diff --git a/byterun/include/stack.h b/byterun/include/stack.h
index 68c4943c8..8cdf3fd3f 100644
--- a/byterun/include/stack.h
+++ b/byterun/include/stack.h
@@ -235,6 +235,10 @@ static inline void s_exit_f() {
 #endif
   s_popn(f_args_sz(&frame));
 
+  if (frame.closure) {
+    s_pop();
+  }
+
   // save returned value, not in main
   if (frame.prev_fp != 0) {
     s_push(frame.ret);
diff --git a/byterun/regression_check.sh b/byterun/regression_check.sh
index 31ac79a44..d08df3e5f 100755
--- a/byterun/regression_check.sh
+++ b/byterun/regression_check.sh
@@ -15,9 +15,14 @@ for test in ../regression/*.lama; do
   $compiler -b  $test > /dev/null
   test_file="${test%.*}"
   echo $test_file
-  cat $test_file.input | ./byterun.exe -p test*.bc > /dev/null
-  cat $test_file.input | ./byterun.exe -vi test*.bc > /dev/null
+  # cat $test_file.input | ./byterun.exe -p test*.bc > test.bc.code
+  # cat $test_file.input | ./byterun.exe -p test*.bc
+  cat $test_file.input | ./byterun.exe -vi test*.bc > test.log
+  sed '1d;s/^..//' $test_file.t > test_orig.log
+  diff test.log test_orig.log
+
   rm test*.bc
+  rm test.log test_orig.log
   echo "done"
 done
 
diff --git a/byterun/src/interpreter.c b/byterun/src/interpreter.c
index d10236309..28770bbd6 100644
--- a/byterun/src/interpreter.c
+++ b/byterun/src/interpreter.c
@@ -486,10 +486,10 @@ void run_main(Bytefile* bf, int argc, char **argv) {
         s_push_i(Bsexp_tag_patt(s_pop()));
         break;
       case CMD_PATT_REF_TAG: // #ref
-        s_push_i(Bunboxed_patt(s_pop()));
+        s_push_i(Bboxed_patt(s_pop()));
         break;
       case CMD_PATT_VAL_TAG: // #val
-        s_push_i(Bboxed_patt(s_pop()));
+        s_push_i(Bunboxed_patt(s_pop()));
         break;
       case CMD_PATT_FUN_TAG: // #fun
         s_push_i(Bclosure_tag_patt(s_pop()));
diff --git a/byterun/src/module_manager.cpp b/byterun/src/module_manager.cpp
index c6c56c4f2..571c1d0e7 100644
--- a/byterun/src/module_manager.cpp
+++ b/byterun/src/module_manager.cpp
@@ -473,6 +473,7 @@ void run_stdlib_func(BUILTIN id, size_t args_count) {
     s_push(ret);
     break;
   case BUILTIN_Lread:
+    printf(" ");
     ret = (void *)Lread();
     s_push(ret);
     break;