fix leak when the rewriteContext is disabled (ITS#3256)

diff --git a/libraries/librewrite/context.c b/libraries/librewrite/context.c
index 03e1e745381b93e84ebc4bf6b757b07450cee74a..aad9f0a0df65f00e6d62e473852047b076fb8062 100644 (file)
--- a/libraries/librewrite/context.c
+++ b/libraries/librewrite/context.c
@@ -218,10 +218,10 @@ rewrite_context_apply(
        assert( op->lo_depth > 0 );
 
        Debug( LDAP_DEBUG_TRACE, "==> rewrite_context_apply"
-                       " [depth=%d] string='%s'\n%s",
-                       op->lo_depth, string, "" );
+                       " [depth=%d] string='%s'\n",
+                       op->lo_depth, string, 0 );
        
-       s = strdup( string );
+       s = (char *)string;
        
        for ( rule = context->lc_rule->lr_next;
                        rule != NULL && op->lo_num_passes < info->li_max_passes;
@@ -296,7 +296,7 @@ rewrite_context_apply(
 
                                if ( do_continue ) {
                                        if ( rule->lr_next == NULL ) {
-                                               res = s;
+                                               res = ( s == string ? strdup( s ) : s );
                                        }
                                        goto rc_continue;
                                }
@@ -321,7 +321,9 @@ rewrite_context_apply(
                        if ( res != NULL ) {
                                struct rewrite_action *action;
                                
-                               free( s );
+                               if (s != string ) {
+                                       free( s );
+                               }
                                s = res;
 
                                for ( action = rule->lr_action;
@@ -379,7 +381,7 @@ rewrite_context_apply(
                         * result back to the string
                         */
                        } else if ( rule->lr_next == NULL ) {
-                               res = s;
+                               res = ( s == string ? strdup( s ) : s );
                        }
                        
                        break;