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  1. JDK
  2. JDK-8264696

Multi-catch clause causes compiler exception because it uses the package-private supertype

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: P4
    • Resolution: Fixed
    • Affects Version/s: 8-pool, 11, 14, 15, 16, 17
    • Fix Version/s: 17
    • Component/s: tools
    • Subcomponent:
    • Resolved In Build:
      b18
    • CPU:
      x86_64
    • OS:
      windows_10
    • Verification:
      Verified

      Description

      ADDITIONAL SYSTEM INFORMATION :
      javac full version "16+36-2231"

      A DESCRIPTION OF THE PROBLEM :
      The usage of a multi-catch clause may cause a compiler exception, whereas the equivalent code with separate catch clauses doesn't. Given 2 public exception classes which extend a package-private exception class in pkg2, when I have a multi-catch clause for both public exception classes in pkg1 and attempt to access a method such as `getMessage` inside it, then the compiler uses their package-private parent and gives a compiler error saying `getMessage` is in an inaccessible class.

      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      * create the 4 following files with the code as below:
      src\pkg1\Test.java
      src\pkg2\Child1Exception.java
      src\pkg2\Child2Exception.java
      src\pkg2\ParentException.java
      * compile the files:
      javac -d out --source-path src src\pkg1\Test.java src\pkg2\Child1Exception.java src\pkg2\Child2Exception.java src\pkg2\ParentException.java

      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      Compilation succeeds
      ACTUAL -
      src\pkg1\Test.java:22: error: Throwable.getMessage() is defined in an inaccessible class or interface
                  e.getMessage();
                   ^
      1 error

      ---------- BEGIN SOURCE ----------
      package pkg1;

      import pkg2.Child1Exception;
      import pkg2.Child2Exception;

      class Test {

          void success() {
              try {
                  foo();
              } catch (Child1Exception e) {
                  e.getMessage();
              } catch (Child2Exception e) {
                  e.getMessage();
              }
          }

          void fail() {
              try {
                  foo();
              } catch (Child1Exception | Child2Exception e) {
                  e.getMessage();
              }
          }

          void foo() throws Child1Exception, Child2Exception {
          }
      }
      ====================================
      package pkg2;

      public class Child1Exception extends ParentException {
      }
      ====================================
      package pkg2;

      public class Child2Exception extends ParentException {
      }
      ====================================
      package pkg2;

      class ParentException extends Exception {
      }
      ---------- END SOURCE ----------

      CUSTOMER SUBMITTED WORKAROUND :
      Increase the accessibility of the parent class or use uni-catch clauses

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