Add debugging for too-big install_base

PiperOrigin-RevId: 333082485
diff --git a/src/test/shell/integration/minimal_jdk_test.sh b/src/test/shell/integration/minimal_jdk_test.sh
index af2473c..ba0c03d 100755
--- a/src/test/shell/integration/minimal_jdk_test.sh
+++ b/src/test/shell/integration/minimal_jdk_test.sh
@@ -50,6 +50,8 @@
   size=$(du -s "$ib" | cut -d\	 -f1)
   maxsize=$((1024*280))
   if [ $size -gt $maxsize ]; then
+    echo "$ib was too big:" 1>&2
+    du -a "$ib" 1>&2
     fail "Size of install_base is $size kB, expected it to be less than $maxsize kB."
   fi
 }