lib/markdown: fix crash of the parser when parsing unfinished refs

Signed-off-by: Alexandre Terrasa <alexandre@moz-code.org>

diff --git a/lib/markdown/markdown.nit b/lib/markdown/markdown.nit
index d63f3e4..4ae99fb 100644 (file)
--- a/lib/markdown/markdown.nit
+++ b/lib/markdown/markdown.nit
@@ -213,15 +213,15 @@ class MarkdownProcessor
                if not line.is_empty and line.leading < 4 and line.value[line.leading] == '[' then
                        pos = line.leading + 1
                        pos = md.read_until(id, pos, ']')
-                       if not id.is_empty and pos + 2 < line.value.length then
+                       if not id.is_empty and pos >= 0 and pos + 2 < line.value.length then
                                if line.value[pos + 1] == ':' then
                                        pos += 2
                                        pos = md.skip_spaces(pos)
-                                       if line.value[pos] == '<' then
+                                       if pos >= 0 and line.value[pos] == '<' then
                                                pos += 1
                                                pos = md.read_until(link, pos, '>')
                                                pos += 1
-                                       else
+                                       else if pos >= 0 then
                                                pos = md.read_until(link, pos, ' ', '\n')
                                        end
                                        if not link.is_empty then