1 files changed, 16 insertions, 1 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/packages/BuildType.java b/src/main/java/com/google/devtools/build/lib/packages/BuildType.java
index 5df9d83625..6a32c68d57 100644
--- a/src/main/java/com/google/devtools/build/lib/packages/BuildType.java
+++ b/src/main/java/com/google/devtools/build/lib/packages/BuildType.java
@@ -23,6 +23,7 @@ import com.google.devtools.build.lib.cmdline.Label;
 import com.google.devtools.build.lib.cmdline.LabelSyntaxException;
 import com.google.devtools.build.lib.packages.License.DistributionType;
 import com.google.devtools.build.lib.packages.License.LicenseParsingException;
+import com.google.devtools.build.lib.syntax.EvalException;
 import com.google.devtools.build.lib.syntax.Printer;
 import com.google.devtools.build.lib.syntax.Runtime;
 import com.google.devtools.build.lib.syntax.SelectorValue;
@@ -30,7 +31,6 @@ import com.google.devtools.build.lib.syntax.Type;
 import com.google.devtools.build.lib.syntax.Type.ConversionException;
 import com.google.devtools.build.lib.syntax.Type.DictType;
 import com.google.devtools.build.lib.syntax.Type.LabelClass;
-import com.google.devtools.build.lib.syntax.Type.LabelVisitor;
 import com.google.devtools.build.lib.syntax.Type.ListType;
 import java.util.ArrayList;
 import java.util.Collections;
@@ -520,6 +520,21 @@ public final class BuildType {
       }
       return keys.build();
     }
+
+    @Override
+    public String toString() {
+      // Convert to a lib.syntax.SelectorList to guarantee consistency with callers that serialize
+      // directly on that type.
+      List<SelectorValue> selectorValueList = new ArrayList<>();
+      for (Selector<T> element : elements) {
+        selectorValueList.add(new SelectorValue(element.getEntries(), element.getNoMatchError()));
+      }
+      try {
+        return com.google.devtools.build.lib.syntax.SelectorList.of(selectorValueList).toString();
+      } catch (EvalException e) {
+        throw new IllegalStateException("this list should have been validated on creation");
+      }
+    }
   }
 
   /**