From 7d9d77ca44afa0c69abfefe07d7b027f81c8f1a0 Mon Sep 17 00:00:00 2001
From: John MacFarlane <jgm@berkeley.edu>
Date: Tue, 27 Jun 2017 15:25:37 +0200
Subject: Require nonempty alt text for `implicit_figures`.

A figure with an empty caption doesn't make sense.

Closes #2844.
---
 src/Text/Pandoc/Readers/Markdown.hs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'src/Text/Pandoc/Readers')

diff --git a/src/Text/Pandoc/Readers/Markdown.hs b/src/Text/Pandoc/Readers/Markdown.hs
index 31b51f237..49007ad35 100644
--- a/src/Text/Pandoc/Readers/Markdown.hs
+++ b/src/Text/Pandoc/Readers/Markdown.hs
@@ -1035,7 +1035,8 @@ para = try $ do
               result' <- result
               case B.toList result' of
                    [Image attr alt (src,tit)]
-                     | Ext_implicit_figures `extensionEnabled` exts ->
+                     | not (null alt) &&
+                       Ext_implicit_figures `extensionEnabled` exts ->
                         -- the fig: at beginning of title indicates a figure
                         return $ B.para $ B.singleton
                                $ Image attr alt (src,'f':'i':'g':':':tit)
-- 
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