Update from Google.

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MOE_MIGRATED_REVID=85702957

1 files changed, 41 insertions, 0 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/analysis/ErrorConfiguredTarget.java b/src/main/java/com/google/devtools/build/lib/analysis/ErrorConfiguredTarget.java
new file mode 100644
index 0000000000..aa07a7de02
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/analysis/ErrorConfiguredTarget.java
@@ -0,0 +1,41 @@
+// Copyright 2014 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.devtools.build.lib.analysis;
+
+import com.google.common.collect.UnmodifiableIterator;
+import com.google.devtools.build.lib.analysis.config.BuildConfiguration;
+import com.google.devtools.build.lib.packages.Target;
+
+/**
+ * A configured target that is used instead of a real configured target if there
+ * are cyclic dependencies or if any of the prerequisites has errors. This
+ * avoids accessing state that shouldn't be accessed.
+ */
+final class ErrorConfiguredTarget extends AbstractConfiguredTarget {
+  ErrorConfiguredTarget(Target target, BuildConfiguration configuration) {
+    super(target, configuration);
+  }
+
+  @Override
+  public Object get(String providerKey) {
+    throw new UnsupportedOperationException();
+  }
+
+  @Override
+  public UnmodifiableIterator<TransitiveInfoProvider> iterator() {
+    throw new IllegalStateException();
+  }
+}
+