From eda749260448c2cfbc628592c0943263d03d7119 Mon Sep 17 00:00:00 2001
From: Nikita Popov <nikita.ppv@gmail.com>
Date: Wed, 11 Nov 2020 15:56:05 +0100
Subject: Handle errors during next_result()

---
 ext/mysqli/mysqli_api.c                        | 12 ++++-
 ext/mysqli/tests/mysqli_next_result_error.phpt | 67 ++++++++++++++++++++++++++
 ext/mysqli/tests/mysqli_report.phpt            |  6 +++
 3 files changed, 83 insertions(+), 2 deletions(-)
 create mode 100644 ext/mysqli/tests/mysqli_next_result_error.phpt

diff --git a/ext/mysqli/mysqli_api.c b/ext/mysqli/mysqli_api.c
index 9a54171b30..9896ab8eda 100644
--- a/ext/mysqli/mysqli_api.c
+++ b/ext/mysqli/mysqli_api.c
@@ -1608,7 +1608,11 @@ PHP_FUNCTION(mysqli_next_result) {
 	}
 	MYSQLI_FETCH_RESOURCE_CONN(mysql, mysql_link, MYSQLI_STATUS_VALID);
 
-	RETURN_BOOL(!mysql_next_result(mysql->mysql));
+	if (mysql_next_result(mysql->mysql)) {
+		MYSQLI_REPORT_MYSQL_ERROR(mysql->mysql);
+		RETURN_FALSE;
+	}
+	RETURN_TRUE;
 }
 /* }}} */
 
@@ -1640,7 +1644,11 @@ PHP_FUNCTION(mysqli_stmt_next_result) {
 	}
 	MYSQLI_FETCH_RESOURCE_STMT(stmt, mysql_stmt, MYSQLI_STATUS_VALID);
 
-	RETURN_BOOL(!mysql_stmt_next_result(stmt->stmt));
+	if (mysql_stmt_next_result(stmt->stmt)) {
+		MYSQLI_REPORT_STMT_ERROR(stmt->stmt);
+		RETURN_FALSE;
+	}
+	RETURN_TRUE;
 }
 /* }}} */
 #endif
diff --git a/ext/mysqli/tests/mysqli_next_result_error.phpt b/ext/mysqli/tests/mysqli_next_result_error.phpt
new file mode 100644
index 0000000000..4118bd0eab
--- /dev/null
+++ b/ext/mysqli/tests/mysqli_next_result_error.phpt
@@ -0,0 +1,67 @@
+--TEST--
+Error in multi query
+--SKIPIF--
+<?php
+require_once('skipif.inc');
+require_once('skipifconnectfailure.inc');
+?>
+--FILE--
+<?php
+
+require_once __DIR__ . '/connect.inc';
+
+mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
+
+$mysqli = new mysqli($host, $user, $passwd, $db, $port, $socket);
+
+$mysqli->multi_query("SELECT 1; SELECT 2; Syntax Error");
+
+try {
+    do {
+        if ($res = $mysqli->store_result()) {
+            var_dump($res->fetch_all(MYSQLI_ASSOC));
+            $res->free();
+        }
+    } while ($mysqli->more_results() && $mysqli->next_result());
+} catch (mysqli_sql_exception $e) {
+    echo $e->getMessage(), "\n";
+}
+
+$mysqli->query("DROP PROCEDURE IF EXISTS p");
+$mysqli->query('CREATE PROCEDURE p() READS SQL DATA BEGIN SELECT 1; SELECT foobar FROM table_that_does_not_exist; END;');
+
+$stmt = $mysqli->prepare("CALL p()");
+$stmt->execute();
+
+try {
+    do {
+        $stmt->bind_result($num);
+        while ($stmt->fetch()) {
+            echo "num = $num\n";
+        }
+    } while ($stmt->more_results() && $stmt->next_result());
+} catch (mysqli_sql_exception $e) {
+    echo $e->getMessage(), "\n";
+}
+
+$mysqli->query("DROP PROCEDURE IF EXISTS p");
+
+?>
+--EXPECTF--
+array(1) {
+  [0]=>
+  array(1) {
+    [1]=>
+    string(1) "1"
+  }
+}
+array(1) {
+  [0]=>
+  array(1) {
+    [2]=>
+    string(1) "2"
+  }
+}
+You have an error in your SQL syntax; %s
+num = 1
+Table '%s.table_that_does_not_exist' doesn't exist
diff --git a/ext/mysqli/tests/mysqli_report.phpt b/ext/mysqli/tests/mysqli_report.phpt
index 3373097697..7a343bdef8 100644
--- a/ext/mysqli/tests/mysqli_report.phpt
+++ b/ext/mysqli/tests/mysqli_report.phpt
@@ -331,8 +331,14 @@ Warning: mysqli_rollback(): (%s/%d): Commands out of sync; you can't run this co
 
 Warning: mysqli_stmt_prepare(): (%s/%d): Commands out of sync; you can't run this command now in %s on line %d
 
+Warning: mysqli_next_result(): (%s/%d): Commands out of sync; you can't run this command now in %s on line %d
+
+Warning: mysqli_next_result(): (%s/%d): You have an error in your SQL syntax; check the manual that corresponds to your %s server version for the right syntax to use near 'FOO' at line 1 in %s on line %d
+
 Warning: mysqli_store_result(): (%s/%d): You have an error in your SQL syntax; check the manual that corresponds to your %s server version for the right syntax to use near 'FOO' at line 1 in %s on line %d
 
+Warning: mysqli_next_result(): (%s/%d): You have an error in your SQL syntax; check the manual that corresponds to your %s server version for the right syntax to use near 'FOO' at line 1 in %s on line %d
+
 Warning: mysqli_stmt_attr_set(): (%s/%d): Not implemented in %s on line %d
 
 Warning: mysqli_kill(): processid should have positive value in %s on line %d
-- 
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