End a request quietly when the client has gone

A write that failed with EPIPE on an uncached page died into an error
page, which died again at exit when the page could not be sent either,
and git logged a recursion warning on every dropped connection. A
filter that exits early fails a write the same way, so the quiet exit
is kept for writes that reach the client itself.

1 file changed, 3 insertions, 1 deletion

diff --git a/source/cgit.c b/source/cgit.c
index 3e47dbe..633b011 100644
--- a/source/cgit.c
+++ b/source/cgit.c
@@ -1380,7 +1380,9 @@ int cmd_main(int argc, const char **argv)
 	strbuf_release(&cache_key);
 
 	cgit_cleanup_filters();
-	if (err)
+	// A slot that could not be sent because the client went away is not
+	// worth an error page nobody will read.
+	if (err && err != EPIPE)
 		cgit_print_error("Error processing page: %s (%d)", strerror(err), err);
 	return err;
 }