diff --git a/src/common/container.c b/src/common/container.c
index 8645cb4826..a6e3c11f35 100644
--- a/src/common/container.c
+++ b/src/common/container.c
@@ -42,7 +42,7 @@ smartlist_new,(void))
  * list's elements.
  */
 MOCK_IMPL(void,
-smartlist_free,(smartlist_t *sl))
+smartlist_free_,(smartlist_t *sl))
 {
   if (!sl)
     return;
@@ -1335,7 +1335,7 @@ digest256map_assign_key(digest256map_entry_t *ent, const uint8_t *key)
    * those entries.  If free_val is provided, invoked it every value in \
    * <b>map</b>. */                                                     \
   MOCK_IMPL(void,                                                       \
-  prefix##_free, (maptype *map, void (*free_val)(void*)))               \
+  prefix##_free_, (maptype *map, void (*free_val)(void*)))              \
   {                                                                     \
     prefix##_entry_t **ent, **next, *this;                              \
     if (!map)                                                           \
@@ -1525,7 +1525,7 @@ digestset_new(int max_elements)
 
 /** Free all storage held in <b>set</b>. */
 void
-digestset_free(digestset_t *set)
+digestset_free_(digestset_t *set)
 {
   if (!set)
     return;
diff --git a/src/common/container.h b/src/common/container.h
index f6affd3bc6..95dfa4c90f 100644
--- a/src/common/container.h
+++ b/src/common/container.h
@@ -28,7 +28,9 @@ typedef struct smartlist_t {
 } smartlist_t;
 
 MOCK_DECL(smartlist_t *, smartlist_new, (void));
-MOCK_DECL(void, smartlist_free, (smartlist_t *sl));
+MOCK_DECL(void, smartlist_free_, (smartlist_t *sl));
+#define smartlist_free(sl) FREE_AND_NULL(smartlist, (sl))
+
 void smartlist_clear(smartlist_t *sl);
 void smartlist_add(smartlist_t *sl, void *element);
 void smartlist_add_all(smartlist_t *sl, const smartlist_t *s2);
@@ -350,7 +352,7 @@ char *smartlist_join_strings2(smartlist_t *sl, const char *join,
   void* prefix##set(maptype *map, keytype key, void *val);              \
   void* prefix##get(const maptype *map, keytype key);                   \
   void* prefix##remove(maptype *map, keytype key);                      \
-  MOCK_DECL(void, prefix##free, (maptype *map, void (*free_val)(void*))); \
+  MOCK_DECL(void, prefix##free_, (maptype *map, void (*free_val)(void*))); \
   int prefix##isempty(const maptype *map);                              \
   int prefix##size(const maptype *map);                                 \
   prefix##iter_t *prefix##iter_init(maptype *map);                      \
@@ -368,6 +370,16 @@ DECLARE_MAP_FNS(digestmap_t, const char *, digestmap_);
  * table. */
 DECLARE_MAP_FNS(digest256map_t, const uint8_t *, digest256map_);
 
+#define MAP_FREE_AND_NULL(maptype, map, fn)     \
+  do {                                          \
+    maptype ## _free_((map), (fn));             \
+    (map) = NULL;                               \
+  } while (0)
+
+#define strmap_free(map, fn) MAP_FREE_AND_NULL(strmap, (map), (fn))
+#define digestmap_free(map, fn) MAP_FREE_AND_NULL(digestmap, (map), (fn))
+#define digest256map_free(map, fn) MAP_FREE_AND_NULL(digest256map, (map), (fn))
+
 #undef DECLARE_MAP_FNS
 
 /** Iterates over the key-value pairs in a map <b>map</b> in order.
@@ -528,9 +540,9 @@ void* strmap_remove_lc(strmap_t *map, const char *key);
     return (valtype*)digestmap_remove((digestmap_t*)map, key);          \
   }                                                                     \
   ATTR_UNUSED static inline void                                        \
-  prefix##f##ree(maptype *map, void (*free_val)(void*))                 \
+  prefix##f##ree_(maptype *map, void (*free_val)(void*))                \
   {                                                                     \
-    digestmap_free((digestmap_t*)map, free_val);                        \
+    digestmap_free_((digestmap_t*)map, free_val);                       \
   }                                                                     \
   ATTR_UNUSED static inline int                                         \
   prefix##isempty(maptype *map)                                         \
@@ -614,10 +626,12 @@ bitarray_expand(bitarray_t *ba,
 }
 /** Free the bit array <b>ba</b>. */
 static inline void
-bitarray_free(bitarray_t *ba)
+bitarray_free_(bitarray_t *ba)
 {
   tor_free(ba);
 }
+#define bitarray_free(ba) FREE_AND_NULL(bitarray, (ba))
+
 /** Set the <b>bit</b>th bit in <b>b</b> to 1. */
 static inline void
 bitarray_set(bitarray_t *b, int bit)
@@ -679,7 +693,8 @@ digestset_contains(const digestset_t *set, const char *digest)
 #undef BIT
 
 digestset_t *digestset_new(int max_elements);
-void digestset_free(digestset_t* set);
+void digestset_free_(digestset_t* set);
+#define digestset_free(set) FREE_AND_NULL(digestset, (set))
 
 /* These functions, given an <b>array</b> of <b>n_elements</b>, return the
  * <b>nth</b> lowest element. <b>nth</b>=0 gives the lowest element;
diff --git a/src/or/config.c b/src/or/config.c
index b0a140d23b..fac3a36d10 100644
--- a/src/or/config.c
+++ b/src/or/config.c
@@ -778,7 +778,7 @@ static or_options_t *global_default_options = NULL;
 /** Name of most recently read torrc file. */
 static char *torrc_fname = NULL;
 /** Name of the most recently read torrc-defaults file.*/
-static char *torrc_defaults_fname;
+static char *torrc_defaults_fname = NULL;
 /** Configuration options set by command line. */
 static config_line_t *global_cmdline_options = NULL;
 /** Non-configuration options set by the command line */
@@ -977,6 +977,8 @@ config_free_all(void)
 
   tor_free(the_short_tor_version);
   tor_free(the_tor_version);
+
+  have_parsed_cmdline = 0;
 }
 
 /** Make <b>address</b> -- a piece of information related to our operation as
diff --git a/src/or/router.c b/src/or/router.c
index 8ad5d038ef..614d76a361 100644
--- a/src/or/router.c
+++ b/src/or/router.c
@@ -3698,6 +3698,7 @@ router_free_all(void)
   crypto_pk_free(lastonionkey);
   crypto_pk_free(server_identitykey);
   crypto_pk_free(client_identitykey);
+
   tor_mutex_free(key_lock);
   routerinfo_free(desc_routerinfo);
   extrainfo_free(desc_extrainfo);
diff --git a/src/or/routerlist.c b/src/or/routerlist.c
index fb8225e0d6..50d5cc1abc 100644
--- a/src/or/routerlist.c
+++ b/src/or/routerlist.c
@@ -143,6 +143,10 @@ DECLARE_TYPED_DIGESTMAP_FNS(dsmap_, digest_ds_map_t, download_status_t)
 #define DSMAP_FOREACH(map, keyvar, valvar) \
   DIGESTMAP_FOREACH(dsmap_to_digestmap(map), keyvar, download_status_t *, \
                     valvar)
+#define eimap_free(map, fn) MAP_FREE_AND_NULL(eimap, (map), (fn))
+#define rimap_free(map, fn) MAP_FREE_AND_NULL(rimap, (map), (fn))
+#define dsmap_free(map, fn) MAP_FREE_AND_NULL(dsmap, (map), (fn))
+#define sdmap_free(map, fn) MAP_FREE_AND_NULL(sdmap, (map), (fn))
 
 /* Forward declaration for cert_list_t */
 typedef struct cert_list_t cert_list_t;
diff --git a/src/test/test_dir.c b/src/test/test_dir.c
index ee4a9780b1..4cab307ce1 100644
--- a/src/test/test_dir.c
+++ b/src/test/test_dir.c
@@ -664,7 +664,7 @@ test_dir_extrainfo_parsing(void *arg)
   escaped(NULL);
   extrainfo_free(ei);
   routerinfo_free(ri);
-  digestmap_free((digestmap_t*)map, routerinfo_free_wrapper_);
+  digestmap_free_((digestmap_t*)map, routerinfo_free_wrapper_);
 }
 
 static void
@@ -760,7 +760,7 @@ test_dir_parse_router_list(void *arg)
   smartlist_free(chunks);
   routerinfo_free(ri);
   if (map) {
-    digestmap_free((digestmap_t*)map, routerinfo_free_wrapper_);
+    digestmap_free_((digestmap_t*)map, routerinfo_free_wrapper_);
     router_get_routerlist()->identity_map =
       (struct digest_ri_map_t*)digestmap_new();
   }
diff --git a/src/test/test_routerset.c b/src/test/test_routerset.c
index 6da2275c35..8eb19c3c21 100644
--- a/src/test/test_routerset.c
+++ b/src/test/test_routerset.c
@@ -2084,28 +2084,28 @@ NS(test_main)(void *arg)
  * Structural test for routerset_free, where the routerset is NULL.
  */
 
-NS_DECL(void, smartlist_free, (smartlist_t *sl));
+NS_DECL(void, smartlist_free_, (smartlist_t *sl));
 
 static void
 NS(test_main)(void *arg)
 {
   (void)arg;
 
-  NS_MOCK(smartlist_free);
+  NS_MOCK(smartlist_free_);
 
   routerset_free(NULL);
 
-  tt_int_op(CALLED(smartlist_free), OP_EQ, 0);
+  tt_int_op(CALLED(smartlist_free_), OP_EQ, 0);
 
   done:
     ;
 }
 
 void
-NS(smartlist_free)(smartlist_t *s)
+NS(smartlist_free_)(smartlist_t *s)
 {
   (void)s;
-  CALLED(smartlist_free)++;
+  CALLED(smartlist_free_)++;
 }
 
 #undef NS_SUBMODULE
@@ -2115,9 +2115,9 @@ NS(smartlist_free)(smartlist_t *s)
  * Structural test for routerset_free.
  */
 
-NS_DECL(void, smartlist_free, (smartlist_t *sl));
-NS_DECL(void, strmap_free,(strmap_t *map, void (*free_val)(void*)));
-NS_DECL(void, digestmap_free, (digestmap_t *map, void (*free_val)(void*)));
+NS_DECL(void, smartlist_free_, (smartlist_t *sl));
+NS_DECL(void, strmap_free_,(strmap_t *map, void (*free_val)(void*)));
+NS_DECL(void, digestmap_free_, (digestmap_t *map, void (*free_val)(void*)));
 
 static void
 NS(test_main)(void *arg)
@@ -2125,39 +2125,39 @@ NS(test_main)(void *arg)
   routerset_t *routerset = routerset_new();
   (void)arg;
 
-  NS_MOCK(smartlist_free);
-  NS_MOCK(strmap_free);
-  NS_MOCK(digestmap_free);
+  NS_MOCK(smartlist_free_);
+  NS_MOCK(strmap_free_);
+  NS_MOCK(digestmap_free_);
 
   routerset_free(routerset);
 
-  tt_int_op(CALLED(smartlist_free), OP_NE, 0);
-  tt_int_op(CALLED(strmap_free), OP_NE, 0);
-  tt_int_op(CALLED(digestmap_free), OP_NE, 0);
+  tt_int_op(CALLED(smartlist_free_), OP_NE, 0);
+  tt_int_op(CALLED(strmap_free_), OP_NE, 0);
+  tt_int_op(CALLED(digestmap_free_), OP_NE, 0);
 
   done:
     ;
 }
 
 void
-NS(smartlist_free)(smartlist_t *s)
+NS(smartlist_free_)(smartlist_t *s)
 {
-  CALLED(smartlist_free)++;
-  smartlist_free__real(s);
+  CALLED(smartlist_free_)++;
+  smartlist_free___real(s);
 }
 
 void
-NS(strmap_free)(strmap_t *map, void (*free_val)(void*))
+NS(strmap_free_)(strmap_t *map, void (*free_val)(void*))
 {
-  CALLED(strmap_free)++;
-  strmap_free__real(map, free_val);
+  CALLED(strmap_free_)++;
+  strmap_free___real(map, free_val);
 }
 
 void
-NS(digestmap_free)(digestmap_t *map, void (*free_val)(void*))
+NS(digestmap_free_)(digestmap_t *map, void (*free_val)(void*))
 {
-  CALLED(digestmap_free)++;
-  digestmap_free__real(map, free_val);
+  CALLED(digestmap_free_)++;
+  digestmap_free___real(map, free_val);
 }
 
 #undef NS_SUBMODULE