} catch (IOException e) {
                    if (!remoteFile.exists()) {
                        download.setException(new ArtifactNotFoundException(download.getArtifact(), repository));
                    } else {
                        download.setException(new ArtifactTransferException(download.getArtifact(), repository, e));
                    }
                }
            }
        }

     * immediately fails with the same exception:
     *
     * Thread1: calls setException(), which returns true, context switch before it can CAS
     * seenExceptions to its exception
     *
     * Thread2: calls setException(), which returns false, CASes seenExceptions to its exception,
     * and wrongly believes that its exception is new (leading it to logging it when it shouldn't)

         */
        CombinedFuture.this.setException(((ExecutionException) error).getCause());
      } else if (error instanceof CancellationException) {
        cancel(false);
      } else {
        CombinedFuture.this.setException(error);
      }
    }

    abstract void setValue(@ParametricNullness T value);
  }

  @WeakOuter

       * class with a manual reference back to the "containing" class.)
       *
       * This has the nice-ish side effect of limiting reentrancy: run() calls
       * timeoutFuture.setException() calls run(). That reentrancy would already be harmless, since
       * timeoutFuture can be set (and delegate cancelled) only once. (And "set only once" is

  }

  static final class ImmediateFailedFuture<V extends @Nullable Object> extends TrustedFuture<V> {
    ImmediateFailedFuture(Throwable thrown) {
      setException(thrown);
    }
  }

  static final class ImmediateCancelledFuture<V extends @Nullable Object> extends TrustedFuture<V> {
    @CheckForNull
    static final ImmediateCancelledFuture<Object> INSTANCE =

    T fallbackResult;
    try {
      fallbackResult = doFallback(localFallback, castThrowable);
    } catch (Throwable t) {
      restoreInterruptIfIsInterruptedException(t);
      setException(t);
      return;
    } finally {
      exceptionType = null;
      fallback = null;
    }

    setResult(fallbackResult);
  }

  @Override
  @CheckForNull

        return Optional.ofNullable(delegate.getMojoExecution()).map(me -> new DefaultMojoExecution(session, me));
    }

    @Override
    public Optional<Exception> getException() {
        return Optional.ofNullable(delegate.getException());
    }

        }

        @Override
        public String getLocation() {
            return problem.getLocation();
        }

        @Override
        public Exception getException() {
            return problem.getException();
        }

        @Override
        public String getMessage() {
            return problem.getMessage();
        }

        @Override

                            return buffer.toString();
                        }

                        @Override
                        public Exception getException() {
                            return problem.getException();
                        }

                        @Override
                        public String getMessage() {
                            return problem.getMessage();

    @Override
    public CacheRecord get(Key key) throws LifecycleExecutionException {
        CacheRecord cacheRecord = cache.get(key);
        if (cacheRecord != null && cacheRecord.getException() != null) {
            throw cacheRecord.getException();
        }
        return cacheRecord;
    }

    @Override
    public CacheRecord put(Key key, Set<Artifact> projectArtifacts) {