Reorder the code so the assertion of mis->from_src_file occurs before
the call to migration_ioc_unregister_yank_from_file, which dereferences
it in qemu_file_get_ioc.

Fixes: 39675ffffb3394 ("migration: Move the yank unregister of channel_close out")
Signed-off-by: Sergei Heifetz <heifetz@yandex-team.com>
---
 migration/savevm.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/migration/savevm.c b/migration/savevm.c
index 3dc812a7bb..930a3391e3 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -2885,13 +2885,14 @@ static bool postcopy_pause_incoming(MigrationIncomingState *mis)
 
     assert(migrate_postcopy_ram());
 
+    assert(mis->from_src_file);
+
     /*
      * Unregister yank with either from/to src would work, since ioc behind it
      * is the same
      */
     migration_ioc_unregister_yank_from_file(mis->from_src_file);
 
-    assert(mis->from_src_file);
     qemu_file_shutdown(mis->from_src_file);
     qemu_fclose(mis->from_src_file);
     mis->from_src_file = NULL;
-- 
2.34.1