X-Git-Url: https://git.mdrn.pl/librarian.git/blobdiff_plain/8495b2ce8e9aebe778db74217b60fb68c0b5f9f2..af72c4ed58e541d491dafbfe4ecb163662f402b5:/src/librarian/covers/utils/textbox.py

diff --git a/src/librarian/covers/utils/textbox.py b/src/librarian/covers/utils/textbox.py
index a5097ed..cc9c501 100644
--- a/src/librarian/covers/utils/textbox.py
+++ b/src/librarian/covers/utils/textbox.py
@@ -80,6 +80,8 @@ class TextBox:
     def find_grouping(self, groups, ngroups, glue):
         best = None
         best_var = None
+        if not groups:
+            return []
 
         mean = sum(g[0] for g in groups) + (len(groups) - ngroups) * glue
         if mean > self.width * ngroups: