lib/dom: avoid crash on empty tags data access

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

diff --git a/lib/dom/dom.nit b/lib/dom/dom.nit
index 5a1b8c0..0dfee06 100644 (file)
--- a/lib/dom/dom.nit
+++ b/lib/dom/dom.nit
@@ -58,13 +58,13 @@ redef class XMLStartTag
        # var xml = code.to_xml
        # assert xml["animal"].first["tiger"].first.as(XMLStartTag).data == "This is a white tiger!"
        # ~~~
        # var xml = code.to_xml
        # assert xml["animal"].first["tiger"].first.as(XMLStartTag).data == "This is a white tiger!"
        # ~~~

-       fun data: String
+       fun data: nullable String

        do
                for child in children do
                        if child isa PCDATA then return child.content
                        if child isa CDATA then return child.content
                end
        do
                for child in children do
                        if child isa PCDATA then return child.content
                        if child isa CDATA then return child.content
                end

-               abort
+               return null

        end
 end
 
        end
 end