new file mode 100644
--- /dev/null
+++ b/fastcgi_split.t
@@ -0,0 +1,103 @@
+#!/usr/bin/perl
+
+# (C) Maxim Dounin
+
+# Test for fastcgi backend.
+# Incorrect split headers handling after switching to next server,
+# as reported by Lucas Molas.
+
+###############################################################################
+
+use warnings;
+use strict;
+
+use Test::More;
+use Socket qw/ CR LF CRLF /;
+
+BEGIN { use FindBin; chdir($FindBin::Bin); }
+
+use lib 'lib';
+use Test::Nginx;
+
+###############################################################################
+
+select STDERR; $| = 1;
+select STDOUT; $| = 1;
+
+eval { require FCGI; };
+plan(skip_all => 'FCGI not installed') if $@;
+plan(skip_all => 'win32') if $^O eq 'MSWin32';
+
+my $t = Test::Nginx->new()->has(qw/http fastcgi/)->plan(1)
+	->write_file_expand('nginx.conf', <<'EOF');
+
+%%TEST_GLOBALS%%
+
+daemon off;
+
+events {
+}
+
+http {
+    %%TEST_GLOBALS_HTTP%%
+
+    upstream u {
+        server 127.0.0.1:8081;
+        server 127.0.0.1:8082;
+    }
+
+    server {
+        listen       127.0.0.1:8080;
+        server_name  localhost;
+
+        location / {
+            fastcgi_pass u;
+            fastcgi_param REQUEST_URI $request_uri;
+            fastcgi_next_upstream invalid_header;
+        }
+    }
+}
+
+EOF
+
+$t->run_daemon(\&fastcgi_daemon, 8081);
+$t->run_daemon(\&fastcgi_daemon, 8082);
+
+$t->run();
+
+$t->waitforsocket('127.0.0.1:8081');
+$t->waitforsocket('127.0.0.1:8082');
+
+###############################################################################
+
+TODO: {
+local $TODO = 'not yet' unless $t->has_version('1.5.12');
+
+like(http_get('/'), qr/^Good: header/ms, 'fastcgi next upstream');
+
+}
+
+###############################################################################
+
+sub fastcgi_daemon {
+	my ($port) = @_;
+	my $socket = FCGI::OpenSocket("127.0.0.1:$port", 5);
+	my $request = FCGI::Request(\*STDIN, \*STDOUT, \*STDERR, \%ENV,
+		$socket);
+
+	my $count;
+	while( $request->Accept() >= 0 ) {
+		$count++;
+
+		if ($port == 8081) {
+			print 'BAD';
+		}
+		if ($port == 8082) {
+			print 'Good: header' . CRLF . CRLF;
+		}
+	}
+
+	FCGI::CloseSocket($socket);
+}
+
+###############################################################################