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-rw-r--r--lib/PublicInbox/GitHTTPBackend.pm2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/PublicInbox/GitHTTPBackend.pm b/lib/PublicInbox/GitHTTPBackend.pm
index 1987a013..a069fd94 100644
--- a/lib/PublicInbox/GitHTTPBackend.pm
+++ b/lib/PublicInbox/GitHTTPBackend.pm
@@ -227,7 +227,7 @@ sub serve_smart {
                 $r->[0] == 403 ? serve_dumb($env, $git, $path) : $r;
         };
         my $res;
-        my $async = $env->{'pi-httpd.async'};
+        my $async = $env->{'pi-httpd.async'}; # XXX unstable API
         my $io = $env->{'psgix.io'};
         my $cb = sub {
                 my $r = $rd_hdr->() or return;