Careful debugging of the memory leak problem. At this stage,

stack frames for interpreted (but not primitive) functions appear not to be being
reclaimed, and the oblist doesn't seem to be being fully reclaimed.

src/memory/vectorspace.c

@@ -13,6 +13,8 @@
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
+
+
 /*
  * wide characters
  */
@@ -22,6 +24,7 @@
 #include "memory/conspage.h"
 #include "memory/consspaceobject.h"
 #include "debug.h"
+#include "io/io.h"
 #include "memory/hashmap.h"
 #include "memory/stack.h"
 #include "memory/vectorspace.h"
@@ -123,7 +126,8 @@ struct cons_pointer make_vso( uint32_t tag, uint64_t payload_size ) {
 void free_vso( struct cons_pointer pointer ) {
     struct cons_space_object cell = pointer2cell( pointer );
 
-    debug_printf( DEBUG_ALLOC, L"About to free vector-space object at 0x%lx\n",
+    debug_printf( DEBUG_ALLOC, L"About to free vector-space object of type %s at 0x%lx\n",
+                  (char *) cell.payload.vectorp.tag.bytes,
                   cell.payload.vectorp.address );
     struct vector_space_object *vso = cell.payload.vectorp.address;