From 1e778a3b5624f97fdf44a15fd6cee3d615891cff Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marko=20M=C3=A4kel=C3=A4?= <marko.makela@mariadb.com>
Date: Thu, 29 Oct 2020 08:02:33 +0200
Subject: [PATCH] MDEV-21201 fixup: GCC 10.2.0 -Wparentheses

An assertion inadvertently contained an assignment and an implicit
comparison to zero. The intention was to test equality.
---
 sql/sql_show.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sql/sql_show.cc b/sql/sql_show.cc
index 6bd8c9b5c270c..20e3426975252 100644
--- a/sql/sql_show.cc
+++ b/sql/sql_show.cc
@@ -8688,7 +8688,8 @@ static int optimize_schema_tables_memory_usage(TABLE_LIST *table_list)
     {
       Field *field= table->field[i];
       DBUG_ASSERT(field->vcol_info == 0);
-      DBUG_ASSERT(from_recinfo->length= field->pack_length_in_rec());
+      DBUG_ASSERT(from_recinfo->length);
+      DBUG_ASSERT(from_recinfo->length == field->pack_length_in_rec());
       if (bitmap_is_set(table->read_set, i))
       {
         field->move_field(cur);