ea.25.


      FREQUENCY : always


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            • Assignee:
              vromero Vicente Arturo Romero Zaldivar
              Reporter:
              webbuggrp Webbug Group
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              • Created:
                Updated:
                Resolved: