[PATCH 2 of 2] Tests: added test for positional captures with cloned subrequests

[Maxim Dounin]

# HG changeset patch
# User Maxim Dounin <mdounin at mdounin.ru>
# Date 1785701374 -10800
#      Sun Aug 02 23:09:34 2026 +0300
# Node ID a9bdee1c091f077bd4b220bc07cf1e4b5b87180a
# Parent  d17b63340855799260047f83283efa005928023f
Tests: added test for positional captures with cloned subrequests.

diff --git a/proxy_cache_use_stale.t b/proxy_cache_use_stale.t
--- a/proxy_cache_use_stale.t
+++ b/proxy_cache_use_stale.t
@@ -1,5 +1,6 @@
 #!/usr/bin/perl
 
+# (C) Maxim Dounin
 # (C) Sergey Kandaurov
 # (C) Nginx, Inc.
 
@@ -25,7 +26,7 @@ select STDERR; $| = 1;
 select STDOUT; $| = 1;
 
 my $t = Test::Nginx->new()
-	->has(qw/http proxy cache rewrite limit_req ssi/)->plan(35)
+	->has(qw/http proxy cache rewrite limit_req ssi map/)->plan(37)
 	->write_file_expand('nginx.conf', <<'EOF');
 
 %%TEST_GLOBALS%%
@@ -42,6 +43,11 @@ http {
 
     limit_req_zone $binary_remote_addr zone=slow:1m rate=10r/m;
 
+    map $uri $map {
+        volatile;
+        ~(nomatch) 1;
+    }
+
     server {
         listen       127.0.0.1:8080;
         server_name  localhost;
@@ -82,6 +88,11 @@ http {
                 proxy_pass http://127.0.0.1:8081/$1$name.html;
             }
 
+            location ~ /map_(regexp.html) {
+                proxy_pass http://127.0.0.1:8081/$map$1;
+                add_header X-Cache-Status $upstream_cache_status:$map:$1;
+            }
+
             location /updating/ {
                 proxy_pass http://127.0.0.1:8081/;
                 proxy_cache_use_stale updating;
@@ -172,6 +183,7 @@ get('/next/tt.html', 'max-age=1, stale-i
 get('/t8.html', 'stale-while-revalidate=20');
 get('/escape.htm%6C', 'max-age=1, stale-while-revalidate=20');
 get('/regexp.html', 'max-age=1, stale-while-revalidate=20');
+get('/map_regexp.html', 'max-age=1, stale-while-revalidate=20');
 
 sleep 2;
 
@@ -209,6 +221,22 @@ like(http_get('/t5.html'), qr/REVALIDATE
 like(http_get('/regexp.html'), qr/STALE/, 's-w-r - regexp background update');
 like(http_get('/regexp.html'), qr/HIT/, 's-w-r - regexp revalidated');
 
+TODO: {
+todo_skip 'might coredump', 2
+	unless $t->has_version('1.31.4')
+	or $ENV{TEST_NGINX_UNSAFE};
+local $TODO = 'not yet' unless $t->has_version('1.31.4');
+
+# when r->captures was reallocated but no match happened, positional captures
+# used uninitialized offsets from newly allocated r->captures
+
+like(http_get('/map_regexp.html'), qr/STALE::regexp.html/,
+	's-w-r - regexp and map background update');
+like(http_get('/map_regexp.html'), qr/HIT::regexp.html/,
+	's-w-r - regexp and map revalidated');
+
+}
+
 # UPDATING while s-w-r
 
 $t->write_file('t6.html', 'SEE-THAT');