the vertex index should be "first + i".
diff --git a/opengl/java/android/opengl/GLLogWrapper.java b/opengl/java/android/opengl/GLLogWrapper.java
index 4119bf8..f332448 100644
--- a/opengl/java/android/opengl/GLLogWrapper.java
+++ b/opengl/java/android/opengl/GLLogWrapper.java
@@ -1517,7 +1517,7 @@
         arg("count", count);
         startLogIndices();
         for (int i = 0; i < count; i++) {
-            doElement(mStringBuilder, i, first + count);
+            doElement(mStringBuilder, i, first + i);
         }
         endLogIndices();
         end();