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-rw-r--r--sql/sql_test.cc5
1 files changed, 4 insertions, 1 deletions
diff --git a/sql/sql_test.cc b/sql/sql_test.cc
index 68d30d5fecb..a3506687a72 100644
--- a/sql/sql_test.cc
+++ b/sql/sql_test.cc
@@ -658,9 +658,12 @@ Memory allocated by threads: %s\n",
void print_keyuse_array_for_trace(THD *thd, DYNAMIC_ARRAY *keyuse_array)
{
+ DBUG_ASSERT(thd->trace_started());
+
Json_writer_object wrapper(thd);
Json_writer_array trace_key_uses(thd, "ref_optimizer_key_uses");
- for(uint i=0; i < keyuse_array->elements; i++)
+
+ for (uint i=0; i < keyuse_array->elements; i++)
{
KEYUSE *keyuse= (KEYUSE*)dynamic_array_ptr(keyuse_array, i);
Json_writer_object keyuse_elem(thd);