Aspects that apply to files cannot apply to source files.

Make them not crash.

RELNOTES: None.
PiperOrigin-RevId: 164265379

3 files changed, 11 insertions, 3 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/packages/AspectDefinition.java b/src/main/java/com/google/devtools/build/lib/packages/AspectDefinition.java
index 4b8750da07..7fcd60f4f7 100644
--- a/src/main/java/com/google/devtools/build/lib/packages/AspectDefinition.java
+++ b/src/main/java/com/google/devtools/build/lib/packages/AspectDefinition.java
@@ -159,9 +159,10 @@ public final class AspectDefinition {
   }
 
   /**
-   * Returns whether this aspect applies to files.
+   * Returns whether this aspect applies to (output) files.
    *
-   * Currently only supported for top-level aspects and targets.
+   * Currently only supported for top-level aspects and targets, and
+   * only for output files.
    */
   public boolean applyToFiles() {
     return applyToFiles;
@@ -459,7 +460,8 @@ public final class AspectDefinition {
      * Sets whether this aspect should apply to files.
      *
      * Default is <code>false</code>.
-     * Currently only supported for top-level aspects and targets.
+     * Currently only supported for top-level aspects and targets, and only for
+     * output files.
      */
     public Builder applyToFiles(boolean propagateOverGeneratedFiles) {
       this.applyToFiles = propagateOverGeneratedFiles;
diff --git a/src/main/java/com/google/devtools/build/lib/packages/Target.java b/src/main/java/com/google/devtools/build/lib/packages/Target.java
index f503aa8568..ad83dafeed 100644
--- a/src/main/java/com/google/devtools/build/lib/packages/Target.java
+++ b/src/main/java/com/google/devtools/build/lib/packages/Target.java
@@ -21,6 +21,7 @@ import com.google.devtools.build.lib.skylarkinterface.SkylarkCallable;
 import com.google.devtools.build.lib.skylarkinterface.SkylarkModule;
 
 import java.util.Set;
+import javax.annotation.Nullable;
 
 /**
  *  A node in the build dependency graph, identified by a Label.
@@ -60,6 +61,7 @@ public interface Target {
    * If this is a Rule, returns itself; it this is an OutputFile, returns its
    * generating rule; if this is an input file, returns null.
    */
+  @Nullable
   Rule getAssociatedRule();
 
   /**
diff --git a/src/main/java/com/google/devtools/build/lib/skyframe/ConfiguredTargetFunction.java b/src/main/java/com/google/devtools/build/lib/skyframe/ConfiguredTargetFunction.java
index 1b783b9926..d650fdbc13 100644
--- a/src/main/java/com/google/devtools/build/lib/skyframe/ConfiguredTargetFunction.java
+++ b/src/main/java/com/google/devtools/build/lib/skyframe/ConfiguredTargetFunction.java
@@ -985,6 +985,10 @@ public final class ConfiguredTargetFunction implements SkyFunction {
     if (!aspect.getDefinition().applyToFiles() && !(dep.getTarget() instanceof Rule)) {
       return false;
     }
+    if (dep.getTarget().getAssociatedRule() == null) {
+      // even aspects that 'apply to files' cannot apply to input files.
+      return false;
+    }
     return dep.satisfies(aspect.getDefinition().getRequiredProviders());
   }