diff --git a/femtolisp/cvalues.c b/femtolisp/cvalues.c
index 31fa269..a2f5a4d 100644
--- a/femtolisp/cvalues.c
+++ b/femtolisp/cvalues.c
@@ -38,16 +38,17 @@ value_t cvalue_typeof(value_t *args, u_int32_t nargs);
 // trigger unconditional GC after this many bytes are allocated
 #define ALLOC_LIMIT_TRIGGER 67108864
 
+static size_t malloc_pressure = 0;
+
 static cvalue_t **Finalizers = NULL;
 static size_t nfinalizers=0;
 static size_t maxfinalizers=0;
-static size_t malloc_pressure = 0;
 
 void add_finalizer(cvalue_t *cv)
 {
     if (nfinalizers == maxfinalizers) {
         size_t nn = (maxfinalizers==0 ? 256 : maxfinalizers*2);
-        cvalue_t **temp = (cvalue_t**)LLT_REALLOC(Finalizers, nn*sizeof(value_t));
+        cvalue_t **temp = (cvalue_t**)realloc(Finalizers, nn*sizeof(value_t));
         if (temp == NULL)
             lerror(MemoryError, "out of memory");
         Finalizers = temp;
diff --git a/femtolisp/flisp.boot b/femtolisp/flisp.boot
index 58d43b7..444ff5a 100644
--- a/femtolisp/flisp.boot
+++ b/femtolisp/flisp.boot
@@ -338,7 +338,8 @@
 	  #fn("9000r1e0c1_|43;" [foldl #.cons] reverse) reverse! #fn("7000r1c0q_41;" [#fn("9000r1]~F6C02~N~|~m02P2o005\x1c/2|;" [])] reverse!)
 	  self-evaluating? #fn("8000r1|?16602|C@17K02e0|3116A02|C16:02|e1|31<;" [constant?
   top-level-value] self-evaluating?)
-	  separate #fn("7000r2c0q]41;" [#fn(":000r1c0qm02|~\x7f__44;" [#fn(";000r4}\x85;0e0g2g342;|}M316@0~|}N}Mg2Kg344;~|}Ng2}Mg3K44;" [values] separate-)])] separate)
+	  separate #fn("7000r2c0q]41;" [#fn(":000r1c0qm02|~\x7f__44;" [#fn(";000r4}\x85C0e0e1g231e1g33142;|}M316@0~|}N}Mg2Kg344;~|}Ng2}Mg3K44;" [values
+  reverse] separate-)])] separate)
 	  set-syntax! #fn("9000r2e0e1|}43;" [put! *syntax-environment*] set-syntax!)
 	  simple-sort #fn("7000r1|A17602|NA640|;c0q|M41;" [#fn("8000r1e0c1qc2q42;" [call-with-values
   #fn("8000r0e0c1qi10N42;" [separate #fn("7000r1|~X;" [])])
diff --git a/femtolisp/flisp.c b/femtolisp/flisp.c
index e0a3f51..a477daf 100644
--- a/femtolisp/flisp.c
+++ b/femtolisp/flisp.c
@@ -289,13 +289,6 @@ value_t symbol(char *str)
     return tagptr(*pnode, TAG_SYM);
 }
 
-typedef struct {
-    value_t isconst;
-    value_t binding;   // global value binding
-    fltype_t *type;
-    uint32_t id;
-} gensym_t;
-
 static uint32_t _gensym_ctr=0;
 // two static buffers for gensym printing so there can be two
 // gensym names available at a time, mostly for compare()
@@ -313,6 +306,11 @@ value_t fl_gensym(value_t *args, uint32_t nargs)
     return tagptr(gs, TAG_SYM);
 }
 
+int fl_isgensym(value_t v)
+{
+    return isgensym(v);
+}
+
 static value_t fl_gensymp(value_t *args, u_int32_t nargs)
 {
     argcount("gensym?", nargs, 1);
@@ -557,12 +555,12 @@ void gc(int mustgrow)
         value_t ent;
         for(i=0; i < rs->backrefs.size; i++) {
             ent = (value_t)rs->backrefs.table[i];
-            if (ent != HT_NOTFOUND)
+            if (ent != (value_t)HT_NOTFOUND)
                 rs->backrefs.table[i] = (void*)relocate(ent);
         }
         for(i=0; i < rs->gensyms.size; i++) {
             ent = (value_t)rs->gensyms.table[i];
-            if (ent != HT_NOTFOUND)
+            if (ent != (value_t)HT_NOTFOUND)
                 rs->gensyms.table[i] = (void*)relocate(ent);
         }
         rs->source = relocate(rs->source);
diff --git a/femtolisp/flisp.h b/femtolisp/flisp.h
index 9303f52..7cb7492 100644
--- a/femtolisp/flisp.h
+++ b/femtolisp/flisp.h
@@ -29,6 +29,13 @@ typedef struct _symbol_t {
     };
 } symbol_t;
 
+typedef struct {
+    value_t isconst;
+    value_t binding;   // global value binding
+    struct _fltype_t *type;
+    uint32_t id;
+} gensym_t;
+
 #define TAG_NUM      0x0
 #define TAG_CPRIM    0x1
 #define TAG_FUNCTION 0x2
@@ -323,6 +330,7 @@ value_t string_from_cstr(char *str);
 value_t string_from_cstrn(char *str, size_t n);
 int fl_isstring(value_t v);
 int fl_isnumber(value_t v);
+int fl_isgensym(value_t v);
 int fl_isiostream(value_t v);
 value_t cvalue_compare(value_t a, value_t b);
 int numeric_compare(value_t a, value_t b, int eq, int eqnans, char *fname);
diff --git a/femtolisp/system.lsp b/femtolisp/system.lsp
index 1e8c9df..ad69de5 100644
--- a/femtolisp/system.lsp
+++ b/femtolisp/system.lsp
@@ -265,7 +265,7 @@
 
 (define (separate pred lst)
   (define (separate- pred lst yes no)
-    (cond ((null? lst) (values yes no))
+    (cond ((null? lst) (values (reverse yes) (reverse no)))
 	  ((pred (car lst))
 	   (separate- pred (cdr lst) (cons (car lst) yes) no))
 	  (else