Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-8062977

Inference: NullPointerException during bound incorporation

    XMLWordPrintable

    Details

    • Subcomponent:
    • Resolved In Build:
      b39
    • Verification:
      Verified

      Backports

        Description

        Here's the repro:

        ===
        import java.util.List;

        class Test {
          interface TypeToken<B> {}
          interface TypeMap<B> {
            <T extends B> T getInstance(TypeToken<T> type);
          }

          void m(TypeMap<Iterable<?>[]> map, TypeToken<List<Integer>[]> type) {
            List<Integer>[] result = map.getInstance(type);
          }
        }
        ===

        $ javac Test.java
        ...
        java.lang.NullPointerException
        at com.sun.tools.javac.comp.Infer$IncorporationStep$7.apply(Infer.java:874)
        at com.sun.tools.javac.comp.Infer.checkWithinBounds(Infer.java:596)
        at com.sun.tools.javac.comp.Infer$GraphSolver.solve(Infer.java:1681)
        at com.sun.tools.javac.comp.Infer$InferenceContext.solve(Infer.java:2315)
        at com.sun.tools.javac.comp.Infer$InferenceContext.solve(Infer.java:2307)
        at com.sun.tools.javac.comp.Infer$InferenceContext.solve(Infer.java:2322)
        at com.sun.tools.javac.comp.Infer.instantiateMethod(Infer.java:201)
        at com.sun.tools.javac.comp.Resolve.rawInstantiate(Resolve.java:568)
        at com.sun.tools.javac.comp.Resolve.checkMethod(Resolve.java:606)
        ...

          Attachments

            Issue Links

              Activity

                People

                Assignee:
                mcimadamore Maurizio Cimadamore
                Reporter:
                mcimadamore Maurizio Cimadamore
                Votes:
                0 Vote for this issue
                Watchers:
                3 Start watching this issue

                  Dates

                  Created:
                  Updated:
                  Resolved: