--- /dev/null
+--TEST--
+callback sanity
+--SKIPIF--
+<?php include "_skipif.inc"; ?>
+--FILE--
+<?php
+echo "Test\n";
+
+include "_setup.inc";
+
+$c = new pq\Connection(PQ_DSN);
+$c->execAsync("select 1; select 2", function($r) {
+ print_r($r->fetchAll());
+});
+try {
+ $c->execAsync("select 3; select 4", function($r) {
+
+ });
+} catch (Exception $e) {
+ printf("%s\n", $e->getMessage());
+}
+$c->exec("");
+?>
+===DONE===
+--EXPECT--
+Test
+Failed to execute query (another command is already in progress)
+Array
+(
+ [0] => Array
+ (
+ [0] => 1
+ )
+
+)
+Array
+(
+ [0] => Array
+ (
+ [0] => 2
+ )
+
+)
+===DONE===