X-Git-Url: https://git.stderr.nl/gitweb?p=matthijs%2Fmaster-project%2Freport.git;a=blobdiff_plain;f=pret-trans.lua;h=238a4e5c1d9e798dd9dddbfa3d6dea552b9aa361;hp=ac1b525946364600d9bff3616f14ec6539921cd8;hb=25adb8e7568b748a08f3106fcd30ac81e8cf0d6f;hpb=ee17707ee2e9a69e40eb0897d830d7b582214619

diff --git a/pret-trans.lua b/pret-trans.lua
index ac1b525..238a4e5 100644
--- a/pret-trans.lua
+++ b/pret-trans.lua
@@ -91,7 +91,11 @@ function vis.end_of_display()
             break
         end
     end
-   
+  
+    if not len then
+        error("No horizontal separator found in:\n" .. table.concat(lines, "\n"))
+    end
+
     -- Split the input in three parts. Stuff before the line, stuff
     -- after the line, stuff to the right of the line.
     before, after, rights = {}, {}, {}