--- tests/bad-filenames.orig	2025-02-27 13:33:25 UTC
+++ tests/bad-filenames
@@ -200,3 +200,11 @@ No file to patch.  Skipping patch.
 1 out of 1 hunk ignored
 status: 1
 EOF
+
+# Empty filenames are not allowed:
+
+check 'emit_patch f | patch -r- "" || echo status: $?' <<EOF
+File '' is not a regular file -- refusing to patch
+1 out of 1 hunk ignored
+status: 1
+EOF