1 files changed, 6 insertions, 1 deletions
diff --git a/mysys/mf_iocache.c b/mysys/mf_iocache.c
index f9e51e48189..02e5c5373ae 100644
--- a/mysys/mf_iocache.c
+++ b/mysys/mf_iocache.c
@@ -1527,8 +1527,13 @@ int _my_b_get(IO_CACHE *info)
 int _my_b_write(register IO_CACHE *info, const uchar *Buffer, size_t Count)
 {
   size_t rest_length,length;
+  my_off_t pos_in_file= info->pos_in_file;
 
-  if (info->pos_in_file+info->buffer_length > info->end_of_file)
+  DBUG_EXECUTE_IF("simulate_huge_load_data_file",
+                  {
+                    pos_in_file=(my_off_t)(5000000000ULL);
+                  });
+  if (pos_in_file+info->buffer_length > info->end_of_file)
   {
     my_errno=errno=EFBIG;
     return info->error = -1;