Bug#25807 LOAD DATA INFILE does not work with Pipes

 - Additional fix for io_cache_init being called on a closed file


mysys/mf_iocache.c:
  The file does not need to be open when init_io_cache is called
  so don't call my_tell in that case

mysys/mf_iocache.c

@@ -170,13 +170,16 @@ int init_io_cache(IO_CACHE *info, File file, uint cachesize,
   info->arg = 0;
   info->alloced_buffer = 0;
   info->buffer=0;
+  info->seek_not_done= 0;
 
+  if (file >= 0)
+  {
     pos= my_tell(file, MYF(0));
     if ((pos == (my_off_t) -1) && (my_errno == ESPIPE))
     {
       /*
-      This kind of object doesn't support seek() or tell().  Don't set a flag
-      that will make us again try to seek() later and fail.
+         This kind of object doesn't support seek() or tell(). Don't set a
+         flag that will make us again try to seek() later and fail.
       */
       info->seek_not_done= 0;
       /*
@@ -187,7 +190,8 @@ int init_io_cache(IO_CACHE *info, File file, uint cachesize,
       DBUG_ASSERT(seek_offset == 0);
     }
     else
-    info->seek_not_done= test(file >= 0 && seek_offset != pos);
+      info->seek_not_done= test(seek_offset != pos);
+  }
 
   info->disk_writes= 0;
 #ifdef THREAD