css: Don't infloop when parsing broken borders

There was an infinite loop when parsing invalid text after having parsed
a color in the border shorthand. See attached testcase for an example.

1 files changed, 7 insertions, 0 deletions

diff --git a/gtk/gtkcssshorthandpropertyimpl.c b/gtk/gtkcssshorthandpropertyimpl.c
index 06c20ddcd4..c81e2c4703 100644
--- a/gtk/gtkcssshorthandpropertyimpl.c
+++ b/gtk/gtkcssshorthandpropertyimpl.c
@@ -353,6 +353,13 @@ parse_border_side (GtkCssShorthandProperty  *shorthand,
         if (values[2] == NULL)
           return FALSE;
       }
+    else
+      {
+        /* We parsed and there's still stuff left?
+         * Pretend we didn't notice and let the normal code produce
+         * a 'junk at end of value' error */
+        break;
+      }
   }
   while (!value_is_done_parsing (parser));