X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=youtube_dl%2Fdownloader%2Ffragment.py;h=6f6fb4a77a9dc2b3e4e4278bc51b12755bc709ee;hb=2f0eb0a68a0711e7ac2c31b6177273433fb42b94;hp=d529ae09ad14d38e8cc6b8659ebf5fd982e26406;hpb=27e70a8f6cc3f002983a31850fad81c572ced277;p=youtube-dl

diff --git a/youtube_dl/downloader/fragment.py b/youtube_dl/downloader/fragment.py
index d529ae09a..6f6fb4a77 100644
--- a/youtube_dl/downloader/fragment.py
+++ b/youtube_dl/downloader/fragment.py
@@ -49,7 +49,7 @@ class FragmentFD(FileDownloader):
                 index:  0-based index of current fragment among all fragments
             fragment_count:
                 Total count of fragments
-                
+
     This feature is experimental and file format may change in future.
     """
 
@@ -151,10 +151,15 @@ class FragmentFD(FileDownloader):
         if self.__do_ytdl_file(ctx):
             if os.path.isfile(encodeFilename(self.ytdl_filename(ctx['filename']))):
                 self._read_ytdl_file(ctx)
+                if ctx['fragment_index'] > 0 and resume_len == 0:
+                    self.report_error(
+                        'Inconsistent state of incomplete fragment download. '
+                        'Restarting from the beginning...')
+                    ctx['fragment_index'] = resume_len = 0
+                    self._write_ytdl_file(ctx)
             else:
                 self._write_ytdl_file(ctx)
-            if ctx['fragment_index'] > 0:
-                assert resume_len > 0
+                assert ctx['fragment_index'] == 0
 
         dest_stream, tmpfilename = sanitize_open(tmpfilename, open_mode)