diff --git a/infrastructure/src/main/java/scala/bench/ScalacBenchmarkRunner.java b/infrastructure/src/main/java/scala/bench/ScalacBenchmarkRunner.java
index 3ea15b9..58ab090 100644
--- a/infrastructure/src/main/java/scala/bench/ScalacBenchmarkRunner.java
+++ b/infrastructure/src/main/java/scala/bench/ScalacBenchmarkRunner.java
@@ -21,27 +21,31 @@ private static String corpusVersion(String source) throws IOException {
             throw new RuntimeException("Please provide -DscalaRef=...");
 
         // TODO: git fetch --tags
+        try {
 
-        switch(source) {
-            case "vector":
-                if (GitWalker.isAncestor("v2.11.0", scalaRef, repo))
-                    return "fb04376"; // compiles with 2.11.0, but not with 2.10.6
-                break;
+            switch (source) {
+                case "vector":
+                    if (GitWalker.isAncestor("v2.11.0", scalaRef, repo))
+                        return "fb04376"; // compiles with 2.11.0, but not with 2.10.6
+                    break;
 
-            case "scalap":
-                if (GitWalker.isAncestor("v2.10.1", scalaRef, repo))
-                    return "a8c43dc"; // compiles with 2.10.1, but not with 2.9.3
-                break;
+                case "scalap":
+                    if (GitWalker.isAncestor("v2.10.1", scalaRef, repo))
+                        return "a8c43dc"; // compiles with 2.10.1, but not with 2.9.3
+                    break;
 
-            case "better-files":
-                if (GitWalker.isAncestor("v2.10.2", scalaRef, repo))
-                    return "a45f905"; // compiles with 2.10.2, but not with 2.10.1
-                break;
+                case "better-files":
+                    if (GitWalker.isAncestor("v2.10.2", scalaRef, repo))
+                        return "a45f905"; // compiles with 2.10.2, but not with 2.10.1
+                    break;
 
-            case "scala":
-                if (GitWalker.isAncestor("v2.11.5", scalaRef, repo))
-                    return "21d12e9";
-                break;
+                case "scala":
+                    if (GitWalker.isAncestor("v2.11.5", scalaRef, repo))
+                        return "21d12e9";
+                    break;
+            }
+        } catch (IllegalArgumentException iae){
+            // ignore, we might be on a dotty commit, just pick latest
         }
 
         return null;