nginx-0.3.42-RELEASE import

    *) Feature: the "bind" option of the "listen" directive in IMAP/POP3
       proxy.

    *) Bugfix: if the same capture in the "rewrite" directive was used more
       then once.

    *) Bugfix: the $sent_http_content_type, $sent_http_content_length,
       $sent_http_last_modified, $sent_http_connection,
       $sent_http_keep_alive, and $sent_http_transfer_encoding variables
       were not written to access log.

    *) Bugfix: the $sent_http_cache_control returned value of the single
       "Cache-Control" response header line.

src/http/ngx_http_script.c

diff --git a/src/http/ngx_http_script.c b/src/http/ngx_http_script.c
index 5a52456..9826ece 100644
--- a/src/http/ngx_http_script.c
+++ b/src/http/ngx_http_script.c
@@ -91,6 +91,14 @@
 
             if (sc->source->data[i] >= '1' && sc->source->data[i] <= '9') {
 
+                n = sc->source->data[i] - '0';
+
+                if (sc->captures_mask & (1 << n)) {
+                    sc->dup_capture = 1;
+                }
+
+                sc->captures_mask |= 1 << n;
+
                 copy_capture = ngx_http_script_add_code(*sc->lengths,
                                    sizeof(ngx_http_script_copy_capture_code_t),
                                    NULL);
@@ -100,7 +108,8 @@
 
                 copy_capture->code = (ngx_http_script_code_pt)
                                          ngx_http_script_copy_capture_len_code;
-                copy_capture->n = 2 * (sc->source->data[i] - '0');
+                copy_capture->n = 2 * n;
+
 
                 copy_capture = ngx_http_script_add_code(*sc->values,
                                    sizeof(ngx_http_script_copy_capture_code_t),
@@ -110,14 +119,12 @@
                 }
 
                 copy_capture->code = ngx_http_script_copy_capture_code;
-                copy_capture->n = sc->source->data[i] - '0';
+                copy_capture->n = 2 * n;
 
-                if (sc->ncaptures < copy_capture->n) {
-                    sc->ncaptures = copy_capture->n;
+                if (sc->ncaptures < n) {
+                    sc->ncaptures = n;
                 }
 
-                copy_capture->n *= 2;
-
                 i++;
 
                 continue;