1 file changed, 6 insertions, 2 deletions
diff --git a/source/filter.c b/source/filter.c
index ec48007..b36f03e 100644
--- a/source/filter.c
+++ b/source/filter.c
@@ -225,15 +225,19 @@ static inline int emit_unfiltered(lua_State *lua_state, void (*emit)(const char
 	if (!text)
 		return 0;
 
+	// A script that writes while it is still loading runs before cgit has
+	// hooked stdout for it, so there is no hook to take off.
 	saved_write = filter_write;
 	saved_filter = current_write_filter;
-	unhook_write();
+	if (saved_write)
+		unhook_write();
 	emit(text);
 	// emit leaves bytes in the html buffer, so empty it while the hook is
 	// still off. Re-hooking first would send the page's own bytes back into
 	// the filter.
 	html_flush();
-	hook_write(saved_filter, saved_write);
+	if (saved_write)
+		hook_write(saved_filter, saved_write);
 
 	return 0;
 }