Display error when getting row to edit

adminer/edit.inc.php

@@ -82,9 +82,13 @@ if ($_POST["save"]) {
 	}
 	if ($select) {
 		$result = $driver->select($TABLE, $select, array($where), $select, array(), (isset($_GET["select"]) ? 2 : 1));
-		$row = $result->fetch_assoc();
-		if (!$row) { // MySQLi returns null
-			$row = false;
+		if (!$result) {
+			$error = error();
+		} else {
+			$row = $result->fetch_assoc();
+			if (!$row) { // MySQLi returns null
+				$row = false;
+			}
 		}
 		if (isset($_GET["select"]) && (!$row || $result->fetch_assoc())) { // $result->num_rows != 1 isn't available in all drivers
 			$row = null;

changes.txt

@@ -2,6 +2,7 @@ Adminer 4.5.0-dev:
 Display newlines in column comments (bug #573)
 Support current_timestamp() as default of time fields (bug #572)
 Hide window.opener from pages opened in a new window (bug #561)
+Display error when getting row to edit
 Store current Adminer version server-side to avoid excessive requests
 Adminer: Fix Search data in tables (regression from 4.4.0)
 CSP: Allow any styles, images, media and fonts, disallow base-uri