github/api: return an empty list instead of crashing for issues without labels

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

diff --git a/lib/github/api.nit b/lib/github/api.nit
index 782d598..ba8943e 100644 (file)
--- a/lib/github/api.nit
+++ b/lib/github/api.nit
@@ -678,6 +678,7 @@ class Issue
        # List of labels on this issue associated to their names.
        fun labels: Map[String, Label] do
                var res = new HashMap[String, Label]
+               if not json.has_key("labels") then return res
                for obj in json["labels"].as(JsonArray) do
                        if not obj isa JsonObject then continue
                        var name = obj["name"].to_s