Fix some memory leaks.

	* src/named-ref.c: Add a pointer check (named_ref_free).
	* src/scan-code.l: New function (variant_table_free). Called in
	code_scanner_free.
	* src/symlist.c: Call to named_ref_free (symbol_list_free).

3 files changed, 21 insertions, 2 deletions

diff --git a/src/named-ref.c b/src/named-ref.c
index 4388acba..41d9dc17 100644
--- a/src/named-ref.c
+++ b/src/named-ref.c
@@ -36,6 +36,7 @@ named_ref_new (uniqstr id, location loc)
 void
 named_ref_free (named_ref *r)
 {
-  free (r);
+  if (r)
+    free (r);
 }
 
diff --git a/src/scan-code.l b/src/scan-code.l
index 47cde77e..d57eafa3 100644
--- a/src/scan-code.l
+++ b/src/scan-code.l
@@ -350,6 +350,15 @@ variant_table_grow ()
   return &variant_table[variant_count - 1];
 }
 
+static void
+variant_table_free ()
+{
+  if (variant_table)
+    free (variant_table);
+  variant_table = 0;
+  variant_table_size = variant_count = 0;
+}
+
 static char *
 find_prefix_end (const char *prefix, char *begin, char *end)
 {
@@ -865,6 +874,8 @@ void
 code_scanner_free (void)
 {
   obstack_free (&obstack_for_string, 0);
+  variant_table_free ();
+
   /* Reclaim Flex's buffers.  */
   yylex_destroy ();
 }
diff --git a/src/symlist.c b/src/symlist.c
index b3500d2d..1ffad2b6 100644
--- a/src/symlist.c
+++ b/src/symlist.c
@@ -146,7 +146,14 @@ symbol_list_prepend (symbol_list *list, symbol_list *node)
 void
 symbol_list_free (symbol_list *list)
 {
-  LIST_FREE (symbol_list, list);
+  symbol_list *node, *next;
+  for (node = list; node; node = next)
+    {
+      next = node->next;
+      if (node->named_ref)
+        named_ref_free (node->named_ref);
+      free (node);
+    }
 }