Fixed filesplit corner case infinite loop

diff --git a/filesplit.py b/filesplit.py
index b06d99a..ef7129d 100644 (file)
--- a/filesplit.py
+++ b/filesplit.py
@@ -63,7 +63,7 @@ def split_file(separator, prefix, input_file, new_file_func=None):
             # corner case: separator is between this buf and next one. In this
             # case, we write to current output everything before that and
             # iterate
-            if separator[0] in buf[-sep_len:]:
+            if len(buf) > sep_len and separator[0] in buf[-sep_len:]:
                 output.write(buf[:-sep_len])
                 buf = buf[-sep_len:]
                 continue