From 826443926f85b72840b49cd7973e91ed80a09b5d Mon Sep 17 00:00:00 2001
From: John MacFarlane <jgm@berkeley.edu>
Date: Mon, 16 Dec 2013 13:58:54 -0800
Subject: Docbook reader: Avoid failure if tbody contains no tr or row
 elements.

---
 src/Text/Pandoc/Readers/DocBook.hs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/Text/Pandoc/Readers/DocBook.hs b/src/Text/Pandoc/Readers/DocBook.hs
index fc29988d5..03c6140ac 100644
--- a/src/Text/Pandoc/Readers/DocBook.hs
+++ b/src/Text/Pandoc/Readers/DocBook.hs
@@ -806,7 +806,9 @@ parseBlock (Elem e) =
                                                      (x >= '0' && x <= '9')
                                                       || x == '.') w
                                                 Nothing -> 0 :: Double
-                      let numrows = maximum $ map length bodyrows
+                      let numrows = case bodyrows of
+                                         []   -> 0
+                                         xs   -> maximum $ map length xs
                       let aligns = case colspecs of
                                      []  -> replicate numrows AlignDefault
                                      cs  -> map toAlignment cs
-- 
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