diff --git a/src/c/character.d b/src/c/character.d
index ede7bbab2..a69b6e4bf 100644
--- a/src/c/character.d
+++ b/src/c/character.d
@@ -293,6 +293,7 @@ ecl_char_equal(cl_object x, cl_object y)
     c = ecl_va_arg(cs);
     for (j=1;  j<i;  j++)
       if (ecl_char_equal(c, ecl_va_arg(ds))) {
+        ecl_va_end(ds);
         @(return ECL_NIL);
       }
   }
diff --git a/src/c/error.d b/src/c/error.d
index b11671a3c..851f69ded 100644
--- a/src/c/error.d
+++ b/src/c/error.d
@@ -142,12 +142,15 @@ cl_object
 CEerror(cl_object c, const char *err, int narg, ...)
 {
   ecl_va_list args;
+  cl_object rest;
   ecl_va_start(args, narg, narg, 0);
   ecl_enable_interrupts();
+  rest = cl_grab_rest_args(args);
+  ecl_va_end(args);
   return funcall(4, @'si::universal-error-handler',
                  c,                       /*  correctable  */
                  ecl_make_constant_base_string(err,-1),  /*  continue-format-string  */
-                 cl_grab_rest_args(args));
+                 rest);
 }
 
 /***********************
@@ -184,12 +187,15 @@ void
 FEcontrol_error(const char *s, int narg, ...)
 {
   ecl_va_list args;
+  cl_object rest;
   ecl_va_start(args, narg, narg, 0);
+  rest = cl_grab_rest_args(args);
+  ecl_va_end(args);
   si_signal_simple_error(4,
                          @'control-error', /* condition name */
                          ECL_NIL, /* not correctable */
                          ecl_make_constant_base_string(s,-1), /* format control */
-                         cl_grab_rest_args(args)); /* format args */
+                         rest); /* format args */
   _ecl_unexpected_return();
 }
 
@@ -201,6 +207,7 @@ FEreader_error(const char *s, cl_object stream, int narg, ...)
   ecl_va_list args;
   ecl_va_start(args, narg, narg, 0);
   args_list = cl_grab_rest_args(args);
+  ecl_va_end(args);
   if (Null(stream)) {
     /* Parser error */
     si_signal_simple_error(4,
@@ -504,6 +511,7 @@ FElibc_error(const char *msg, int narg, ...)
 
   ecl_va_start(args, narg, narg, 0);
   rest = cl_grab_rest_args(args);
+  ecl_va_end(args);
 
   FEerror("~?~%C library explanation: ~A.", 3,
           ecl_make_constant_base_string(msg,-1), rest,
@@ -530,6 +538,7 @@ FEwin32_error(const char *msg, int narg, ...)
 
   ecl_va_start(args, narg, narg, 0);
   rest = cl_grab_rest_args(args);
+  ecl_va_end(args);
   FEerror("~?~%Windows library explanation: ~A.", 3,
           ecl_make_constant_base_string(msg,-1), rest,
           win_msg_obj);
@@ -551,15 +560,15 @@ FEwin32_error(const char *msg, int narg, ...)
 @(defun cerror (cformat eformat &rest args)
 @ {
   ecl_enable_interrupts();
-  return funcall(4, @'si::universal-error-handler', cformat, eformat,
-                 cl_grab_rest_args(args));
+  @(return funcall(4, @'si::universal-error-handler', cformat, eformat,
+                   cl_grab_rest_args(args)));
 } @)
 
 @(defun si::serror (cformat eformat &rest args)
 @ {
   ecl_enable_interrupts();
-  return funcall(4, @'si::stack-error-handler', cformat, eformat,
-                 cl_grab_rest_args(args));
+  @(return funcall(4, @'si::stack-error-handler', cformat, eformat,
+                   cl_grab_rest_args(args)));
 } @)
 
 void
diff --git a/src/c/file.d b/src/c/file.d
index e16a8cdae..518f2f4dd 100755
--- a/src/c/file.d
+++ b/src/c/file.d
@@ -5672,6 +5672,7 @@ file_libc_error(cl_object error_type, cl_object stream,
 
   ecl_va_start(args, narg, narg, 0);
   rest = cl_grab_rest_args(args);
+  ecl_va_end(args);
 
   si_signal_simple_error(4, (cl_object)(cl_symbols + ecl_fixnum(error_type)), Cnil,
                          ecl_make_constant_base_string("~?~%C library explanation: ~A.",-1),
diff --git a/src/c/numbers/number_equalp.d b/src/c/numbers/number_equalp.d
index 9fe153502..678f509e3 100644
--- a/src/c/numbers/number_equalp.d
+++ b/src/c/numbers/number_equalp.d
@@ -219,6 +219,7 @@ ecl_number_equalp(cl_object x, cl_object y)
     numi = ecl_va_arg(nums);
     for (j = 1; j<i; j++)
       if (ecl_number_equalp(numi, ecl_va_arg(numb))) {
+        ecl_va_end(numb);
         @(return ECL_NIL);
       }
     ecl_va_end(numb);
diff --git a/src/c/package.d b/src/c/package.d
index 7b95331d7..379b6d1ec 100644
--- a/src/c/package.d
+++ b/src/c/package.d
@@ -38,12 +38,15 @@ static void
 FEpackage_error(const char *message, cl_object package, int narg, ...)
 {
   ecl_va_list args;
+  cl_object rest;
   ecl_va_start(args, narg, narg, 0);
+  rest = narg? cl_grab_rest_args(args) : cl_list(1,package);
+  ecl_va_end(args);
   si_signal_simple_error(6,
                          @'package-error',
                          ECL_NIL, /* not correctable */
                          ecl_make_constant_base_string(message,-1), /* format control */
-                         narg? cl_grab_rest_args(args) : cl_list(1,package), /* format args */
+                         rest, /* format args */
                          @':package', package); /* extra arguments */
 }
 
diff --git a/src/c/threads/process.d b/src/c/threads/process.d
index 673ce89e9..f33c343ef 100755
--- a/src/c/threads/process.d
+++ b/src/c/threads/process.d
@@ -450,9 +450,9 @@ cl_object
 mp_process_preset(cl_narg narg, cl_object process, cl_object function, ...)
 {
   ecl_va_list args;
-  ecl_va_start(args, function, narg, 2);
   if (narg < 2)
     FEwrong_num_arguments(@[mp::process-preset]);
+  ecl_va_start(args, function, narg, 2);
   assert_type_process(process);
   process->process.function = function;
   process->process.args = cl_grab_rest_args(args);
@@ -679,7 +679,6 @@ mp_process_run_function(cl_narg narg, cl_object name, cl_object function, ...)
   cl_object process;
   cl_object rest;
   ecl_va_list args;
-  ecl_va_start(args, function, narg, 2);
   if (narg < 2)
     FEwrong_num_arguments(@[mp::process-run-function]);
   if (CONSP(name)) {
@@ -687,6 +686,7 @@ mp_process_run_function(cl_narg narg, cl_object name, cl_object function, ...)
   } else {
     process = mp_make_process(2, @':name', name);
   }
+  ecl_va_start(args, function, narg, 2);
   rest = cl_grab_rest_args(args);
   ecl_va_end(args);
   cl_apply(4, @'mp::process-preset', process, function,