diagnose error

tests/test.sh

@@ -16,6 +16,7 @@ set -x  # facilitates debugging by printing out executed commands
 user_dir=$PWD
 script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"
 cd $script_dir
+ls -l *
 
 ascii_alignment_pileup.R \
   --verbose \