diff --git a/meos/src/general/type_out.c b/meos/src/general/type_out.c
index ab816eb811..6d3f269545 100644
--- a/meos/src/general/type_out.c
+++ b/meos/src/general/type_out.c
@@ -763,9 +763,12 @@ temporal_as_mfjson(const Temporal *temp, bool with_bbox, int flags,
   if (flags == 0)
     return result;
 
+  /* Convert to JSON and back to a C string to apply flags using json-c */
   struct json_object *jobj = json_tokener_parse(result);
   pfree(result);
-  return (char *) json_object_to_json_string_ext(jobj, flags);
+  result = strdup(json_object_to_json_string_ext(jobj, flags));
+  json_object_put(jobj);
+  return result;
 }
 
 /*****************************************************************************
diff --git a/meos/src/general/type_parser.c b/meos/src/general/type_parser.c
index 9ffed39b94..9c5c1d4c9d 100644
--- a/meos/src/general/type_parser.c
+++ b/meos/src/general/type_parser.c
@@ -596,9 +596,8 @@ span_parse(const char **str, meosType spantype, bool end, Span *span)
   if (end && ! ensure_end_input(str, "span"))
     return false;
 
-  if (! span)
-    return true;
-  span_set(lower, upper, lower_inc, upper_inc, basetype, spantype, span);
+  if (span)
+    span_set(lower, upper, lower_inc, upper_inc, basetype, spantype, span);
   return true;
 }
 
@@ -663,13 +662,16 @@ tinstant_parse(const char **str, meosType temptype, bool end,
   if (! temporal_basetype_parse(str, basetype, &elem))
     return false;
   TimestampTz t = timestamp_parse(str);
-  if (t == DT_NOEND)
-    return false;
-  /* Ensure there is no more input */
-  if (end && ! ensure_end_input(str, "temporal"))
+  if (t == DT_NOEND ||
+    /* Ensure there is no more input */
+    (end && ! ensure_end_input(str, "temporal")))
+  {
+    DATUM_FREE(elem, basetype);
     return false;
+  }
   if (result)
-    *result = tinstant_make_free(elem, temptype, t);
+    *result = tinstant_make(elem, temptype, t);
+  DATUM_FREE(elem, basetype);
   return true;
 }
 
@@ -774,8 +776,9 @@ tcontseq_parse(const char **str, meosType temptype, interpType interp,
   p_cbracket(str);
   p_cparen(str);
   if (result)
-    *result = tsequence_make_free(instants, count, lower_inc, upper_inc,
-      interp, NORMALIZE);
+    *result = tsequence_make((const TInstant **) instants, count,
+      lower_inc, upper_inc, interp, NORMALIZE);
+  pfree_array((void **) instants, count);
   return true;
 }
 
diff --git a/meos/src/point/tpoint_parser.c b/meos/src/point/tpoint_parser.c
index f55cd8b9b9..e9f2f5a7e2 100644
--- a/meos/src/point/tpoint_parser.c
+++ b/meos/src/point/tpoint_parser.c
@@ -38,6 +38,7 @@
 #include <meos.h>
 #include <meos_internal.h>
 #include "general/type_parser.h"
+#include "general/type_util.h"
 #include "point/tpoint_spatialfuncs.h"
 
 /*****************************************************************************/
@@ -286,15 +287,16 @@ tpointinst_parse(const char **str, meosType temptype, bool end,
     return false;
   }
   TimestampTz t = timestamp_parse(str);
-  if (t == DT_NOEND)
-    return false;
-  if (end && ! ensure_end_input(str, "temporal point"))
+  if (t == DT_NOEND ||
+    /* Ensure there is no more input */
+    (end && ! ensure_end_input(str, "temporal point")))
   {
     pfree(gs);
     return false;
   }
   if (result)
-    *result = tinstant_make_free(PointerGetDatum(gs), temptype, t);
+    *result = tinstant_make(PointerGetDatum(gs), temptype, t);
+  pfree(gs);
   return true;
 }
 
@@ -399,8 +401,9 @@ tpointseq_cont_parse(const char **str, meosType temptype, interpType interp,
   p_cbracket(str);
   p_cparen(str);
   if (result)
-    *result = tsequence_make_free(instants, count, lower_inc, upper_inc,
-      interp, NORMALIZE);
+    *result = tsequence_make((const TInstant **) instants, count,
+      lower_inc, upper_inc, interp, NORMALIZE);
+  pfree_array((void **) instants, count);
   return true;
 }