[DBAL-2954] Removed error suppression in IBM DB2 Statement

lib/Doctrine/DBAL/Driver/IBMDB2/DB2Statement.php

@@ -172,7 +172,7 @@ class DB2Statement implements \IteratorAggregate, Statement
             }
         }
 
-        $retval = @db2_execute($this->_stmt, $params);
+        $retval = db2_execute($this->_stmt, $params);
 
         if ($retval === false) {
             throw new DB2Exception(db2_stmt_errormsg());

tests/Doctrine/Tests/DBAL/Functional/Driver/IBMDB2/DB2StatementTest.php

+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Tests\DBAL\Functional\Driver\IBMDB2;
+
+use Doctrine\DBAL\Driver\IBMDB2\DB2Driver;
+use Doctrine\Tests\DbalFunctionalTestCase;
+use PHPUnit\Framework\Error\Notice;
+
+class DB2StatementTest extends DbalFunctionalTestCase
+{
+    protected function setUp()
+    {
+        if ( ! extension_loaded('ibm_db2')) {
+            $this->markTestSkipped('ibm_db2 is not installed.');
+        }
+
+        parent::setUp();
+
+        if ( ! $this->_conn->getDriver() instanceof DB2Driver) {
+            $this->markTestSkipped('ibm_db2 only test.');
+        }
+    }
+
+    public function testExecutionErrorsAreNotSuppressed()
+    {
+        $stmt = $this->_conn->prepare('SELECT * FROM SYSIBM.SYSDUMMY1 WHERE \'foo\' = ?');
+
+        // unwrap the statement to prevent the wrapper from handling the PHPUnit-originated exception
+        $wrappedStmt = $stmt->getWrappedStatement();
+
+        $this->expectException(Notice::class);
+        $wrappedStmt->execute([[]]);
+    }
+}