1 files changed, 3 insertions, 2 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/rules/python/PyLibrary.java b/src/main/java/com/google/devtools/build/lib/rules/python/PyLibrary.java
index ef1d40f9c3..8d20b9657b 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/python/PyLibrary.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/python/PyLibrary.java
@@ -23,13 +23,11 @@ import com.google.devtools.build.lib.analysis.RunfilesProvider;
 import com.google.devtools.build.lib.collect.nestedset.NestedSet;
 import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder;
 import com.google.devtools.build.lib.collect.nestedset.Order;
-import com.google.devtools.build.lib.packages.RuleClass.ConfiguredTargetFactory.RuleErrorException;
 import com.google.devtools.build.lib.rules.RuleConfiguredTargetFactory;
 import com.google.devtools.build.lib.rules.cpp.CcLinkParams;
 import com.google.devtools.build.lib.rules.cpp.CcLinkParamsProvider;
 import com.google.devtools.build.lib.rules.cpp.CcLinkParamsStore;
 import com.google.devtools.build.lib.vfs.PathFragment;
-
 import java.util.ArrayList;
 import java.util.List;
 
@@ -55,6 +53,9 @@ public abstract class PyLibrary implements RuleConfiguredTargetFactory {
     List<Artifact> srcs = common.validateSrcs();
     List<Artifact> allOutputs =
         new ArrayList<>(semantics.precompiledPythonFiles(ruleContext, srcs, common));
+    if (ruleContext.hasErrors()) {
+      return null;
+    }
 
     NestedSet<Artifact> filesToBuild =
         NestedSetBuilder.wrap(Order.STABLE_ORDER, allOutputs);