commit 110cba00a2bbdaa8fcbc08d4eac8b09c4394fb39
author cushon <cushon@google.com> Tue Feb 19 12:43:11 2019 -0800
committer Copybara-Service <copybara-worker@google.com> Tue Feb 19 12:45:04 2019 -0800
tree ab8b70f836dafe66027358591c635e1c3ebbf7ef
parent 0e0f4a3bbcd38dd342f357d4462d3737b5d389bd

Improve assertion failure message

PiperOrigin-RevId: 234654290

src/main/java/com/google/devtools/build/lib/analysis/Runfiles.java

diff --git a/src/main/java/com/google/devtools/build/lib/analysis/Runfiles.java b/src/main/java/com/google/devtools/build/lib/analysis/Runfiles.java
index 50a325f..2fd9ef9 100644
--- a/src/main/java/com/google/devtools/build/lib/analysis/Runfiles.java
+++ b/src/main/java/com/google/devtools/build/lib/analysis/Runfiles.java
@@ -828,7 +828,8 @@
      */
     public Builder addArtifact(Artifact artifact) {
       Preconditions.checkNotNull(artifact);
-      Preconditions.checkArgument(!artifact.isMiddlemanArtifact());
+      Preconditions.checkArgument(
+          !artifact.isMiddlemanArtifact(), "unexpected middleman artifact: %s", artifact);
       artifactsBuilder.add(artifact);
       return this;
     }