X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/114e8357e65384e17baaa3c31aa528371e15679b..5d5bf6e0878539baeef797b87636235b8c02be3f:/src/blackd/__init__.py

diff --git a/src/blackd/__init__.py b/src/blackd/__init__.py
index 4f2d87d..6b0f3d3 100644
--- a/src/blackd/__init__.py
+++ b/src/blackd/__init__.py
@@ -152,7 +152,8 @@ async def handle(request: web.Request, executor: Executor) -> web.Response:
         )
 
         # Preserve CRLF line endings
-        if req_str[req_str.find("\n") - 1] == "\r":
+        nl = req_str.find("\n")
+        if nl > 0 and req_str[nl - 1] == "\r":
             formatted_str = formatted_str.replace("\n", "\r\n")
             # If, after swapping line endings, nothing changed, then say so
             if formatted_str == req_str: